/* ========================================
   Sypht Design System — styles.css
   ======================================== */

:root {
  /* Brand */
  --color-accent: #BF7A40;
  --color-on-accent: #1C1410;
  --color-text: #1a1a1a;
  --color-text-secondary: #6b6b6b;
  --color-text-tertiary: #999;
  --color-bg: #fafaf8;

  /* Surfaces */
  --color-surface-base: rgba(0, 0, 0, 0.03);
  --color-surface-card: rgba(0, 0, 0, 0.035);
  --color-surface-chip: rgba(0, 0, 0, 0.04);
  --color-surface-pill: rgba(0, 0, 0, 0.06);

  /* Borders */
  --color-border: rgba(0, 0, 0, 0.06);
  --color-border-strong: rgba(0, 0, 0, 0.12);
  --color-divider: rgba(0, 0, 0, 0.08);

  /* Accent variants */
  --color-accent-bg: rgba(191, 122, 64, 0.08);
  --color-accent-border: rgba(191, 122, 64, 0.20);

  /* Categories */
  --color-sage: #668C61;
  --color-clay: #B86638;
  --color-slate: #59809E;
  --color-plum: #806199;
  --color-terracotta: #B34D40;
  --color-rose: #AD6B73;
  --color-sand: #B89952;
  --color-mineral: #528C85;

  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'SF Pro Text', system-ui, sans-serif;

  /* Spacing */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 14px;
  --radius-pill: 9999px;

  --max-width: 960px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-accent: #D4915C;
    --color-on-accent: #1C1410;
    --color-text: #e8e4e0;
    --color-text-secondary: #a09890;
    --color-text-tertiary: #706860;
    --color-bg: #141210;

    --color-surface-base: rgba(255, 255, 255, 0.03);
    --color-surface-card: rgba(255, 255, 255, 0.04);
    --color-surface-chip: rgba(255, 255, 255, 0.05);
    --color-surface-pill: rgba(255, 255, 255, 0.08);

    --color-border: rgba(255, 255, 255, 0.07);
    --color-border-strong: rgba(255, 255, 255, 0.15);
    --color-divider: rgba(255, 255, 255, 0.10);

    --color-accent-bg: rgba(212, 145, 92, 0.08);
    --color-accent-border: rgba(212, 145, 92, 0.20);

    --color-sage: #8BA888;
    --color-clay: #C97B4B;
    --color-slate: #7B9DB8;
    --color-plum: #9B7EAE;
    --color-terracotta: #C45D4F;
    --color-rose: #C4868C;
    --color-sand: #D4B878;
    --color-mineral: #6FA8A0;
  }
}

/* ========================================
   Reset & Base
   ======================================== */

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

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

body {
  font-family: var(--font-family);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--color-accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

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

/* ========================================
   Layout
   ======================================== */

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

section {
  padding: 80px 0;
}

@media (max-width: 640px) {
  section {
    padding: 56px 0;
  }
}

/* ========================================
   Nav
   ======================================== */

nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(250, 250, 248, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
}

@media (prefers-color-scheme: dark) {
  nav {
    background: rgba(20, 18, 16, 0.85);
  }
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}

.nav-brand {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-text);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.nav-links {
  display: flex;
  gap: 28px;
  list-style: none;
}

.nav-links a {
  color: var(--color-text-secondary);
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  transition: color 0.2s;
}

.nav-links a:hover {
  color: var(--color-accent);
  text-decoration: none;
}

@media (max-width: 640px) {
  .nav-links {
    display: none;
  }
}

/* ========================================
   Hero
   ======================================== */

.hero {
  padding-top: 160px;
  padding-bottom: 80px;
  text-align: center;
}

.hero-icon {
  font-size: 56px;
  margin-bottom: 24px;
  display: inline-block;
}

.hero h1 {
  font-size: 48px;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 16px;
}

.hero h1 span {
  color: var(--color-accent);
}

.hero .tagline {
  font-size: 22px;
  color: var(--color-text-secondary);
  max-width: 520px;
  margin: 0 auto 12px;
  line-height: 1.5;
}

.hero .subtitle {
  font-size: 15px;
  color: var(--color-text-tertiary);
  margin-bottom: 40px;
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--color-accent);
  color: var(--color-on-accent);
  padding: 14px 32px;
  border-radius: var(--radius-md);
  font-size: 16px;
  font-weight: 600;
  text-decoration: none;
  transition: opacity 0.2s;
}

.hero-cta:hover {
  opacity: 0.9;
  text-decoration: none;
}

@media (max-width: 640px) {
  .hero {
    padding-top: 120px;
    padding-bottom: 56px;
  }

  .hero h1 {
    font-size: 36px;
  }

  .hero .tagline {
    font-size: 18px;
  }
}

/* ========================================
   Problem Section
   ======================================== */

.problem {
  background: var(--color-surface-base);
}

.problem-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.problem-card {
  padding: 32px;
  background: var(--color-surface-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.problem-card .icon {
  font-size: 36px;
  margin-bottom: 16px;
  display: inline-block;
}

.problem-card h3 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}

.problem-card p {
  color: var(--color-text-secondary);
  line-height: 1.7;
  font-size: 15px;
}

@media (max-width: 640px) {
  .problem-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
}

/* ========================================
   How It Works
   ======================================== */

.how-it-works {
  text-align: center;
}

.section-title {
  font-size: 36px;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 12px;
}

.section-subtitle {
  font-size: 17px;
  color: var(--color-text-secondary);
  margin-bottom: 56px;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}

.steps {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 40px;
}

.step {
  text-align: center;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--color-accent-bg);
  border: 2px solid var(--color-accent-border);
  color: var(--color-accent);
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 20px;
}

.step h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
}

.step p {
  color: var(--color-text-secondary);
  font-size: 15px;
  line-height: 1.6;
}

@media (max-width: 640px) {
  .steps {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .section-title {
    font-size: 28px;
  }
}

/* ========================================
   Features
   ======================================== */

.features {
  background: var(--color-surface-base);
}

.features-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 20px;
}

.feature-card {
  padding: 28px;
  background: var(--color-surface-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: border-color 0.2s;
}

.feature-card:hover {
  border-color: var(--color-accent-border);
}

.feature-icon {
  font-size: 28px;
  margin-bottom: 14px;
  display: inline-block;
}

.feature-card h3 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 8px;
}

.feature-card p {
  color: var(--color-text-secondary);
  font-size: 14px;
  line-height: 1.6;
}

@media (max-width: 768px) {
  .features-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 480px) {
  .features-grid {
    grid-template-columns: 1fr;
  }
}

/* ========================================
   Pricing
   ======================================== */

.pricing {
  text-align: center;
}

.pricing-card {
  max-width: 400px;
  margin: 0 auto;
  padding: 40px;
  background: var(--color-surface-card);
  border: 2px solid var(--color-accent-border);
  border-radius: var(--radius-lg);
}

.pricing-card .badge {
  display: inline-block;
  background: var(--color-accent-bg);
  color: var(--color-accent);
  padding: 4px 14px;
  border-radius: var(--radius-pill);
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 16px;
}

.pricing-card .price {
  font-size: 48px;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 4px;
}

.pricing-card .price span {
  font-size: 18px;
  font-weight: 500;
  color: var(--color-text-secondary);
}

.pricing-card .price-note {
  color: var(--color-text-tertiary);
  font-size: 14px;
  margin-bottom: 28px;
}

.pricing-features {
  list-style: none;
  text-align: left;
  margin-bottom: 32px;
}

.pricing-features li {
  padding: 10px 0;
  font-size: 15px;
  display: flex;
  align-items: center;
  gap: 10px;
  border-bottom: 1px solid var(--color-divider);
}

.pricing-features li:last-child {
  border-bottom: none;
}

.pricing-features .check {
  color: var(--color-accent);
  font-weight: 700;
  font-size: 16px;
}

.pricing-cta {
  display: block;
  width: 100%;
  padding: 14px;
  background: var(--color-accent);
  color: var(--color-on-accent);
  border: none;
  border-radius: var(--radius-md);
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  text-align: center;
  text-decoration: none;
  transition: opacity 0.2s;
}

.pricing-cta:hover {
  opacity: 0.9;
  text-decoration: none;
}

/* ========================================
   Footer
   ======================================== */

footer {
  padding: 40px 0;
  border-top: 1px solid var(--color-divider);
  text-align: center;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin-bottom: 16px;
}

.footer-links a {
  color: var(--color-text-secondary);
  font-size: 14px;
}

.footer-credit {
  color: var(--color-text-tertiary);
  font-size: 13px;
}

/* ========================================
   Privacy Policy Page
   ======================================== */

.legal {
  padding-top: 120px;
  padding-bottom: 80px;
  max-width: 680px;
  margin: 0 auto;
}

.legal h1 {
  font-size: 32px;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

.legal .last-updated {
  color: var(--color-text-tertiary);
  font-size: 14px;
  margin-bottom: 40px;
}

.legal h2 {
  font-size: 20px;
  font-weight: 700;
  margin-top: 36px;
  margin-bottom: 12px;
}

.legal p, .legal ul {
  color: var(--color-text-secondary);
  font-size: 15px;
  line-height: 1.8;
  margin-bottom: 16px;
}

.legal ul {
  padding-left: 24px;
}

.legal li {
  margin-bottom: 8px;
}

.legal a {
  color: var(--color-accent);
}