/* PrelimsPYQ - one stylesheet for every page. Look: purple top bar, yellow CTA,
   gradient hero, pastel cards, article-style pages with a sidebar. */

@import url("https://fonts.googleapis.com/css2?family=Ubuntu:wght@500;700&family=Open+Sans:wght@400;600;700&family=Rubik:wght@700;800&family=Merriweather:wght@900&family=Dancing+Script:wght@700&display=swap");

:root {
  --bg: #ffffff;
  --surface: #ffffff;
  --surface-2: #f6f3f6;
  --text: #2b2230;
  --muted: #6c6170;
  --border: #e6dfe5;
  --primary: #85386d;          /* top bar, headings, main buttons */
  --primary-hover: #6d2b59;
  --primary-soft: #f7ebf3;
  --on-primary: #ffffff;
  --heading: #6b2c58;
  --link: #a3136f;
  --magenta: #a8137e;
  --teal: #177f9c;
  --yellow: #fbf67b;
  --yellow-hover: #f3ec4f;
  --navy: #101a3a;
  --amber: #f5a71b;
  --pink-card: #fecbe6;
  --peach-card: #fde0d7;
  --blue-card: #a8dbe8;
  --lilac-card: #e9dcf7;
  --success: #12804a;
  --success-soft: #e6f5ec;
  --danger: #c23434;
  --danger-soft: #fcebeb;
  --warning: #a86700;
  --warning-soft: #fff4dd;
  --marked: #7a3fc4;
  --marked-soft: #f2eafd;
  --radius: 10px;
  --radius-sm: 4px;
  --shadow: 0 2px 10px rgba(80, 30, 60, 0.08);
  --font: "Open Sans", system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  --font-head: "Ubuntu", "Open Sans", system-ui, sans-serif;
  --font-strong: "Rubik", "Ubuntu", system-ui, sans-serif;
  --font-hero: "Merriweather", Georgia, "Times New Roman", serif;
  --font-script: "Dancing Script", "Segoe Script", cursive;
  color-scheme: light;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.65 var(--font);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
main { flex: 1; }
img { max-width: 100%; }
a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3 { font-family: var(--font-head); color: var(--heading); line-height: 1.2; margin: 0 0 0.5em; }
h1 { font-size: clamp(2rem, 4.2vw, 3.3rem); font-weight: 700; }
h2 { font-size: 1.6rem; font-weight: 500; }
h3 { font-size: 1.15rem; font-weight: 700; }
p { margin: 0 0 1em; }
[hidden] { display: none !important; }
:focus-visible { outline: 3px solid color-mix(in srgb, var(--primary) 55%, transparent); outline-offset: 2px; }

/* ---------------------------------------------------------------- layout */

.container { width: 100%; max-width: 1240px; margin: 0 auto; padding: 0 16px; }
.container-narrow { max-width: 760px; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.no-margin { margin: 0; }
.h2-size { font-size: clamp(1.7rem, 3.2vw, 2.4rem); }
.field-label { font-weight: 600; font-size: 0.92rem; }
.auth-foot { margin: 18px 0 0; }
.pay-foot { margin: 12px 0 0; }
#dev-note { margin-top: 12px; }
.palette-submit { margin-top: 14px; }
.muted { color: var(--muted); }
.small { font-size: 0.875rem; }
.center { text-align: center; }
.stack > * + * { margin-top: 16px; }
.row { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.spacer { flex: 1; }
.section { padding: 48px 0; }
.section-tight { padding: 28px 0; }
.eyebrow { font-size: 0.8rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: var(--magenta); }

/* ---------------------------------------------------------------- header */

.site-header { background: var(--primary); position: sticky; top: 0; z-index: 40; box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12); }
.site-header .nav { display: flex; align-items: center; gap: 22px; min-height: 96px; }
.logo {
  display: inline-flex; align-items: center; gap: 0; line-height: 1; color: #fff;
  font-family: var(--font-strong); font-weight: 800; font-size: 1.7rem; letter-spacing: -0.02em;
  padding: 6px 0; text-decoration: none;
}
.logo:hover { text-decoration: none; }
.logo .l1 { color: #ffffff; }
.logo .l2 { color: var(--yellow); }
.menu { display: flex; align-items: center; gap: 2px; margin-left: auto; }
.menu > .item { position: relative; }
.menu > .item > a, .menu > .item > button {
  display: inline-flex; align-items: center; gap: 7px; padding: 10px 12px; background: none; border: 0;
  color: #fff; font: 500 0.98rem/1 var(--font-head); text-transform: uppercase; cursor: pointer; white-space: nowrap;
}
.menu > .item > a:hover, .menu > .item > button:hover { text-decoration: none; color: var(--yellow); }
.menu .chev { width: 8px; height: 8px; border-right: 1.6px solid currentColor; border-bottom: 1.6px solid currentColor; transform: translateY(-3px) rotate(45deg); }
.dropdown {
  position: absolute; top: calc(100% + 4px); left: 0; min-width: 280px; background: #fff; border-radius: 2px;
  box-shadow: 0 10px 28px rgba(30, 10, 25, 0.18); padding: 6px 0; display: none; z-index: 50;
}
.dropdown::before { content: ""; position: absolute; top: -8px; left: 0; right: 0; height: 8px; }
.menu > .item:hover > .dropdown, .menu > .item:focus-within > .dropdown { display: block; }
.dropdown a { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 11px 20px; color: #5c5560; font-size: 1.02rem; }
.dropdown a:hover { background: #f4f4f4; color: #1d1820; text-decoration: none; }
.dropdown .soon { font-size: 0.72rem; font-weight: 700; color: var(--magenta); text-transform: uppercase; letter-spacing: 0.04em; }

/* 2-level dropdown submenu */
.has-submenu { position: relative; }
.submenu-toggle {
  display: flex; width: 100%; justify-content: space-between; align-items: center;
  gap: 12px; padding: 11px 20px; color: #332d38; font-size: 1.02rem; font-weight: 700;
  background: none; border: 0; cursor: pointer; text-align: left; text-transform: none;
}
.submenu-toggle:hover, .has-submenu:hover > .submenu-toggle { background: #fdf2f8; color: var(--primary); }
.sub-chev { font-size: 1.1rem; line-height: 1; color: var(--primary); font-weight: 800; }
.submenu {
  display: none; position: absolute; top: 0; left: 100%; min-width: 290px;
  background: #fff; border-radius: 2px; box-shadow: 0 10px 28px rgba(30, 10, 25, 0.22);
  padding: 6px 0; z-index: 60; border-left: 2px solid var(--primary);
}
.has-submenu:hover > .submenu, .has-submenu:focus-within > .submenu, .has-submenu.open > .submenu { display: block; }
.submenu a { display: flex; justify-content: space-between; align-items: center; padding: 10px 18px; color: #5c5560; font-size: 0.98rem; font-weight: 500; }
.submenu a:hover { background: #f4f4f4; color: var(--primary); text-decoration: none; }

/* Nested 3-level dropdown */
.submenu .has-submenu { position: relative; }
.submenu .has-submenu > .submenu-toggle { font-size: 0.96rem; padding: 10px 18px; font-weight: 600; text-decoration: none; }
.submenu .has-submenu > .submenu {
  position: absolute; top: 0; left: 100%; min-width: 300px;
  background: #fff; box-shadow: 0 10px 30px rgba(30, 10, 25, 0.25);
  border-left: 2px solid var(--teal); z-index: 75;
}
@media (min-width: 1101px) {
  .menu > .item:nth-last-child(-n+4) .dropdown .submenu .submenu {
    left: auto; right: 100%; border-left: none; border-right: 2px solid var(--teal);
  }
}

.btn-cta { display: inline-flex; align-items: center; background: var(--yellow); color: #1a1420; font: 500 0.98rem/1 var(--font-head);
  text-transform: uppercase; padding: 15px 18px; border-radius: 2px; white-space: nowrap; margin-left: 14px; }
.btn-cta:hover { background: var(--yellow-hover); text-decoration: none; color: #1a1420; }
.menu-toggle { display: none; margin-left: auto; background: none; border: 2px solid rgba(255, 255, 255, 0.7); color: #fff; border-radius: 4px;
  padding: 8px 12px; font: 700 0.9rem var(--font-head); cursor: pointer; }

/* minimal bar used on the test page */
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; color: var(--text); font-size: 1.1rem; }
.brand:hover { text-decoration: none; }
.brand-mark { width: 34px; height: 34px; border-radius: 4px; background: var(--primary); color: #fff; display: grid; place-items: center;
  font-family: var(--font-strong); font-weight: 800; }

@media (max-width: 1100px) {
  .site-header .nav { min-height: 72px; flex-wrap: wrap; }
  .menu-toggle { display: inline-block; }
  .menu { display: none; width: 100%; flex-direction: column; align-items: stretch; padding: 4px 0 24px; margin-left: 0; }
  
  /* Smooth full-height mobile drawer scrolling */
  .site-header.open {
    position: fixed !important;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    height: 100vh !important;
    height: 100dvh !important;
    overflow-y: auto !important;
    -webkit-overflow-scrolling: touch !important;
    overscroll-behavior: contain !important;
    z-index: 1000 !important;
  }
  .site-header.open .menu {
    display: flex;
    padding-bottom: 40px;
  }
  .menu > .item > a, .menu > .item > button { width: 100%; justify-content: space-between; padding: 12px 4px; }
  .dropdown { position: static; display: block; box-shadow: none; background: rgba(255, 255, 255, 0.08); min-width: 0; }
  .dropdown a { color: #f6e9f2; padding: 9px 16px; font-size: 0.95rem; }
  .dropdown a:hover { background: rgba(255, 255, 255, 0.12); color: #fff; }
  .dropdown .soon { color: var(--yellow); }
  
  /* Mobile Accordion Submenus - all nesting levels flow inside drawer */
  .has-submenu,
  .submenu .has-submenu {
    position: static !important;
    width: 100% !important;
  }
  .submenu-toggle,
  .submenu .has-submenu > .submenu-toggle {
    color: #fff !important;
    padding: 10px 16px !important;
    font-size: 0.96rem !important;
    display: flex !important;
    width: 100% !important;
    justify-content: space-between !important;
    align-items: center !important;
  }
  .submenu-toggle:hover,
  .submenu .has-submenu > .submenu-toggle:hover {
    background: rgba(255, 255, 255, 0.1) !important;
    color: var(--yellow) !important;
  }
  .sub-chev { color: var(--yellow) !important; }
  .submenu,
  .submenu .has-submenu > .submenu {
    position: static !important;
    display: block !important;
    left: auto !important;
    right: auto !important;
    top: auto !important;
    min-width: 0 !important;
    width: 100% !important;
    box-shadow: none !important;
    background: rgba(0, 0, 0, 0.22) !important;
    border-left: 3px solid var(--yellow) !important;
    border-right: none !important;
    padding: 4px 0 4px 10px !important;
    box-sizing: border-box !important;
  }
  .submenu a,
  .submenu .has-submenu > .submenu a {
    color: #f6e9f2 !important;
    padding: 8px 16px !important;
    font-size: 0.92rem !important;
    display: block !important;
    white-space: normal !important;
  }
  .submenu a:hover,
  .submenu .has-submenu > .submenu a:hover {
    background: rgba(255, 255, 255, 0.12) !important;
    color: #fff !important;
  }
  .btn-cta { margin: 10px 0 0; justify-content: center; }
}

.site-footer { background: var(--primary); color: #f3e3ee; padding: 28px 0; margin-top: 56px; }
.site-footer p { margin: 0.25em 0; }
.site-footer a { color: #fff; }
.site-footer .muted { color: #f3e3ee; }

/* --------------------------------------------------------------- buttons */

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 10px 18px; border-radius: var(--radius-sm);
  border: 1px solid transparent; background: var(--surface-2); color: var(--text);
  font: inherit; font-weight: 600; cursor: pointer; text-decoration: none; white-space: nowrap;
  transition: background 0.15s, border-color 0.15s, transform 0.05s;
}
.btn:hover { text-decoration: none; background: var(--border); }
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: 0.55; cursor: not-allowed; }
.btn-primary { background: var(--primary); color: var(--on-primary); }
.btn-magenta { background: var(--magenta); color: #fff; }
.btn-magenta:hover { background: #8c0f69; }
.btn-teal { background: var(--teal); color: #fff; }
.btn-teal:hover { background: #126a82; }
.btn-dark { background: var(--navy); color: #fff; font-family: var(--font-strong); }
.btn-dark:hover { background: #1c2a57; }
.btn-amber { background: var(--amber); color: #1a1420; font-family: var(--font-strong); }
.btn-amber:hover { background: #e0950c; }
.btn-primary:hover { background: var(--primary-hover); }
.btn-outline { background: transparent; border-color: var(--border); }
.btn-outline:hover { background: var(--surface-2); }
.btn-ghost { background: transparent; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-sm { padding: 6px 12px; font-size: 0.9rem; }
.btn-lg { padding: 14px 24px; font-size: 1.05rem; }
.btn-block { width: 100%; }

/* ----------------------------------------------------------------- cards */

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
}
.card-flat { box-shadow: none; }
.card h3 { margin-bottom: 0.35em; }
.grid { display: grid; gap: 16px; }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.grid-cards { grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); }

.badge {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 0.78rem; font-weight: 700; padding: 3px 10px; border-radius: 999px;
  background: var(--surface-2); color: var(--muted);
}
.badge-success { background: var(--success-soft); color: var(--success); }
.badge-warning { background: var(--warning-soft); color: var(--warning); }
.badge-primary { background: var(--primary-soft); color: var(--primary); }
.badge-danger { background: var(--danger-soft); color: var(--danger); }

.alert { padding: 12px 16px; border-radius: var(--radius-sm); border: 1px solid var(--border); background: var(--surface-2); }
.alert-error { background: var(--danger-soft); border-color: transparent; color: var(--danger); }
.alert-success { background: var(--success-soft); border-color: transparent; color: var(--success); }
.alert-warning { background: var(--warning-soft); border-color: transparent; color: var(--warning); }

/* ---------------------------------------------------------------- forms */

.form { display: grid; gap: 16px; }
.field { display: grid; gap: 6px; }
.field label { font-weight: 600; font-size: 0.92rem; }
.input {
  width: 100%; padding: 11px 13px; border-radius: var(--radius-sm);
  border: 1px solid var(--border); background: var(--surface); color: var(--text); font: inherit;
}
.input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-soft); }
.hint { font-size: 0.84rem; color: var(--muted); }

.auth-wrap { display: grid; place-items: center; padding: 48px 16px; }
.auth-card { width: 100%; max-width: 420px; }

.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip { position: relative; }
.chip input { position: absolute; opacity: 0; pointer-events: none; }
.chip span {
  display: inline-block; padding: 7px 13px; border-radius: 999px;
  border: 1px solid var(--border); background: var(--surface); cursor: pointer;
  font-size: 0.9rem; user-select: none;
}
.chip input:checked + span { background: var(--primary-soft); border-color: var(--primary); color: var(--primary); font-weight: 600; }
.chip input:focus-visible + span { outline: 3px solid color-mix(in srgb, var(--primary) 55%, transparent); }
.chip input:disabled + span { opacity: 0.5; cursor: not-allowed; }

/* ------------------------------------------------------------------ home */

.hero { padding: 64px 0 40px; }
.hero-grid { display: grid; grid-template-columns: 1.25fr 1fr; gap: 40px; align-items: center; }
.hero p.lead { font-size: 1.15rem; color: var(--muted); max-width: 560px; }
.hero-card .q-preview { font-weight: 600; margin-bottom: 14px; }
.hero-card .opt-preview { padding: 10px 12px; border: 1px solid var(--border); border-radius: var(--radius-sm); margin-top: 8px; font-size: 0.95rem; }
.hero-card .opt-preview.is-correct { border-color: var(--success); background: var(--success-soft); }
.skel { height: 12px; border-radius: 6px; background: var(--surface-2); margin: 14px 0 0; }
.skel.short { width: 55%; margin-bottom: 14px; }
.hero-note { margin: 14px 0 0; }
.stats { display: flex; gap: 28px; flex-wrap: wrap; margin-top: 28px; }
.stat strong { display: block; font-size: 1.6rem; }
.stat span { color: var(--muted); font-size: 0.9rem; }
.steps { counter-reset: step; }
.step::before {
  counter-increment: step; content: counter(step);
  display: grid; place-items: center; width: 34px; height: 34px; border-radius: 50%;
  background: var(--primary-soft); color: var(--primary); font-weight: 800; margin-bottom: 12px;
}
.price-card { max-width: 420px; margin: 0 auto; text-align: left; }
.price { font-size: 2.8rem; font-weight: 800; letter-spacing: -0.02em; }
.price small { font-size: 1rem; color: var(--muted); font-weight: 500; }
.checklist { list-style: none; padding: 0; margin: 16px 0 24px; display: grid; gap: 10px; }
.checklist li { padding-left: 28px; position: relative; }
.checklist li::before { content: "✓"; position: absolute; left: 0; color: var(--success); font-weight: 800; }
.faq details { border-bottom: 1px solid var(--border); padding: 14px 0; }
.faq summary { cursor: pointer; font-weight: 600; }
.faq details p { margin: 10px 0 0; color: var(--muted); }

/* ------------------------------------------------------------- dashboard */

.page-head { padding: 32px 0 8px; }
.status-banner { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.paper-card { display: flex; flex-direction: column; gap: 10px; }
.paper-card .badge { align-self: flex-start; }
.paper-card .meta { color: var(--muted); font-size: 0.9rem; }
.paper-card .btn { margin-top: auto; align-self: flex-start; }
.locked { position: relative; }
.lock-note { font-size: 0.85rem; color: var(--muted); }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 12px 10px; border-bottom: 1px solid var(--border); vertical-align: middle; }
th { font-size: 0.82rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--muted); font-weight: 700; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
.empty { padding: 28px; text-align: center; color: var(--muted); }

/* ------------------------------------------------------------------ test */

body.test-page { background: var(--bg); }
.test-bar {
  position: sticky; top: 0; z-index: 30;
  background: var(--surface); border-bottom: 1px solid var(--border);
}
.test-bar .container { display: flex; align-items: center; gap: 16px; min-height: 60px; max-width: 1280px; }
.test-title { font-weight: 700; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.timer {
  margin-left: auto; font-variant-numeric: tabular-nums; font-weight: 800; font-size: 1.15rem;
  padding: 6px 14px; border-radius: var(--radius-sm); background: var(--surface-2);
}
.timer.warn { background: var(--warning-soft); color: var(--warning); }
.timer.danger { background: var(--danger-soft); color: var(--danger); }
.save-state { font-size: 0.82rem; color: var(--muted); min-width: 70px; text-align: right; }

.test-layout { display: grid; grid-template-columns: 1fr 300px; gap: 20px; padding: 20px 16px 40px; max-width: 1280px; margin: 0 auto; width: 100%; }
.question-card { min-height: 420px; display: flex; flex-direction: column; }
.q-head { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 14px; }
.q-number { font-weight: 800; }
.q-text { font-size: 1.07rem; white-space: pre-wrap; margin-bottom: 14px; }
.q-statements { margin: 0 0 14px; padding-left: 0; list-style: none; display: grid; gap: 6px; }
.q-statements li { padding: 8px 12px; background: var(--surface-2); border-radius: var(--radius-sm); white-space: pre-wrap; }
.q-figure { padding: 12px; border: 1px dashed var(--border); border-radius: var(--radius-sm); margin-bottom: 14px; font-size: 0.95rem; white-space: pre-wrap; }
.options { display: grid; gap: 10px; margin: 6px 0 20px; }
.option {
  display: flex; gap: 12px; align-items: flex-start; padding: 12px 14px;
  border: 1.5px solid var(--border); border-radius: var(--radius-sm); cursor: pointer; background: var(--surface);
  transition: border-color 0.12s, background 0.12s;
}
.option:hover { border-color: color-mix(in srgb, var(--primary) 50%, var(--border)); }
.option input { position: absolute; opacity: 0; pointer-events: none; }
.option .letter {
  flex: none; width: 28px; height: 28px; border-radius: 50%; display: grid; place-items: center;
  border: 1.5px solid var(--border); font-weight: 700; font-size: 0.9rem;
}
.option.is-selected { border-color: var(--primary); background: var(--primary-soft); }
.option.is-selected .letter { background: var(--primary); border-color: var(--primary); color: var(--on-primary); }

.option.is-correct {
  border-color: var(--success) !important;
  background: var(--success-soft) !important;
  cursor: default;
}
.option.is-correct:hover { border-color: var(--success) !important; }
.option.is-correct .letter {
  background: var(--success) !important;
  border-color: var(--success) !important;
  color: #fff !important;
}
.option.is-correct .tag {
  color: var(--success) !important;
  background: color-mix(in srgb, var(--success) 14%, transparent);
  border: 1px solid color-mix(in srgb, var(--success) 35%, transparent);
  border-radius: 4px;
  padding: 3px 9px;
  letter-spacing: 0.02em;
}

.option.is-wrong {
  border-color: var(--danger) !important;
  background: var(--danger-soft) !important;
  cursor: default;
}
.option.is-wrong:hover { border-color: var(--danger) !important; }
.option.is-wrong .letter {
  background: var(--danger) !important;
  border-color: var(--danger) !important;
  color: #fff !important;
}
.option.is-wrong .tag {
  color: var(--danger) !important;
  background: color-mix(in srgb, var(--danger) 14%, transparent);
  border: 1px solid color-mix(in srgb, var(--danger) 35%, transparent);
  border-radius: 4px;
  padding: 3px 9px;
  letter-spacing: 0.02em;
}
.option:focus-within { outline: 3px solid color-mix(in srgb, var(--primary) 45%, transparent); outline-offset: 1px; }
.q-actions { margin-top: auto; display: flex; gap: 10px; flex-wrap: wrap; border-top: 1px solid var(--border); padding-top: 16px; }
.q-actions .spacer { min-width: 8px; }
.kbd-hint { font-size: 0.8rem; color: var(--muted); margin-top: 10px; }

.palette { position: sticky; top: 80px; align-self: start; }
.palette-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(38px, 1fr)); gap: 6px; max-height: 46vh; overflow-y: auto; padding: 2px; }
.pal-btn {
  height: 38px; border-radius: 8px; border: 1.5px solid var(--border); background: var(--surface);
  font: inherit; font-size: 0.85rem; font-weight: 700; cursor: pointer; color: var(--text); position: relative;
}
.pal-btn.visited { background: var(--danger-soft); border-color: transparent; color: var(--danger); }
.pal-btn.answered { background: var(--success); border-color: var(--success); color: #fff; }
.pal-btn.marked { background: var(--marked); border-color: var(--marked); color: #fff; }
.pal-btn.marked.answered::after { content: ""; position: absolute; right: 3px; bottom: 3px; width: 7px; height: 7px; border-radius: 50%; background: var(--success-soft); }
.pal-btn.current { outline: 3px solid var(--primary); outline-offset: 1px; }
.legend { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; font-size: 0.82rem; color: var(--muted); margin: 14px 0; }
.legend span { display: flex; align-items: center; gap: 6px; }
.legend i { width: 14px; height: 14px; border-radius: 4px; display: inline-block; border: 1.5px solid var(--border); }
.legend i.answered { background: var(--success); border-color: var(--success); }
.legend i.visited { background: var(--danger-soft); border-color: transparent; }
.legend i.marked { background: var(--marked); border-color: var(--marked); }
.palette-toggle { display: none; }

/* ----------------------------------------------------------------- modal */

.modal-backdrop {
  position: fixed; inset: 0; background: rgba(10, 14, 22, 0.55);
  display: grid; place-items: center; padding: 16px; z-index: 50;
}
.modal { max-width: 440px; width: 100%; }
.summary-list { display: grid; grid-template-columns: 1fr auto; gap: 8px 16px; margin: 16px 0 24px; }
.summary-list dd { margin: 0; font-weight: 700; text-align: right; }
.summary-list dt { color: var(--muted); }

/* --------------------------------------------------------------- results */

.score-hero { display: grid; grid-template-columns: auto 1fr; gap: 28px; align-items: center; }
.score-ring {
  --pct: 0;
  width: 150px; height: 150px; border-radius: 50%;
  background: conic-gradient(var(--primary) calc(var(--pct) * 1%), var(--surface-2) 0);
  display: grid; place-items: center;
}
.score-ring > div {
  width: 118px; height: 118px; border-radius: 50%; background: var(--surface);
  display: grid; place-items: center; text-align: center;
}
.score-ring strong { font-size: 1.7rem; display: block; line-height: 1.1; }
.score-ring span { font-size: 0.8rem; color: var(--muted); }
.result-stats { display: grid; grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); gap: 12px; }
.result-stat { padding: 12px 14px; background: var(--surface-2); border-radius: var(--radius-sm); }
.result-stat strong { display: block; font-size: 1.35rem; font-variant-numeric: tabular-nums; }
.result-stat span { font-size: 0.82rem; color: var(--muted); }
.result-stat.good strong { color: var(--success); }
.result-stat.bad strong { color: var(--danger); }
.bar { height: 8px; background: var(--surface-2); border-radius: 99px; overflow: hidden; min-width: 80px; }
.bar > i { display: block; height: 100%; background: var(--success); border-radius: 99px; }
.tabs { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 16px; }
.tab { padding: 7px 14px; border-radius: 999px; border: 1px solid var(--border); background: var(--surface); cursor: pointer; font: inherit; font-size: 0.9rem; color: var(--text); }
.tab[aria-selected="true"] { background: var(--text); color: var(--surface); border-color: var(--text); }
.review-item { margin-bottom: 16px; }
.review-item .option { cursor: default; }
.review-item .option.is-correct { border-color: var(--success); background: var(--success-soft); }
.review-item .option.is-correct .letter { background: var(--success); border-color: var(--success); color: #fff; }
.review-item .option.is-wrong { border-color: var(--danger); background: var(--danger-soft); }
.review-item .option.is-wrong .letter { background: var(--danger); border-color: var(--danger); color: #fff; }
.option .tag { margin-left: auto; font-size: 0.78rem; font-weight: 700; white-space: nowrap; }
.explanation { padding: 12px 14px; background: var(--surface-2); border-radius: var(--radius-sm); font-size: 0.95rem; }
.source { font-size: 0.82rem; color: var(--muted); margin-top: 10px; }

/* ----------------------------------------------------------------- toast */

.toast-host { position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%); z-index: 60; display: grid; gap: 8px; width: min(92vw, 420px); }
.toast { padding: 12px 16px; border-radius: var(--radius-sm); background: var(--text); color: var(--surface); box-shadow: var(--shadow); font-size: 0.95rem; }
.toast.error { background: var(--danger); color: #fff; }
.toast.success { background: var(--success); color: #fff; }

.spinner { width: 22px; height: 22px; border-radius: 50%; border: 3px solid var(--border); border-top-color: var(--primary); animation: spin 0.8s linear infinite; }
.loading { display: grid; place-items: center; padding: 64px 16px; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ------------------------------------------------------------ responsive */

@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; }
  .test-layout { grid-template-columns: 1fr; padding-top: 12px; }
  .palette { position: static; order: 2; }
  .palette-toggle { display: inline-flex; }
  .palette.collapsed .palette-body { display: none; }
}
@media (hover: none) {
  .kbd-hint { display: none; }
}
@media (max-width: 700px) {
  .grid-2 { grid-template-columns: 1fr; }
}
@media (max-width: 600px) {
  .card { padding: 18px; }
  .hero { padding: 36px 0 24px; }
  .score-hero { grid-template-columns: 1fr; justify-items: center; text-align: center; }
  .nav-links .hide-sm { display: none; }
  .q-actions .btn { flex: 1 1 auto; }
  .test-title { font-size: 0.92rem; }
  .save-state { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}

/* ---------------------------------------------------------------- portal */

.portal { padding-top: 56px; padding-bottom: 32px; }
.portal .lead { font-size: 1.1rem; max-width: 620px; }
.portal.center .lead { margin-left: auto; margin-right: auto; }
.portal-actions { justify-content: center; margin-top: 8px; }
.exam-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; margin-top: 28px; }
.exam-card { display: flex; flex-direction: column; gap: 10px; color: var(--text); transition: border-color 0.15s, transform 0.15s; }
.exam-card:hover { text-decoration: none; border-color: var(--primary); transform: translateY(-2px); }
.exam-card h2 { margin: 4px 0 0; }
.exam-card .badge { align-self: flex-start; }
.exam-card .btn { align-self: flex-start; margin-top: 8px; }
@media (max-width: 700px) { .exam-grid { grid-template-columns: 1fr; } }

/* ------------------------------------------------------- explanations, AI */

.explain-slot { margin-top: 12px; }
.explain-box { padding: 14px 16px; background: var(--surface-2); border-radius: var(--radius-sm); font-size: 0.95rem; }
.explain-box p { margin: 0 0 10px; }
.explain-box ul { margin: 6px 0 10px; padding-left: 20px; display: grid; gap: 4px; }
.key-concept { padding-top: 8px; border-top: 1px solid var(--border); }
.ai-note { margin: 10px 0 0; }
.ai-card .row { margin-bottom: 12px; }
.ai-review h3 { font-size: 1.15rem; }
.review-block { margin-top: 18px; }
.review-block h4 { margin: 0 0 8px; font-size: 0.95rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--muted); }
.review-block ul, .review-block ol { margin: 0; padding-left: 20px; display: grid; gap: 6px; }
.weak-list { display: grid; gap: 10px; }
.weak-item { padding: 10px 12px; border-left: 3px solid var(--danger); background: var(--surface-2); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; }
.plan > li ul { margin-top: 4px; }
.next-step { margin-top: 18px; }
.overall-stats { margin-bottom: 8px; }
.bar.bad > i { background: var(--danger); }
.bar.mid > i { background: var(--warning); }
.bar.wide { flex: 1; min-width: 120px; }
.topic-list { list-style: none; margin: 0; padding: 0; }
.topic-list li { display: flex; justify-content: space-between; gap: 12px; padding: 10px 0; border-bottom: 1px solid var(--border); }
.topic-list li:last-child { border-bottom: 0; }
.topic-stat { text-align: right; color: var(--muted); white-space: nowrap; }
.trend { display: grid; gap: 10px; }
.trend-row { display: grid; grid-template-columns: minmax(0, 2fr) 3fr auto; gap: 14px; align-items: center; color: var(--text); }
.trend-row:hover { text-decoration: none; }
.trend-label { display: flex; flex-direction: column; min-width: 0; }
.trend-label > span:first-child { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.num-cell { font-variant-numeric: tabular-nums; }
@media (max-width: 600px) { .trend-row { grid-template-columns: 1fr auto; } .trend-row .bar { display: none; } }

/* ======================================================= reference look */

.wrap { max-width: 1500px; margin: 0 auto; padding: 0 16px; }
.panel { background: #f4f8fd; border-radius: 12px; padding: 20px; margin-top: 36px; }

/* gradient hero banner */
.hero-banner {
  position: relative; overflow: hidden; border-radius: 6px; padding: 44px 48px; min-height: 360px;
  background: linear-gradient(100deg, #ff7eb9 0%, #ff9a8b 38%, #ffb36b 66%, #ffd85c 100%);
  display: grid; grid-template-columns: 1fr 240px; gap: 32px; align-items: center;
}
.hero-banner::after { /* soft light-bulb rays */
  content: ""; position: absolute; right: 18%; top: -10%; width: 420px; height: 420px; border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 236, 140, 0.55) 0%, rgba(255, 236, 140, 0) 62%); pointer-events: none;
}
.hero-banner h1 { font-family: var(--font-hero); color: #fff; font-size: clamp(2.3rem, 6vw, 5.2rem); line-height: 1.02; margin: 0;
  text-shadow: 0 2px 0 rgba(120, 30, 60, 0.15); position: relative; z-index: 1; }
.hero-banner h1 .with { font-family: var(--font-script); color: #1d1550; font-size: 0.72em; margin-right: 0.25em; text-shadow: none; }
.hero-banner h1 .dark { color: #1a1420; text-shadow: none; }
.cover {
  position: relative; z-index: 1; aspect-ratio: 3 / 4.2; border-radius: 3px; padding: 18px 16px; color: #fff; text-align: right;
  background: linear-gradient(180deg, #1f4e8c 0%, #3d5fa3 34%, #c9845f 66%, #e8b28a 100%);
  box-shadow: 0 10px 26px rgba(60, 20, 40, 0.35); display: flex; flex-direction: column; gap: 6px; overflow: hidden;
}
.cover .ribbon { position: absolute; left: -34px; top: 18px; transform: rotate(-45deg); background: #1b6fd1; font-size: 0.62rem;
  font-weight: 700; padding: 3px 40px; letter-spacing: 0.04em; }
.cover .c-top { font-family: var(--font-strong); font-weight: 700; font-size: 0.85rem; opacity: 0.9; margin-top: 18px; }
.cover .c-title { font-family: var(--font-strong); font-weight: 800; font-size: 1.5rem; line-height: 1.12; color: #ffd0e4; }
.cover .c-sub { font-size: 0.72rem; font-weight: 700; margin-top: auto; }
.cover .c-foot { font-size: 0.68rem; font-weight: 700; color: #ffe27a; }

.cta-row { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; margin-top: 30px; }
.cta-row .btn { width: 100%; padding: 14px 18px; font-size: 1.15rem; font-weight: 400; border-radius: 2px; }

/* pastel cards */
.tiles { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 32px 40px; margin-top: 24px; }
.tile { border-radius: 4px; padding: 30px 28px; text-align: center; display: flex; flex-direction: column; align-items: center; gap: 14px; }
.tile h2 { color: #141018; font-family: var(--font-head); font-weight: 500; font-size: clamp(1.4rem, 2.4vw, 2rem); margin: 0; }
.tile p { color: #3a3040; margin: 0; max-width: 520px; }
.tile .btn { border-radius: 2px; padding: 12px 30px; font-weight: 400; font-size: 1.05rem; }
.tile.pink { background: var(--pink-card); }
.tile.peach { background: var(--peach-card); }
.tile.blue { background: var(--blue-card); }
.tile.lilac { background: var(--lilac-card); }

/* article pages with a sidebar */
.article-layout { display: grid; grid-template-columns: minmax(0, 1fr) 360px; gap: 0; margin-top: 8px; }
.article-main { padding: 48px 40px 24px 0; border-right: 1px solid var(--primary); min-width: 0; }
.article-main h1 { font-size: clamp(2rem, 4vw, 3.6rem); }
.article-main h2 { font-size: clamp(1.5rem, 2.6vw, 2.4rem); color: var(--heading); font-weight: 500; margin-top: 1.2em; }
.meta-line { display: flex; flex-wrap: wrap; gap: 8px 22px; color: var(--heading); font-size: 0.86rem; text-transform: uppercase; letter-spacing: 0.04em; margin: 4px 0 28px; }
.meta-line span::before { content: "•"; margin-right: 8px; opacity: 0.7; }
.meta-line span:first-child::before { content: none; }
.sidebar { padding: 76px 0 24px 40px; }
.side-card { border: 1px solid var(--border); border-radius: 14px; padding: 26px 16px 18px; box-shadow: var(--shadow); position: sticky; top: 120px; }
.side-card > h3 { font-family: var(--font-strong); font-weight: 800; color: #12121c; text-transform: uppercase; font-size: 1.75rem; line-height: 1.12;
  margin: 0 12px 18px; padding-bottom: 18px; border-bottom: 1px solid var(--border); }
.side-inner { border: 1px solid var(--border); border-radius: 10px; padding: 18px; background: #fbfafc; }
.side-inner .cover { max-width: 250px; margin: 0 auto; }
.side-kicker { color: #b04a12; font-family: var(--font-strong); font-weight: 700; text-transform: uppercase; font-size: 0.9rem; margin: 18px 0 4px; }
.side-title { font-family: var(--font-strong); font-weight: 800; text-transform: uppercase; color: #12121c; font-size: 1.35rem; line-height: 1.15; margin: 0 0 10px; }
.side-text { color: #4a4250; font-size: 1rem; text-align: justify; }
.side-inner .btn { width: 100%; margin-top: 12px; padding: 12px; border-radius: 6px; font-size: 1.05rem; }

/* bordered PYQ table */
.pyq-table { width: 100%; border-collapse: collapse; margin: 18px 0 8px; font-size: 1.04rem; }
.pyq-table th, .pyq-table td { border: 1px solid #2b2230; padding: 11px 10px; text-align: left; vertical-align: middle; }
.pyq-table thead th { background: #f4f4f4; color: #1d1820; font-weight: 600; font-size: 1.04rem; text-transform: none; letter-spacing: 0;
  border-bottom: 3px solid #1d1820; }
.pyq-table td.sr { width: 72px; }
.pyq-table td.num, .pyq-table th.num { text-align: right; }
.pyq-table .click { color: var(--link); background: none; border: 0; padding: 0; font: inherit; cursor: pointer; }
.pyq-table .click:hover { text-decoration: underline; }
.pyq-table .soon-note { color: var(--muted); font-size: 0.9rem; }

.hero-banner.compact {
  display: block;
  min-height: 0;
  padding: 30px 34px;
  margin: 4px 0 22px;
}
.hero-banner.compact h1 {
  font-size: clamp(1.85rem, 5vw, 3.4rem);
  line-height: 1.1;
  max-width: 100%;
}
.hero-actions { margin-bottom: 8px; }
.small-tiles { gap: 18px; }
.small-tiles .tile { padding: 22px 20px; }
.small-tiles .tile h2 { font-size: 1.3rem; }
.topic-chips { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 6px; }
.topic-chips span { font-size: 0.8rem; color: var(--muted); background: var(--surface-2); border-radius: 3px; padding: 1px 7px; }

/* page head on app pages */
.page-head h1 { font-size: clamp(1.9rem, 3.4vw, 2.8rem); }

@media (max-width: 1000px) {
  .article-layout { grid-template-columns: 1fr; }
  .article-main { border-right: 0; padding-right: 0; padding-top: 32px; }
  .sidebar { padding: 0 0 24px; }
  .side-card { position: static; }
}
@media (max-width: 800px) {
  .hero-banner { grid-template-columns: 1fr; padding: 30px 24px; min-height: 0; }
  .hero-banner.compact { padding: 24px 20px; }
  .hero-banner.compact h1 { font-size: clamp(1.75rem, 7vw, 2.5rem); }
  .hero-banner .cover { max-width: 210px; }
  .cta-row, .tiles { grid-template-columns: 1fr; gap: 16px; }
}

/* detailed explanations */
.explain-box.detailed { background: #fbf8fb; border: 1px solid var(--border); }
.topic-notes h4 { margin: 14px 0 10px; font-family: var(--font-head); color: var(--heading); font-size: 1rem; }
.topic-note { border: 1px solid var(--border); border-radius: 8px; padding: 12px 14px; margin-bottom: 10px; background: #fff; }
.topic-note.is-correct { border-color: var(--success); }
.topic-head { display: flex; gap: 10px; align-items: center; margin-bottom: 6px; }
.topic-head .letter { width: 26px; height: 26px; border-radius: 50%; display: grid; place-items: center; border: 1.5px solid var(--border);
  font-weight: 700; font-size: 0.85rem; flex: none; }
.topic-note.is-correct .topic-head .letter { background: var(--success); border-color: var(--success); color: #fff; }
.topic-note ul { margin: 0; padding-left: 20px; display: grid; gap: 3px; }
.current-affairs { margin-top: 10px; padding: 10px 12px; background: #fff8dc; border-left: 4px solid var(--amber); border-radius: 0 6px 6px 0; }
.ca-label { display: inline-block; font: 700 0.75rem var(--font-strong); text-transform: uppercase; letter-spacing: 0.05em; color: #8a5a00; margin-bottom: 4px; }
.sources-list { margin-top: 8px; font-size: 0.82rem; }
.sources-list ul { padding-left: 18px; word-break: break-all; }

/* ------------------------------------------------- sub-topic accordion panel */

.subtopic-row td { padding: 0 !important; border-top: 0 !important; }
.subtopic-cell { padding: 0 !important; background: var(--primary-soft); border-top: 0; }

.subtopic-panel { padding: 20px 18px 22px; animation: st-drop 0.18s ease; }
@keyframes st-drop { from { opacity: 0; transform: translateY(-6px); } to { opacity: 1; transform: none; } }

.st-header { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: 14px; flex-wrap: wrap; gap: 6px; }
.st-subject-label { font-family: var(--font-head); font-weight: 700; color: var(--heading); font-size: 1.05rem; }
.st-total { font-size: 0.85rem; color: var(--muted); }

.st-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); gap: 12px; }

.st-card {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 14px 14px 12px; display: flex; flex-direction: column; gap: 6px;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.st-card:hover { border-color: var(--primary); box-shadow: 0 2px 10px rgba(133, 56, 109, 0.13); }
.st-card-all { background: var(--primary-soft); border-color: var(--primary); }

.st-card-label { font-weight: 600; font-size: 0.92rem; color: var(--text); line-height: 1.3; }
.st-card-count { font-size: 0.8rem; color: var(--muted); }

.st-btn {
  margin-top: auto; padding: 6px 14px; font-size: 0.85rem; font-weight: 600;
  border: 1.5px solid var(--primary); border-radius: 6px; cursor: pointer;
  background: var(--primary); color: #fff;
  transition: background 0.15s, color 0.15s;
}
.st-btn:hover { background: var(--primary-hover); border-color: var(--primary-hover); }
.st-btn:disabled { opacity: 0.6; cursor: wait; }
.st-btn-all { display: block; width: 100%; text-align: center; padding: 10px; font-size: 0.95rem; }

.st-card-free {
  border-color: #86efac;
  background: #f0fdf4;
}
.st-card-free:hover {
  border-color: var(--success);
  box-shadow: 0 2px 10px rgba(16, 185, 129, 0.18);
}
.st-btn-locked {
  background: #fff;
  color: var(--primary);
  border: 1.5px solid var(--primary);
}
.st-btn-locked:hover {
  background: var(--primary-soft);
  color: var(--primary);
}

.pyq-table .click { color: var(--primary); font-weight: 600; padding: 4px 10px;
  border: 1.5px solid var(--primary); border-radius: 6px; background: none;
  cursor: pointer; font-size: 0.9rem; transition: background 0.15s, color 0.15s; }
.pyq-table .click:hover { background: var(--primary); color: #fff; text-decoration: none; }

@media (max-width: 640px) {
  .st-grid { grid-template-columns: 1fr 1fr; }
  .subtopic-panel { padding: 14px 10px 16px; }
}
@media (max-width: 420px) {
  .st-grid { grid-template-columns: 1fr; }
}

/* ------------------------------------------------- Anti-copy content protection */
body.no-copy, .no-copy {
  -webkit-user-select: none !important;
  -moz-user-select: none !important;
  -ms-user-select: none !important;
  user-select: none !important;
  -webkit-touch-callout: none !important;
}

/* Allow text selection in inputs and textareas only */
input, textarea, select {
  -webkit-user-select: auto !important;
  -moz-user-select: auto !important;
  -ms-user-select: auto !important;
  user-select: auto !important;
}

/* Disable print preview */
@media print {
  body {
    display: none !important;
  }
}

/* ------------------------------------------------- Social login buttons & dividers */
.auth-divider {
  display: flex;
  align-items: center;
  text-align: center;
  margin: 18px 0;
  color: var(--muted);
  font-size: 0.85rem;
}
.auth-divider::before,
.auth-divider::after {
  content: '';
  flex: 1;
  border-bottom: 1px solid var(--border);
}
.auth-divider span {
  padding: 0 10px;
}

.social-btns {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 6px;
}

.btn-social {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  width: 100%;
  padding: 10px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: #fff;
  color: var(--heading);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, box-shadow 0.15s;
}
.btn-social:hover {
  background: #faf7fa;
  border-color: #c7b6c3;
  box-shadow: 0 1px 4px rgba(0,0,0,0.06);
}
.btn-social svg {
  flex-shrink: 0;
}
.btn-google {
  color: #3c4043;
}

.forgot-password-link {
  display: block;
  text-align: right;
  font-size: 0.84rem;
  color: var(--primary);
  margin-top: -6px;
  margin-bottom: 14px;
}
.forgot-password-link:hover {
  text-decoration: underline;
}

/* ------------------------------------------------- WhatsApp & Support Footer styling */
.footer-support {
  background: rgba(0, 0, 0, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 12px;
  padding: 16px 20px;
  margin-bottom: 22px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.footer-support-head {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 1.05rem;
  color: #fff;
}
.footer-support-p {
  margin: 0;
  font-size: 0.9rem;
  color: #f7eaf3;
  line-height: 1.4;
}
.footer-contact-btns {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 4px;
}
.btn-whatsapp {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 8px 16px;
  border-radius: 8px;
  background: #25D366;
  color: #ffffff !important;
  font-weight: 600;
  font-size: 0.92rem;
  text-decoration: none !important;
  box-shadow: 0 2px 6px rgba(0,0,0,0.2);
  transition: transform 0.1s, background 0.15s, box-shadow 0.15s;
}
.btn-whatsapp:hover {
  background: #20ba5a;
  transform: translateY(-1px);
  box-shadow: 0 4px 10px rgba(0,0,0,0.25);
}
.btn-whatsapp svg {
  flex-shrink: 0;
}




/* ------------------------------------------------ Language Selectors */
#lang-selector-top, #lang-selector-card {
  display: inline-flex;
  align-items: center;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
  margin: 0 6px;
}
#lang-selector-top button, #lang-selector-card button {
  padding: 4px 10px;
  font-size: 0.82rem;
  font-weight: 700;
  border: none;
  border-radius: 0;
  cursor: pointer;
  background: transparent;
  color: var(--text);
  transition: background 0.12s, color 0.12s;
}
#review-lang-selector button {
  transition: background 0.12s, color 0.12s;
}

@media (max-width: 640px) {
  #lang-selector-top {
    margin: 0 4px;
  }
  #lang-selector-top button {
    padding: 3px 6px !important;
    font-size: 0.74rem !important;
  }
  .test-title {
    max-width: 110px;
    font-size: 0.85rem;
  }
}
@media (max-width: 440px) {
  .test-title {
    display: none;
  }
}


/* =========================================================================
   Mobile Viewport & Responsiveness Polish (Phones & Tablets)
   ========================================================================= */

/* Fixed Header scroll-margin offset so anchor targets are not hidden */
html {
  scroll-behavior: smooth;
}

[id^="mains-"],
#papers,
#subjects,
#custom,
#free,
#practice,
#features,
#pricing {
  scroll-margin-top: 85px;
}

/* Responsive Table Wrapper with Horizontal Scroll */
.pyq-table-wrap {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: 14px 0 20px;
  border-radius: 6px;
  border: 1px solid #cbd5e1;
  background: #fff;
}
.pyq-table-wrap .pyq-table {
  min-width: 580px;
  margin: 0;
  border: none;
}

/* Jump to Paper quick links responsive container */
.paper-jump-links {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}
@media (max-width: 768px) {
  .paper-jump-links {
    flex-direction: column;
    gap: 8px;
  }
  .paper-jump-links a.btn {
    width: 100%;
    justify-content: flex-start;
    text-align: left;
    white-space: normal;
    line-height: 1.35;
    padding: 10px 14px;
    font-size: 0.92rem;
  }
}

/* Feature checklist responsive grid */
.checklist-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 14px 24px;
}
@media (max-width: 680px) {
  .checklist-grid {
    grid-template-columns: 1fr !important;
    gap: 12px !important;
  }
}

/* Mobile screen constraints & overflow prevention */
@media (max-width: 640px) {
  body {
    overflow-x: hidden;
  }
  .wrap {
    padding-left: 12px;
    padding-right: 12px;
  }
  .card {
    padding: 16px 14px !important;
    box-sizing: border-box !important;
    max-width: 100% !important;
  }
  /* Ensure large title fonts scale gracefully on small screens */
  h1 {
    font-size: 1.7rem !important;
    line-height: 1.25 !important;
  }
  h2 {
    font-size: 1.35rem !important;
  }
}


/* ------------------------------------------------- Rich Explanation Formatting */
.exp-rich-box {
  line-height: 1.7;
  color: var(--text);
  font-size: 1.0rem;
}
.exp-heading {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.08rem;
  color: var(--heading);
  margin: 18px 0 10px;
  display: flex;
  align-items: center;
  gap: 8px;
  border-bottom: 1.5px solid color-mix(in srgb, var(--primary) 20%, transparent);
  padding-bottom: 5px;
}
.exp-heading:first-child {
  margin-top: 0;
}
.exp-correct-banner {
  background: #f0fdf4;
  color: #15803d;
  border: 1.5px solid #86efac;
  border-radius: 6px;
  padding: 10px 14px;
  margin-bottom: 14px;
  font-weight: 700;
  font-size: 1.02rem;
  line-height: 1.5;
}
.exp-bullet-item {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  margin-bottom: 6px;
  line-height: 1.65;
}
.exp-bullet-marker {
  color: var(--primary);
  font-weight: 700;
  user-select: none;
  flex: none;
  margin-top: 1px;
}
.exp-bullet-content {
  flex: 1;
}
.exp-indent-1 {
  padding-left: 20px;
}
.exp-indent-2 {
  padding-left: 38px;
}
.exp-divider {
  border: 0;
  border-top: 1.5px dashed var(--border);
  margin: 16px 0;
}
.exp-math-block {
  margin: 12px 0;
  padding: 10px 16px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  text-align: center;
  overflow-x: auto;
  font-size: 1.05rem;
}
.exp-inline-math {
  background: color-mix(in srgb, var(--primary) 8%, transparent);
  padding: 1px 6px;
  border-radius: 4px;
  font-family: 'KaTeX_Main', 'Times New Roman', serif;
  font-style: italic;
  font-size: 0.98em;
  color: var(--heading);
}
.exp-p {
  margin-bottom: 10px;
  line-height: 1.7;
}
.exp-strong {
  font-weight: 700;
  color: var(--heading);
}
.exp-code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  background: var(--surface-2);
  border: 1px solid var(--border);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.92em;
}