/* ── TOKENS ──────────────────────────────────────────────────────────────── */
:root, [data-theme='light'] {
  --color-bg: #f7f6f2;
  --color-surface: #f9f8f5;
  --color-surface-2: #f0efea;
  --color-border: #d4d1ca;
  --color-text: #28251d;
  --color-text-muted: #7a7974;
  --color-text-faint: #bab9b4;
  --color-primary: #01696f;
  --color-primary-hover: #0c4e54;
  --color-primary-highlight: #d4ecea;

  --font-display: 'DM Serif Display', Georgia, serif;
  --font-body: 'DM Sans', 'Helvetica Neue', sans-serif;

  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.75vw, 1.5rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);
  --text-2xl: clamp(2rem, 1.2rem + 2.5vw, 3.5rem);
  --text-hero: clamp(2.5rem, 1rem + 5vw, 5.5rem);

  --space-1: 0.25rem; --space-2: 0.5rem; --space-3: 0.75rem;
  --space-4: 1rem; --space-5: 1.25rem; --space-6: 1.5rem;
  --space-8: 2rem; --space-10: 2.5rem; --space-12: 3rem;
  --space-16: 4rem; --space-20: 5rem; --space-24: 6rem;

  --radius-sm: 0.375rem; --radius-md: 0.625rem;
  --radius-lg: 1rem; --radius-xl: 1.5rem; --radius-full: 9999px;

  --shadow-sm: 0 1px 3px rgba(40,37,29,.06);
  --shadow-md: 0 4px 16px rgba(40,37,29,.08);
  --shadow-lg: 0 12px 40px rgba(40,37,29,.12);

  --content-narrow: 680px;
  --content-default: 1000px;
  --content-wide: 1200px;
  --transition: 180ms cubic-bezier(0.16, 1, 0.3, 1);
}

[data-theme='dark'] {
  --color-bg: #171614;
  --color-surface: #1c1b19;
  --color-surface-2: #222120;
  --color-border: #393836;
  --color-text: #cdccca;
  --color-text-muted: #797876;
  --color-text-faint: #5a5957;
  --color-primary: #4f98a3;
  --color-primary-hover: #6db4be;
  --color-primary-highlight: #1f3335;
  --shadow-sm: 0 1px 3px rgba(0,0,0,.2);
  --shadow-md: 0 4px 16px rgba(0,0,0,.3);
  --shadow-lg: 0 12px 40px rgba(0,0,0,.4);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg: #171614; --color-surface: #1c1b19;
    --color-surface-2: #222120; --color-border: #393836;
    --color-text: #cdccca; --color-text-muted: #797876;
    --color-text-faint: #5a5957; --color-primary: #4f98a3;
    --color-primary-hover: #6db4be; --color-primary-highlight: #1f3335;
  }
}

/* ── BASE ────────────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 5rem; -webkit-font-smoothing: antialiased; }
body { font-family: var(--font-body); font-size: var(--text-base); color: var(--color-text); background: var(--color-bg); line-height: 1.65; min-height: 100dvh; }
img, svg { display: block; max-width: 100%; }
h1,h2,h3,h4 { text-wrap: balance; line-height: 1.15; font-family: var(--font-body); }
p, li { text-wrap: pretty; }
a { color: var(--color-primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-primary-hover); }
::selection { background: var(--color-primary-highlight); }
:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 3px; border-radius: var(--radius-sm); }
button { cursor: pointer; background: none; border: none; font: inherit; color: inherit; }

/* ── LAYOUT ──────────────────────────────────────────────────────────────── */
.container { max-width: var(--content-wide); margin-inline: auto; padding-inline: clamp(var(--space-4), 5vw, var(--space-10)); }
.container--narrow { max-width: var(--content-narrow); }

/* ── NAV ─────────────────────────────────────────────────────────────────── */
.nav { position: sticky; top: 0; z-index: 100; background: color-mix(in oklab, var(--color-bg) 90%, transparent); backdrop-filter: blur(16px); border-bottom: 1px solid var(--color-border); transition: box-shadow var(--transition); }
.nav-inner { max-width: var(--content-wide); margin-inline: auto; padding-inline: clamp(var(--space-4), 5vw, var(--space-10)); height: 64px; display: flex; align-items: center; gap: var(--space-6); }
.logo { display: flex; align-items: center; gap: var(--space-2); text-decoration: none; flex-shrink: 0; }
.logo-text { font-weight: 600; font-size: var(--text-base); color: var(--color-text); letter-spacing: -0.01em; }
.nav-links { display: flex; gap: var(--space-6); margin-left: var(--space-4); }
.nav-links a { font-size: var(--text-sm); color: var(--color-text-muted); font-weight: 500; transition: color var(--transition); }
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--color-primary); }
.nav-actions { display: flex; align-items: center; gap: var(--space-3); margin-left: auto; }
.theme-btn { width: 36px; height: 36px; border-radius: var(--radius-full); display: flex; align-items: center; justify-content: center; color: var(--color-text-muted); transition: background var(--transition), color var(--transition); }
.theme-btn:hover { background: var(--color-surface-2); color: var(--color-text); }
.hamburger { display: none; flex-direction: column; gap: 5px; padding: var(--space-2); margin-left: auto; }
.hamburger span { display: block; width: 22px; height: 2px; background: var(--color-text); border-radius: 2px; transition: all var(--transition); }
.mobile-menu { display: none; flex-direction: column; padding: var(--space-4) clamp(var(--space-4), 5vw, var(--space-10)) var(--space-6); gap: var(--space-3); border-top: 1px solid var(--color-border); background: var(--color-bg); }
.mobile-menu.open { display: flex; }
.mobile-menu a { font-size: var(--text-base); color: var(--color-text-muted); font-weight: 500; }

@media (max-width: 700px) {
  .nav-links, .nav-actions .btn { display: none; }
  .hamburger { display: flex; }
}

/* ── BUTTONS ─────────────────────────────────────────────────────────────── */
.btn { display: inline-flex; align-items: center; gap: var(--space-2); padding: 0.6rem 1.25rem; border-radius: var(--radius-full); font-weight: 600; font-size: var(--text-sm); transition: all var(--transition); text-decoration: none; white-space: nowrap; }
.btn-primary { background: var(--color-primary); color: #fff; }
.btn-primary:hover { background: var(--color-primary-hover); color: #fff; transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-ghost { background: transparent; color: var(--color-text-muted); border: 1.5px solid var(--color-border); }
.btn-ghost:hover { border-color: var(--color-primary); color: var(--color-primary); }
.btn-lg { padding: 0.8rem 1.75rem; font-size: var(--text-base); }

/* ── HERO ────────────────────────────────────────────────────────────────── */
.hero { padding-block: clamp(var(--space-12), 8vw, var(--space-24)); overflow: hidden; }
.hero-inner { max-width: var(--content-wide); margin-inline: auto; padding-inline: clamp(var(--space-4), 5vw, var(--space-10)); display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-16); align-items: center; }
.hero-badge { display: inline-flex; align-items: center; gap: var(--space-2); background: var(--color-primary-highlight); color: var(--color-primary); font-size: var(--text-xs); font-weight: 700; letter-spacing: 0.05em; text-transform: uppercase; padding: 0.35rem 0.85rem; border-radius: var(--radius-full); margin-bottom: var(--space-5); }
.hero-heading { font-family: var(--font-display); font-size: var(--text-hero); font-weight: 400; color: var(--color-text); line-height: 1.08; letter-spacing: -0.02em; margin-bottom: var(--space-6); }
.hero-heading em { font-style: italic; color: var(--color-primary); }
.hero-sub { font-size: var(--text-base); color: var(--color-text-muted); line-height: 1.7; margin-bottom: var(--space-8); max-width: 50ch; }
.hero-cta { display: flex; gap: var(--space-3); flex-wrap: wrap; margin-bottom: var(--space-8); }
.hero-social-proof { display: flex; align-items: center; gap: var(--space-3); font-size: var(--text-sm); color: var(--color-text-muted); }
.proof-avatars { display: flex; }
.avatar { width: 28px; height: 28px; border-radius: var(--radius-full); border: 2px solid var(--color-bg); margin-left: -8px; }
.avatar:first-child { margin-left: 0; }

/* Phone mockup */
.hero-visual { position: relative; display: flex; justify-content: center; }
.hero-blob { position: absolute; inset: -20%; background: radial-gradient(ellipse, color-mix(in oklab, var(--color-primary) 12%, transparent), transparent 70%); border-radius: 50%; z-index: 0; }
.phone-mockup { position: relative; z-index: 1; width: 300px; background: var(--color-text); border-radius: 40px; padding: 12px; box-shadow: var(--shadow-lg), 0 0 0 1px rgba(0,0,0,.1); }
.phone-screen { background: var(--color-bg); border-radius: 30px; overflow: hidden; padding: var(--space-5); }
.mock-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: var(--space-5); }
.mock-title { font-weight: 700; font-size: var(--text-sm); color: var(--color-text); }
.mock-score { background: var(--color-primary); color: white; font-size: 11px; font-weight: 700; padding: 3px 10px; border-radius: var(--radius-full); }
.mock-days { display: flex; flex-direction: column; gap: var(--space-2); margin-bottom: var(--space-5); }
.mock-day { display: grid; grid-template-columns: 36px 1fr auto; align-items: center; gap: var(--space-2); padding: var(--space-2) var(--space-3); border-radius: var(--radius-md); background: var(--color-surface); }
.mock-day.active { background: var(--color-primary-highlight); }
.day-label { font-size: 10px; font-weight: 700; color: var(--color-text-muted); }
.mock-day.active .day-label { color: var(--color-primary); }
.day-meal { font-size: 12px; font-weight: 500; color: var(--color-text); }
.day-time { font-size: 10px; color: var(--color-text-faint); }
.mock-cta { width: 100%; background: var(--color-primary); color: white; font-size: 13px; font-weight: 600; padding: var(--space-3); border-radius: var(--radius-md); text-align: center; }

@media (max-width: 800px) {
  .hero-inner { grid-template-columns: 1fr; text-align: center; }
  .hero-sub { max-width: 100%; }
  .hero-cta { justify-content: center; }
  .hero-social-proof { justify-content: center; }
  .hero-visual { margin-top: var(--space-8); }
  .phone-mockup { width: 260px; }
}

/* ── SECTION LABELS & HEADINGS ───────────────────────────────────────────── */
.section-label { display: inline-block; font-size: var(--text-xs); font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--color-primary); margin-bottom: var(--space-4); }
.section-heading { font-size: var(--text-xl); font-family: var(--font-display); font-weight: 400; color: var(--color-text); letter-spacing: -0.02em; margin-bottom: clamp(var(--space-8), 4vw, var(--space-16)); max-width: 22ch; }

/* ── FEATURES ────────────────────────────────────────────────────────────── */
.features { padding-block: clamp(var(--space-12), 8vw, var(--space-24)); background: var(--color-surface); }
.features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-4); }
.feature-card { background: var(--color-bg); border: 1px solid var(--color-border); border-radius: var(--radius-xl); padding: var(--space-6); transition: box-shadow var(--transition), transform var(--transition); }
.feature-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.feature-card--large { grid-column: span 2; }
.feature-card--accent { background: var(--color-primary); border-color: transparent; color: white; }
.feature-card--accent h3, .feature-card--accent p { color: white; }
.feature-card--accent .feature-icon { color: rgba(255,255,255,0.7); }
.feature-icon { color: var(--color-primary); margin-bottom: var(--space-4); }
.feature-card h3 { font-size: var(--text-base); font-weight: 700; margin-bottom: var(--space-2); color: var(--color-text); }
.feature-card p { font-size: var(--text-sm); color: var(--color-text-muted); line-height: 1.65; }
.feature-card--large p { max-width: 55ch; }

@media (max-width: 860px) {
  .features-grid { grid-template-columns: 1fr 1fr; }
  .feature-card--large { grid-column: span 2; }
}
@media (max-width: 560px) {
  .features-grid { grid-template-columns: 1fr; }
  .feature-card--large { grid-column: span 1; }
}

/* ── HOW IT WORKS ────────────────────────────────────────────────────────── */
.how { padding-block: clamp(var(--space-12), 8vw, var(--space-24)); }
.steps { display: flex; flex-direction: column; gap: 0; max-width: 640px; }
.step { display: grid; grid-template-columns: 64px 1fr; gap: var(--space-6); align-items: start; }
.step-number { font-family: var(--font-display); font-size: var(--text-xl); color: var(--color-primary); opacity: 0.3; font-style: italic; line-height: 1; padding-top: 2px; }
.step-content h3 { font-size: var(--text-base); font-weight: 700; color: var(--color-text); margin-bottom: var(--space-2); }
.step-content p { font-size: var(--text-sm); color: var(--color-text-muted); line-height: 1.7; }
.step-divider { width: 1px; height: var(--space-8); background: var(--color-border); margin-left: 31px; }

/* ── DIETS ───────────────────────────────────────────────────────────────── */
.diets { padding-block: clamp(var(--space-12), 8vw, var(--space-20)); background: var(--color-surface); }
.diets-inner { max-width: var(--content-wide); margin-inline: auto; padding-inline: clamp(var(--space-4), 5vw, var(--space-10)); display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-16); align-items: center; }
.diets-text h2 { font-family: var(--font-display); font-size: var(--text-xl); font-weight: 400; letter-spacing: -0.02em; margin-bottom: var(--space-4); }
.diets-text p { font-size: var(--text-base); color: var(--color-text-muted); line-height: 1.7; }
.diets-tags { display: flex; flex-wrap: wrap; gap: var(--space-2); }
.diet-tag { padding: 0.45rem 1rem; border-radius: var(--radius-full); font-size: var(--text-sm); font-weight: 500; background: var(--color-bg); border: 1.5px solid var(--color-border); color: var(--color-text-muted); transition: all var(--transition); }
.diet-tag--active { background: var(--color-primary); border-color: var(--color-primary); color: white; }

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

/* ── DOWNLOAD ────────────────────────────────────────────────────────────── */
.download { padding-block: clamp(var(--space-16), 10vw, var(--space-24)); }
.download-inner { background: var(--color-primary); border-radius: var(--radius-xl); padding: clamp(var(--space-10), 6vw, var(--space-20)); text-align: center; }
.download-inner h2 { font-family: var(--font-display); font-size: var(--text-2xl); font-weight: 400; color: white; letter-spacing: -0.02em; margin-bottom: var(--space-3); }
.download-inner > p { color: rgba(255,255,255,0.75); margin-bottom: var(--space-8); font-size: var(--text-base); }
.download-inner .btn-primary { background: white; color: var(--color-primary); font-size: var(--text-base); margin: auto; }
.download-inner .btn-primary:hover { background: var(--color-bg); }
.download-note { margin-top: var(--space-4); font-size: var(--text-xs); color: rgba(255,255,255,0.5); }

/* ── FOOTER ──────────────────────────────────────────────────────────────── */
.footer { border-top: 1px solid var(--color-border); padding-block: var(--space-8); }
.footer-inner { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: var(--space-4); padding-bottom: var(--space-6); border-bottom: 1px solid var(--color-border); margin-bottom: var(--space-4); }
.footer-brand p { font-size: var(--text-sm); color: var(--color-text-muted); margin-top: var(--space-2); }
.footer-links { display: flex; gap: var(--space-6); }
.footer-links a { font-size: var(--text-sm); color: var(--color-text-muted); transition: color var(--transition); }
.footer-links a:hover { color: var(--color-primary); }
.footer-bottom p { font-size: var(--text-xs); color: var(--color-text-faint); }

/* ── PROSE PAGES (privacy, support) ─────────────────────────────────────── */
.prose-page { padding-block: clamp(var(--space-10), 6vw, var(--space-20)); }
.page-header { margin-bottom: var(--space-10); padding-bottom: var(--space-8); border-bottom: 1px solid var(--color-border); }
.page-header h1 { font-family: var(--font-display); font-size: var(--text-2xl); font-weight: 400; letter-spacing: -0.02em; margin-bottom: var(--space-3); }
.page-meta { font-size: var(--text-sm); color: var(--color-text-muted); }
.lead { font-size: var(--text-lg); color: var(--color-text); line-height: 1.6; margin-bottom: var(--space-8); }
.prose h2 { font-size: var(--text-lg); font-weight: 700; color: var(--color-text); margin-top: var(--space-10); margin-bottom: var(--space-3); }
.prose h3 { font-size: var(--text-base); font-weight: 700; color: var(--color-text); margin-top: var(--space-6); margin-bottom: var(--space-2); }
.prose p { font-size: var(--text-base); color: var(--color-text-muted); line-height: 1.75; margin-bottom: var(--space-4); }
.prose ul { margin-left: var(--space-6); margin-bottom: var(--space-4); }
.prose li { font-size: var(--text-base); color: var(--color-text-muted); line-height: 1.75; margin-bottom: var(--space-2); }
.prose a { color: var(--color-primary); text-decoration: underline; text-underline-offset: 3px; }

/* Support contact card */
.support-contact-card { display: flex; gap: var(--space-5); align-items: flex-start; background: var(--color-primary-highlight); border: 1px solid var(--color-primary); border-radius: var(--radius-xl); padding: var(--space-6); margin-bottom: var(--space-10); }
.contact-icon { color: var(--color-primary); flex-shrink: 0; margin-top: 2px; }
.support-contact-card strong { font-size: var(--text-base); font-weight: 700; color: var(--color-text); display: block; }
.support-contact-card p { font-size: var(--text-sm); color: var(--color-text-muted); margin: var(--space-1) 0 0; }

/* FAQ */
.faq-list { display: flex; flex-direction: column; gap: var(--space-2); margin-bottom: var(--space-10); }
.faq-item { border: 1px solid var(--color-border); border-radius: var(--radius-lg); overflow: hidden; }
.faq-item summary { font-size: var(--text-base); font-weight: 600; color: var(--color-text); padding: var(--space-4) var(--space-5); cursor: pointer; display: flex; justify-content: space-between; align-items: center; list-style: none; transition: background var(--transition); }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: '+'; font-size: 1.25rem; color: var(--color-primary); font-weight: 300; flex-shrink: 0; }
.faq-item[open] summary::after { content: '−'; }
.faq-item summary:hover { background: var(--color-surface); }
.faq-item[open] summary { background: var(--color-surface); border-bottom: 1px solid var(--color-border); }
.faq-item p { padding: var(--space-4) var(--space-5); font-size: var(--text-sm); color: var(--color-text-muted); line-height: 1.75; }

/* ── JS-DRIVEN STATES ────────────────────────────────────────────────────── */

/* Nav scroll states */
.nav--scrolled {
  box-shadow: var(--shadow-md);
}
.nav--hidden {
  transform: translateY(-100%);
}

/* Hamburger → X animation */
.hamburger.is-open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.hamburger.is-open span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}
.hamburger.is-open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Scroll-reveal */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.5s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal.is-visible {
  opacity: 1;
  transform: none;
}