/*
 * College Test Coach — shared marketing styles
 * Source of truth: public/coming-soon.html (App Redesign v2 tokens)
 */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root,
html[data-theme="dark"] {
  color-scheme: dark;

  /* Palette (source values) */
  --palette-deep-navy: #0d0b22;
  --palette-panel: #161436;
  --palette-panel-soft: #1e1c44;
  --palette-white: #ffffff;
  --palette-lime: #b8eb4a;
  --palette-teal: #1b9aaa;
  --palette-logo-olive: #708238;
  --palette-error: #f87171;
  --palette-error-soft: #fecaca;
  /* RGB tuples for rgba(var(--*-rgb), α) */
  --palette-deep-navy-rgb: 13, 11, 34;
  --palette-lime-rgb: 184, 235, 74;
  --palette-teal-rgb: 27, 154, 170;
  --palette-purple-rgb: 62, 38, 180;
  --palette-error-rgb: 248, 113, 113;
  --palette-sand-rgb: 240, 240, 236;

  /* Transparency helpers */
  --palette-white-border-faint: rgba(255, 255, 255, 0.07);
  --palette-white-border-mid: rgba(255, 255, 255, 0.22);
  --palette-white-text-muted: rgba(255, 255, 255, 0.62);
  --palette-white-text-soft: rgba(255, 255, 255, 0.38);
  --palette-white-text-placeholder: rgba(255, 255, 255, 0.78);

  /* Semantic */
  --color-page-bg: var(--palette-deep-navy);
  --color-panel: var(--palette-panel);
  --color-nav-bg: var(--color-panel);
  --color-input-bg: var(--palette-panel-soft);
  --color-border-subtle: var(--palette-white-border-faint);
  --color-border-input: var(--palette-white-border-mid);
  --color-accent: var(--palette-lime);
  --color-text: var(--palette-white);
  --color-text-muted: var(--palette-white-text-muted);
  --color-text-caption: var(--palette-white-text-soft);
  --color-text-placeholder: var(--palette-white-text-placeholder);
  --color-on-accent: var(--palette-deep-navy);
  --color-accent-glow-soft: rgba(var(--palette-lime-rgb), 0.3);
  --color-accent-tint-soft: rgba(var(--palette-lime-rgb), 0.12);
  --color-accent-tint-border: rgba(var(--palette-lime-rgb), 0.35);
  --color-success-message-text: var(--palette-lime);
  --color-focus-ring-accent: rgba(var(--palette-lime-rgb), 0.45);
  --color-chip-bg: rgba(var(--palette-sand-rgb), 0.09);
  --color-chip-border: rgba(var(--palette-sand-rgb), 0.22);
  --color-chip-text: rgba(var(--palette-sand-rgb), 0.82);
  --color-error-tint-bg: rgba(var(--palette-error-rgb), 0.12);
  --color-error-tint-border: rgba(var(--palette-error-rgb), 0.35);
  --color-error-text: var(--palette-error-soft);
  --color-lede: rgba(255, 255, 255, 0.82);
  --color-hero-cta-border: rgba(255, 255, 255, 0.45);
  --color-hero-cta-hover-bg: rgba(255, 255, 255, 0.1);
  --color-countdown-sep: rgba(255, 255, 255, 0.14);
  --color-post-card-hover-bg: var(--palette-panel-soft);
  --color-post-card-hover-border: rgba(var(--palette-lime-rgb), 0.3);
  --shadow-elevated: 0 1px 4px rgba(var(--palette-deep-navy-rgb), 0.4),
    0 4px 16px rgba(0, 0, 0, 0.3);
  --decor-blob-purple: rgba(var(--palette-purple-rgb), 0.12);
  --decor-blob-teal: rgba(var(--palette-teal-rgb), 0.1);

  --font-display: 'Outfit', system-ui, sans-serif;
  --font-body: 'DM Sans', system-ui, sans-serif;
  --font-mono: 'DM Mono', ui-monospace, monospace;
}

html[data-theme="light"] {
  color-scheme: light;

  --color-page-bg: #f8f7f4;
  --color-panel: #ffffff;
  --color-nav-bg: #ffffff;
  --color-input-bg: #f0f0ec;
  --color-border-subtle: rgba(var(--palette-deep-navy-rgb), 0.08);
  --color-border-input: rgba(var(--palette-deep-navy-rgb), 0.18);
  --color-accent: #8fbe2e;
  --color-text: var(--palette-deep-navy);
  --color-text-muted: rgba(var(--palette-deep-navy-rgb), 0.68);
  --color-text-caption: rgba(var(--palette-deep-navy-rgb), 0.45);
  --color-text-placeholder: rgba(var(--palette-deep-navy-rgb), 0.42);
  --color-on-accent: var(--palette-deep-navy);
  --color-accent-glow-soft: rgba(var(--palette-lime-rgb), 0.22);
  --color-accent-tint-soft: rgba(var(--palette-lime-rgb), 0.16);
  --color-accent-tint-border: rgba(var(--palette-lime-rgb), 0.42);
  --color-success-message-text: #5a8f18;
  --color-focus-ring-accent: rgba(var(--palette-lime-rgb), 0.55);
  --color-chip-bg: rgba(var(--palette-deep-navy-rgb), 0.05);
  --color-chip-border: rgba(var(--palette-deep-navy-rgb), 0.12);
  --color-chip-text: rgba(var(--palette-deep-navy-rgb), 0.72);
  --color-error-tint-bg: rgba(var(--palette-error-rgb), 0.1);
  --color-error-tint-border: rgba(var(--palette-error-rgb), 0.28);
  --color-error-text: #dc2626;
  --color-lede: rgba(var(--palette-deep-navy-rgb), 0.82);
  --color-hero-cta-border: rgba(var(--palette-deep-navy-rgb), 0.22);
  --color-hero-cta-hover-bg: rgba(var(--palette-deep-navy-rgb), 0.05);
  --color-countdown-sep: rgba(var(--palette-deep-navy-rgb), 0.16);
  --color-post-card-hover-bg: #f3f3ef;
  --color-post-card-hover-border: rgba(var(--palette-lime-rgb), 0.45);
  --shadow-elevated: 0 1px 3px rgba(var(--palette-deep-navy-rgb), 0.06),
    0 8px 24px rgba(var(--palette-deep-navy-rgb), 0.08);
  --decor-blob-purple: rgba(var(--palette-purple-rgb), 0.07);
  --decor-blob-teal: rgba(var(--palette-teal-rgb), 0.08);
}

html, body { min-height: 100dvh; }

body {
  font-family: var(--font-body);
  background: var(--color-page-bg);
  color: var(--color-text);
  display: flex;
  flex-direction: column;
  min-height: 100dvh;
  position: relative;
  overflow-x: hidden;
}

.blob-tr {
  position: absolute;
  top: -160px;
  right: -160px;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  background: var(--decor-blob-purple);
  pointer-events: none;
  z-index: 0;
}

.blob-bl {
  position: absolute;
  bottom: -100px;
  left: 80px;
  width: 360px;
  height: 360px;
  border-radius: 50%;
  background: var(--decor-blob-teal);
  pointer-events: none;
  z-index: 0;
}

/* —— Nav (CTCNav) —— */
.nav {
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 32px;
  background: var(--color-nav-bg);
  border-bottom: 1px solid var(--color-border-subtle);
  flex-shrink: 0;
  position: relative;
  z-index: 10;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: inherit;
}

.nav-logo {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  flex-shrink: 0;
  overflow: hidden;
  display: block;
}

.nav-logo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  border-radius: 8px;
}

.nav-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  letter-spacing: -0.3px;
  color: var(--color-text);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  font-size: 14px;
}

.nav-links a {
  color: var(--color-text-muted);
  text-decoration: none;
  cursor: pointer;
  font-weight: 600;
}

.nav-links a:hover { color: var(--color-text); }
.nav-links a.active { color: var(--color-accent); }

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  padding: 0;
  border: 1.5px solid var(--color-border-input);
  border-radius: 10px;
  background: var(--color-input-bg);
  color: var(--color-text-muted);
  cursor: pointer;
  flex-shrink: 0;
  transition: border-color 0.15s ease, color 0.15s ease, background 0.15s ease;
}

.theme-toggle:hover {
  color: var(--color-text);
  border-color: var(--color-accent-tint-border);
}

.theme-toggle:focus-visible {
  outline: 2px solid var(--color-focus-ring-accent);
  outline-offset: 2px;
}

.theme-toggle::before {
  content: '';
  width: 18px;
  height: 18px;
  background: currentColor;
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Ccircle cx='12' cy='12' r='4'/%3E%3Cpath d='M12 2v2M12 20v2M4.93 4.93l1.41 1.41M17.66 17.66l1.41 1.41M2 12h2M20 12h2M4.93 19.07l1.41-1.41M17.66 6.34l1.41-1.41'/%3E%3C/svg%3E") center / contain no-repeat;
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Ccircle cx='12' cy='12' r='4'/%3E%3Cpath d='M12 2v2M12 20v2M4.93 4.93l1.41 1.41M17.66 17.66l1.41 1.41M2 12h2M20 12h2M4.93 19.07l1.41-1.41M17.66 6.34l1.41-1.41'/%3E%3C/svg%3E") center / contain no-repeat;
}

html[data-theme="light"] .theme-toggle::before {
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='black'%3E%3Cpath d='M21 12.79A9 9 0 1 1 11.21 3 7 7 0 0 0 21 12.79z'/%3E%3C/svg%3E") center / contain no-repeat;
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='black'%3E%3Cpath d='M21 12.79A9 9 0 1 1 11.21 3 7 7 0 0 0 21 12.79z'/%3E%3C/svg%3E") center / contain no-repeat;
}

.tk-nav .theme-toggle {
  margin-left: auto;
}

@media (max-width: 720px) {
  .nav {
    padding: 0 14px;
    flex-wrap: wrap;
    height: auto;
    min-height: 60px;
    padding-top: 10px;
    padding-bottom: 10px;
  }
  .nav-links {
    gap: 12px;
    flex-wrap: wrap;
    justify-content: flex-end;
    font-size: 13px;
  }
}

/* —— Landing (coming-soon) —— */
.main--landing {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px 24px;
  position: relative;
  z-index: 1;
}

.stack {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  max-width: 640px;
  width: 100%;
}

.landing-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.25rem, 8vw, 72px);
  line-height: 1.05;
  letter-spacing: -1px;
  color: var(--color-text);
  margin-bottom: 24px;
}

.landing-title .accent { color: var(--color-accent); }
.landing-title .h-block { display: block; }

.divider {
  width: 60px;
  height: 4px;
  border-radius: 4px;
  background: var(--palette-lime);
}

.stack .divider {
  margin: 0 auto 2.25rem;
}

.content .divider {
  margin: 0 0 1.5rem;
}

.lede {
  font-size: 17px;
  color: var(--color-lede);
  line-height: 1.75;
  margin-bottom: 1.5rem;
  max-width: 520px;
}

.hero-blog-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 22px;
  margin-bottom: 1.5rem;
  border: 1.5px solid var(--color-hero-cta-border);
  border-radius: 10px;
  color: var(--color-text);
  text-decoration: none;
  font-weight: 600;
  font-size: 15px;
  transition: background 0.15s ease, transform 0.12s ease;
}

.hero-blog-cta:hover {
  background: var(--color-hero-cta-hover-bg);
  transform: translateY(-1px);
}

.hero-blog-cta:focus-visible {
  outline: 2px solid var(--color-focus-ring-accent);
  outline-offset: 3px;
}

.countdown-label {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-text-caption);
  margin-bottom: 1rem;
}

.countdown {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: clamp(0.65rem, 2.5vw, 1rem);
  margin-bottom: 2.75rem;
  flex-wrap: wrap;
}

.countdown-unit {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.35rem;
}

.cd-num {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2rem, 6vw, 2.85rem);
  line-height: 1;
  color: var(--color-text);
  font-variant-numeric: tabular-nums;
  min-width: clamp(2.25rem, 7vw, 3.25rem);
  text-align: center;
}

.cd-label {
  font-size: clamp(0.58rem, 1.45vw, 0.72rem);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-caption);
}

.countdown-sep {
  font-size: clamp(1.85rem, 4.5vw, 2.6rem);
  font-weight: 800;
  color: var(--color-countdown-sep);
  line-height: 1;
  margin-top: 0.08rem;
  padding: 0 0.2em;
}

.form-label {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: 0.85rem;
  width: 100%;
  max-width: 480px;
}

.email-row {
  display: flex;
  gap: 8px;
  width: 100%;
  max-width: 480px;
  margin-bottom: 1rem;
  flex-wrap: wrap;
  justify-content: center;
}

.email-row input[type="email"] {
  flex: 1;
  min-width: 200px;
  background: var(--color-input-bg);
  border: 1.5px solid var(--color-border-input);
  border-radius: 10px;
  padding: 14px 18px;
  font-family: var(--font-body);
  font-size: 14px;
  color: var(--color-text);
  outline: none;
}

.email-row input::placeholder { color: var(--color-text-placeholder); }
.email-row input:focus { border-color: var(--color-focus-ring-accent); }

.email-row button {
  background: #F97316;
  border: none;
  border-radius: 10px;
  padding: 14px 24px;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 14px;
  color: var(--palette-white);
  cursor: pointer;
  white-space: nowrap;
  box-shadow: 0 2px 12px rgba(249, 115, 22, 0.45);
  transition: transform 0.12s ease, opacity 0.2s;
}

.email-row button:hover:not(:disabled) { transform: translateY(-1px); }
.email-row button:disabled { opacity: 0.65; cursor: not-allowed; }

.chips {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: center;
}

.chip {
  background: var(--color-chip-bg);
  border: 1px solid var(--color-chip-border);
  border-radius: 20px;
  padding: 6px 16px;
  font-size: 12px;
  color: var(--color-chip-text);
}

.chip-icon { margin-right: 0.35rem; }

.form-msg {
  display: none;
  width: 100%;
  max-width: 480px;
  margin-bottom: 20px;
  padding: 12px 16px;
  border-radius: 10px;
  font-size: 14px;
  text-align: center;
}

.form-msg.ok {
  background: var(--color-accent-tint-soft);
  border: 1px solid var(--color-accent-tint-border);
  color: var(--color-success-message-text);
}

.form-msg.err {
  background: var(--color-error-tint-bg);
  border: 1px solid var(--color-error-tint-border);
  color: var(--color-error-text);
}

.form-msg.err a { color: var(--color-accent); }

.privacy-note {
  width: 100%;
  max-width: 480px;
  font-size: 12px;
  color: var(--color-text-caption);
  margin-bottom: 2rem;
  text-align: center;
}

/* —— Interior pages —— */
.main {
  flex: 1;
  padding: 40px 24px 56px;
  position: relative;
  z-index: 1;
}

.content {
  max-width: 720px;
  width: 100%;
  margin: 0 auto;
}

.content--wide { max-width: 760px; }

.page-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.75rem, 5vw, 28px);
  color: var(--color-text);
  margin-bottom: 12px;
  line-height: 1.2;
}

.page-title .accent { color: var(--color-accent); }

.page-intro,
.page-subtitle {
  color: var(--color-text-muted);
  font-size: 16px;
  line-height: 1.6;
  margin-bottom: 24px;
}

.page-subtitle { margin-bottom: 28px; }

.section-heading {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 800;
  color: var(--color-text);
  margin: 36px 0 14px;
}

.section-body {
  color: var(--color-text-muted);
  font-size: 16px;
  line-height: 1.65;
  margin-bottom: 16px;
}

.page-date {
  color: var(--color-text-caption);
  font-size: 14px;
  margin-bottom: 24px;
}

.card {
  background: var(--color-panel);
  border: 1px solid var(--color-border-subtle);
  border-radius: 12px;
  padding: 16px;
  margin-bottom: 14px;
}

.card-title {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 800;
  color: var(--color-text);
  margin-bottom: 10px;
}

.card-body {
  color: var(--color-text-muted);
  font-size: 15px;
  line-height: 1.55;
}

.card-body + .card-body { margin-top: 10px; }

.link-btn {
  display: inline-block;
  margin-top: 4px;
  color: var(--color-accent);
  font-weight: 700;
  font-size: 15px;
  text-decoration: none;
}

.link-btn:hover { opacity: 0.85; }

.footer-links {
  margin-top: 28px;
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--color-text-caption);
  font-size: 13px;
  text-decoration: none;
}

.footer-links a:hover { color: var(--color-text-muted); }

.post-card {
  display: block;
  text-decoration: none;
  background: var(--color-panel);
  border: 1px solid var(--color-border-subtle);
  border-radius: 10px;
  padding: 16px;
  margin-bottom: 12px;
  transition: border-color 0.15s ease, background 0.15s ease;
  cursor: pointer;
}

.post-card:hover {
  border-color: var(--color-post-card-hover-border);
  background: var(--color-post-card-hover-bg);
}

.post-date {
  font-size: 13px;
  color: var(--color-text-caption);
  margin-bottom: 6px;
}

.post-title {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 6px;
  line-height: 1.35;
}

.post-desc {
  font-size: 15px;
  color: var(--color-text-muted);
  line-height: 1.55;
}

.post-read-more {
  display: inline-block;
  margin-top: 10px;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-accent);
}

.back-link {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent);
  text-decoration: none;
  margin-bottom: 24px;
}

.back-link:hover { opacity: 0.8; }

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--color-text-muted);
  margin-bottom: 24px;
  flex-wrap: wrap;
}
.breadcrumb a {
  color: var(--color-accent);
  text-decoration: none;
}
.breadcrumb a:hover { opacity: 0.8; }
.breadcrumb [aria-current="page"] { color: var(--color-text-muted); }

.article-date {
  font-size: 13px;
  color: var(--color-text-caption);
  margin-bottom: 10px;
}

.article-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 28px;
  color: var(--color-text);
  line-height: 1.3;
  margin-bottom: 28px;
}

.post-body { line-height: 1.7; }

.post-body p {
  margin-bottom: 16px;
  color: var(--color-text-muted);
  font-size: 16px;
}

.post-body h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
  color: var(--color-text);
  margin: 28px 0 12px;
}

.post-body h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  color: var(--color-accent);
  margin: 24px 0 8px;
}

.post-body hr {
  border: none;
  border-top: 1px solid var(--color-border-subtle);
  margin: 28px 0;
}

.post-body ul {
  margin: 0 0 16px 20px;
  padding: 0;
  color: var(--color-text-muted);
}

.post-body li { margin-bottom: 8px; font-size: 16px; }
.post-body strong { color: var(--color-text); font-weight: 700; }
.post-body em { font-style: italic; }
.post-body a { color: var(--color-accent); text-decoration: none; }
.post-body a:hover { text-decoration: underline; }

/* —— Footer —— */
footer {
  text-align: center;
  padding: 14px 24px 24px;
  font-size: 12px;
  color: var(--color-text-caption);
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--color-border-subtle);
  flex-shrink: 0;
  line-height: 1.6;
}

.footer-inner {
  display: flex;
  gap: 40px;
  justify-content: center;
  flex-wrap: wrap;
  padding: 32px 24px 24px;
  border-bottom: 1px solid var(--color-border-subtle);
  margin-bottom: 16px;
  text-align: left;
}

.footer-col { flex: 1; min-width: 200px; max-width: 300px; }

.footer-col-heading {
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 700;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 14px;
}

.footer-popular-links {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-popular-links a {
  font-size: 14px;
  color: var(--color-text-muted);
  text-decoration: none;
  line-height: 1.45;
}

.footer-popular-links a:hover { color: var(--color-text); }

.footer-cta-text {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.55;
  margin-bottom: 14px;
}

.footer-cta-btn {
  display: inline-block;
  background: var(--color-accent);
  color: var(--color-on-accent);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 14px;
  padding: 8px 18px;
  border-radius: 6px;
  text-decoration: none;
  transition: opacity 0.15s;
}

.footer-cta-btn:hover { opacity: 0.88; }

.footer-copy {
  font-size: 12px;
  color: var(--color-text-caption);
  padding: 0 24px 8px;
}