/* ============================================================
   VocaGrow — marketing site styles
   Design tokens mirror the Flutter app (lib/core/theme/voca_colors.dart)
   so brand voice is consistent across product + web.
   ============================================================ */

:root {
  /* Brand */
  --violet: #5b3fff;
  --violet-light: #7c5cff;
  --violet-deep: #4a32d9;
  --cream: #fff8f0;
  --cream-deep: #fff2e1;
  --ink: #14122b;
  --ink-2: #4a4a5e;
  --ink-3: #8a8a9e;
  --surface: #ffffff;
  --surface-2: rgba(91, 63, 255, 0.06);
  --surface-3: rgba(91, 63, 255, 0.12);

  /* Accents (match `voca_colors.dart`) */
  --coral: #ff6b6b;
  --sun: #ffd93d;
  --mint: #6bcb77;
  --sky: #4d96ff;
  --lilac: #c589ff;
  --peach: #ffb48a;
  --butter: #f9e79f;
  --sage: #88c9a1;
  --voca-orange: #ff8c42;
  --voca-green: #6bcb77;
  --danger: #ef4444;

  /* Shape */
  --radius-card: 22px;
  --radius-btn: 18px;
  --radius-pill: 999px;

  /* Shadows */
  --shadow-card: 0 8px 24px rgba(91, 63, 255, 0.08);
  --shadow-card-hover: 0 12px 32px rgba(91, 63, 255, 0.16);
  --shadow-mascot: 0 14px 40px rgba(91, 63, 255, 0.22);

  /* Spacing scale */
  --gap-1: 4px;
  --gap-2: 8px;
  --gap-3: 12px;
  --gap-4: 16px;
  --gap-5: 24px;
  --gap-6: 32px;
  --gap-7: 48px;
  --gap-8: 72px;
  --gap-9: 96px;

  /* Type */
  --font-display: 'Bricolage Grotesque', system-ui, -apple-system,
    Segoe UI, Roboto, sans-serif;
  --font-ui: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo,
    Consolas, monospace;
}

/* ---------- Reset ---------- */

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-ui);
  font-size: 16px;
  line-height: 1.55;
  color: var(--ink);
  background: var(--cream);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img {
  max-width: 100%;
  display: block;
}

button {
  font: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

a {
  color: var(--violet);
  text-decoration: none;
  transition: color 160ms ease;
}

a:hover {
  color: var(--violet-deep);
}

/* ---------- Layout ---------- */

.container {
  width: 100%;
  max-width: 1180px;
  padding: 0 var(--gap-5);
  margin: 0 auto;
}

section {
  padding: var(--gap-9) 0;
}

@media (max-width: 768px) {
  section {
    padding: var(--gap-7) 0;
  }
}

/* ---------- Typography ---------- */

h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  letter-spacing: -0.02em;
  line-height: 1.1;
  color: var(--ink);
}

h1 {
  font-size: clamp(36px, 6vw, 64px);
  font-weight: 700;
}

h2 {
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 700;
}

h3 {
  font-size: clamp(20px, 2.5vw, 26px);
  font-weight: 600;
}

p {
  color: var(--ink-2);
  line-height: 1.6;
}

.lead {
  font-size: clamp(17px, 2vw, 20px);
  color: var(--ink-2);
  max-width: 560px;
}

.eyebrow {
  display: inline-block;
  font-family: var(--font-ui);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--violet);
  padding: var(--gap-1) var(--gap-3);
  background: var(--surface-3);
  border-radius: var(--radius-pill);
  margin-bottom: var(--gap-4);
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--gap-2);
  padding: 14px 22px;
  border-radius: var(--radius-btn);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.01em;
  transition: transform 160ms ease, box-shadow 160ms ease,
    background 160ms ease;
  white-space: nowrap;
}

.btn-primary {
  background: var(--violet);
  color: white;
  box-shadow: 0 6px 18px rgba(91, 63, 255, 0.32);
}

.btn-primary:hover {
  background: var(--violet-deep);
  transform: translateY(-2px);
  box-shadow: 0 10px 26px rgba(91, 63, 255, 0.4);
  color: white;
}

.btn-ghost {
  background: var(--surface);
  color: var(--ink);
  box-shadow: var(--shadow-card);
}

.btn-ghost:hover {
  background: var(--cream-deep);
  transform: translateY(-2px);
  color: var(--ink);
}

.btn-large {
  padding: 18px 28px;
  font-size: 16px;
}

/* ---------- Header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(12px);
  background: rgba(255, 248, 240, 0.85);
  border-bottom: 1px solid rgba(91, 63, 255, 0.06);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--gap-4) 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--gap-2);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 22px;
  color: var(--ink);
}

.brand:hover {
  color: var(--ink);
}

.brand-mark {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  object-fit: cover;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--gap-5);
}

.nav-links a {
  font-weight: 600;
  font-size: 14px;
  color: var(--ink-2);
}

.nav-links a:hover {
  color: var(--ink);
}

@media (max-width: 760px) {
  .nav-links a:not(.btn) {
    display: none;
  }
}

/* ---------- Hero ---------- */

.hero {
  padding: var(--gap-9) 0 var(--gap-8);
  position: relative;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

.hero-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.45;
}

.hero-blob.one {
  top: -120px;
  right: -100px;
  width: 460px;
  height: 460px;
  background: radial-gradient(circle, var(--lilac), transparent 70%);
}

.hero-blob.two {
  bottom: -180px;
  left: -120px;
  width: 480px;
  height: 480px;
  background: radial-gradient(circle, var(--peach), transparent 70%);
}

.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: var(--gap-8);
  align-items: center;
}

@media (max-width: 900px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: var(--gap-6);
    text-align: center;
  }
  .hero-cta {
    justify-content: center;
  }
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--gap-3);
  margin-top: var(--gap-5);
}

.hero-meta {
  margin-top: var(--gap-5);
  font-size: 13px;
  color: var(--ink-3);
  display: inline-flex;
  align-items: center;
  gap: var(--gap-2);
}

.hero-meta::before {
  content: '✓';
  display: inline-grid;
  place-items: center;
  width: 18px;
  height: 18px;
  background: var(--mint);
  color: white;
  font-size: 11px;
  font-weight: 800;
  border-radius: 999px;
}

.hero-mascot-wrap {
  display: grid;
  place-items: center;
  position: relative;
}

.hero-mascot-halo {
  position: absolute;
  inset: 0;
  background: radial-gradient(
    circle at center,
    rgba(91, 63, 255, 0.18),
    transparent 65%
  );
}

.hero-mascot {
  width: min(360px, 80vw);
  height: auto;
  filter: drop-shadow(var(--shadow-mascot));
  animation: float 5.5s ease-in-out infinite;
}

@keyframes float {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

/* ---------- Features grid ---------- */

.section-head {
  text-align: center;
  margin-bottom: var(--gap-7);
}

.section-head .lead {
  margin: var(--gap-3) auto 0;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--gap-4);
}

@media (max-width: 900px) {
  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 580px) {
  .feature-grid {
    grid-template-columns: 1fr;
  }
}

.feature {
  background: var(--surface);
  border-radius: var(--radius-card);
  padding: var(--gap-5);
  box-shadow: var(--shadow-card);
  transition: transform 200ms ease, box-shadow 200ms ease;
}

.feature:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
}

.feature-icon {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  border-radius: 14px;
  font-size: 22px;
  margin-bottom: var(--gap-3);
}

.feature h3 {
  margin-bottom: var(--gap-2);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 19px;
}

.feature p {
  font-size: 14px;
  color: var(--ink-2);
}

/* tinted icon backgrounds */
.tint-violet {
  background: rgba(91, 63, 255, 0.14);
  color: var(--violet);
}
.tint-coral {
  background: rgba(255, 107, 107, 0.14);
  color: var(--coral);
}
.tint-mint {
  background: rgba(107, 203, 119, 0.18);
  color: var(--mint);
}
.tint-sky {
  background: rgba(77, 150, 255, 0.16);
  color: var(--sky);
}
.tint-sun {
  background: rgba(255, 217, 61, 0.22);
  color: #b08800;
}
.tint-orange {
  background: rgba(255, 140, 66, 0.18);
  color: var(--voca-orange);
}

/* ---------- How it works ---------- */

.how {
  background: linear-gradient(
    180deg,
    var(--cream) 0%,
    var(--cream-deep) 100%
  );
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--gap-5);
}

@media (max-width: 760px) {
  .steps {
    grid-template-columns: 1fr;
  }
}

.step {
  position: relative;
  background: var(--surface);
  padding: var(--gap-5);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
}

.step-num {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 56px;
  color: var(--violet);
  opacity: 0.18;
  line-height: 1;
  margin-bottom: var(--gap-2);
}

.step h3 {
  font-size: 20px;
  margin-bottom: var(--gap-2);
}

.step p {
  font-size: 14px;
}

/* ---------- Screenshots / phone mockups ---------- */

.phones {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--gap-5);
  align-items: end;
}

@media (max-width: 880px) {
  .phones {
    grid-template-columns: 1fr;
    gap: var(--gap-6);
    justify-items: center;
  }
}

.phone {
  width: 100%;
  max-width: 280px;
  aspect-ratio: 9 / 19.5;
  margin: 0 auto;
  background: var(--ink);
  border-radius: 36px;
  padding: 12px;
  position: relative;
  box-shadow: 0 24px 64px rgba(20, 18, 43, 0.18);
}

.phone-screen {
  width: 100%;
  height: 100%;
  background: var(--cream);
  border-radius: 26px;
  overflow: hidden;
  position: relative;
  display: flex;
  flex-direction: column;
}

.phone-notch {
  position: absolute;
  top: 18px;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 22px;
  background: var(--ink);
  border-radius: 999px;
  z-index: 2;
}

/* phone screen 1 — flashcard */
.screen-flashcard {
  padding: 60px 18px 18px;
  background: linear-gradient(180deg, var(--cream), var(--cream-deep));
  display: flex;
  flex-direction: column;
}

.eyebrow-mini {
  font-family: var(--font-ui);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--violet);
  margin-bottom: 6px;
}

.fc-card {
  background: var(--surface);
  border-radius: 20px;
  padding: 20px;
  box-shadow: var(--shadow-card);
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 8px;
}

.fc-word {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 28px;
  color: var(--ink);
}

.fc-pron {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-3);
}

.fc-translate {
  font-size: 14px;
  color: var(--ink-2);
}

.fc-actions {
  display: flex;
  gap: 8px;
  margin-top: 16px;
}

.fc-action {
  flex: 1;
  padding: 10px;
  border-radius: 14px;
  text-align: center;
  font-size: 12px;
  font-weight: 700;
}

.fc-no {
  background: rgba(239, 68, 68, 0.12);
  color: var(--danger);
}

.fc-yes {
  background: rgba(107, 203, 119, 0.16);
  color: #1f8a3a;
}

/* phone screen 2 — Block Blast */
.screen-blast {
  padding: 60px 16px 16px;
  display: flex;
  flex-direction: column;
}

.blast-hud {
  display: flex;
  gap: 6px;
  align-items: center;
  margin-bottom: 12px;
}

.blast-score {
  background: var(--surface);
  border-radius: 999px;
  padding: 4px 10px;
  font-weight: 800;
  font-size: 12px;
  color: var(--ink);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.06);
}

.blast-board {
  background: linear-gradient(
    135deg,
    rgba(91, 63, 255, 0.22),
    rgba(91, 63, 255, 0.4)
  );
  border: 2px solid rgba(91, 63, 255, 0.45);
  border-radius: 18px;
  padding: 6px;
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: 2px;
  aspect-ratio: 1;
}

.blast-cell {
  border-radius: 6px;
  background: rgba(91, 63, 255, 0.08);
  aspect-ratio: 1;
}

.blast-cell.b-violet {
  background: linear-gradient(180deg, #8a73ff, var(--violet) 50%, #4a32d9);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.18);
  display: grid;
  place-items: center;
  color: white;
  font-weight: 900;
  font-size: 9px;
  text-shadow: 0 1px 1px rgba(0, 0, 0, 0.4);
}

.blast-cell.b-coral {
  background: linear-gradient(180deg, #ff9595, var(--coral) 50%, #d94a4a);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.18);
  display: grid;
  place-items: center;
  color: white;
  font-weight: 900;
  font-size: 9px;
  text-shadow: 0 1px 1px rgba(0, 0, 0, 0.4);
}

.blast-cell.b-sun {
  background: linear-gradient(180deg, #ffe78d, var(--sun) 50%, #d9b400);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.18);
  display: grid;
  place-items: center;
  color: white;
  font-weight: 900;
  font-size: 9px;
  text-shadow: 0 1px 1px rgba(0, 0, 0, 0.4);
}

/* phone screen 3 — AI tutor */
.screen-ai {
  padding: 60px 14px 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.ai-bubble {
  padding: 10px 12px;
  border-radius: 16px;
  font-size: 12px;
  line-height: 1.4;
  max-width: 80%;
}

.ai-bubble.from-user {
  align-self: flex-end;
  background: var(--violet);
  color: white;
  border-bottom-right-radius: 4px;
}

.ai-bubble.from-ai {
  align-self: flex-start;
  background: var(--surface);
  color: var(--ink);
  border-bottom-left-radius: 4px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.ai-bubble.from-ai b {
  color: var(--violet);
}

/* ---------- Why pillars ---------- */

.pillars {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--gap-4);
}

@media (max-width: 700px) {
  .pillars {
    grid-template-columns: 1fr;
  }
}

.pillar {
  background: var(--surface);
  border-radius: var(--radius-card);
  padding: var(--gap-5);
  box-shadow: var(--shadow-card);
  display: flex;
  gap: var(--gap-4);
  align-items: flex-start;
}

.pillar-icon {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  font-size: 22px;
}

.pillar h3 {
  font-size: 18px;
  margin-bottom: var(--gap-1);
}

.pillar p {
  font-size: 14px;
}

/* ---------- Pricing ---------- */

.pricing {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--gap-4);
}

@media (max-width: 720px) {
  .pricing {
    grid-template-columns: 1fr;
  }
}

.plan {
  background: var(--surface);
  border-radius: var(--radius-card);
  padding: var(--gap-6);
  box-shadow: var(--shadow-card);
  position: relative;
}

.plan.featured {
  background: linear-gradient(
    160deg,
    var(--violet) 0%,
    var(--violet-light) 100%
  );
  color: white;
}

.plan.featured h3,
.plan.featured .price,
.plan.featured li {
  color: white;
}

.plan.featured p,
.plan.featured ul {
  color: rgba(255, 255, 255, 0.92);
}

.plan h3 {
  margin-bottom: var(--gap-2);
}

.price {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 40px;
  letter-spacing: -0.03em;
  margin-bottom: var(--gap-1);
}

.price-cycle {
  font-family: var(--font-ui);
  font-weight: 600;
  font-size: 16px;
  color: var(--ink-3);
  margin-left: var(--gap-1);
}

.plan.featured .price-cycle {
  color: rgba(255, 255, 255, 0.78);
}

.plan ul {
  list-style: none;
  margin-top: var(--gap-4);
  display: flex;
  flex-direction: column;
  gap: var(--gap-3);
}

.plan li {
  font-size: 14px;
  display: flex;
  align-items: flex-start;
  gap: var(--gap-2);
}

.plan li::before {
  content: '✓';
  flex-shrink: 0;
  color: var(--mint);
  font-weight: 800;
}

.plan.featured li::before {
  color: white;
}

.plan-badge {
  position: absolute;
  top: -12px;
  right: 22px;
  background: var(--sun);
  color: var(--ink);
  font-weight: 800;
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 999px;
}

/* ---------- CTA banner ---------- */

.cta-banner {
  background: linear-gradient(
    140deg,
    var(--violet) 0%,
    var(--violet-light) 60%,
    var(--coral) 130%
  );
  border-radius: 36px;
  padding: var(--gap-7) var(--gap-6);
  text-align: center;
  color: white;
  position: relative;
  overflow: hidden;
}

.cta-banner h2,
.cta-banner p {
  color: white;
}

.cta-banner h2 {
  margin-bottom: var(--gap-3);
}

.cta-banner p {
  max-width: 540px;
  margin: 0 auto var(--gap-5);
}

.cta-banner .btn-ghost {
  color: var(--violet);
}

.cta-banner .btn-ghost:hover {
  color: var(--violet-deep);
}

.cta-banner-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  opacity: 0.6;
}

.cta-banner-blob.one {
  top: -120px;
  left: -80px;
  width: 320px;
  height: 320px;
  background: var(--lilac);
}

.cta-banner-blob.two {
  bottom: -160px;
  right: -100px;
  width: 360px;
  height: 360px;
  background: var(--coral);
}

.cta-content {
  position: relative;
  z-index: 1;
}

/* ---------- Footer ---------- */

.site-footer {
  padding: var(--gap-7) 0 var(--gap-5);
  border-top: 1px solid rgba(91, 63, 255, 0.08);
  background: var(--cream-deep);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: var(--gap-5);
  align-items: flex-start;
}

@media (max-width: 720px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.footer-col h4 {
  font-family: var(--font-ui);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin-bottom: var(--gap-3);
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-col a {
  font-size: 14px;
  color: var(--ink-2);
}

.footer-col a:hover {
  color: var(--violet);
}

.footer-tagline {
  font-size: 14px;
  color: var(--ink-2);
  margin-top: var(--gap-2);
  max-width: 260px;
}

.footer-bottom {
  margin-top: var(--gap-6);
  padding-top: var(--gap-4);
  border-top: 1px solid rgba(91, 63, 255, 0.08);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--gap-3);
  font-size: 13px;
  color: var(--ink-3);
}

/* ---------- Long-form pages (privacy / terms) ---------- */

.legal {
  padding: var(--gap-7) 0;
}

.legal-content {
  max-width: 760px;
  margin: 0 auto;
  background: var(--surface);
  border-radius: var(--radius-card);
  padding: var(--gap-7) var(--gap-6);
  box-shadow: var(--shadow-card);
}

.legal-content h1 {
  font-size: clamp(28px, 4vw, 40px);
  margin-bottom: var(--gap-2);
}

.legal-content .updated {
  font-size: 13px;
  color: var(--ink-3);
  margin-bottom: var(--gap-6);
}

.legal-content h2 {
  font-size: 22px;
  margin: var(--gap-6) 0 var(--gap-3);
}

.legal-content h3 {
  font-size: 17px;
  margin: var(--gap-5) 0 var(--gap-2);
}

.legal-content p,
.legal-content li {
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink-2);
}

.legal-content p {
  margin-bottom: var(--gap-3);
}

.legal-content ul,
.legal-content ol {
  margin-left: var(--gap-5);
  margin-bottom: var(--gap-3);
}

.legal-content li {
  margin-bottom: var(--gap-2);
}

.legal-content strong {
  color: var(--ink);
}

/* ---------- Utilities ---------- */

.sr-only {
  position: absolute;
  left: -9999px;
}

.text-center {
  text-align: center;
}