/* ========== DESIGN TOKENS ========== */
:root {
  --navy: #003366;
  --navy-dark: #001f3f;
  --navy-light: #004488;
  --blue-accent: #4da6ff;
  --blue-soft: #e8f4fd;
  --teal: #0d7377;
  --teal-light: #e6f5f5;
  --green: #1a8a4a;
  --green-light: #e6f7ed;
  --amber: #b45309;
  --amber-light: #fef3c7;
  --red: #b91c1c;
  --red-light: #fee2e2;
  --gray-50: #f8f9fc;
  --gray-100: #f0f2f5;
  --gray-200: #e2e5ea;
  --gray-300: #c8ccd4;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;
  --white: #ffffff;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.12);
  --transition: 180ms cubic-bezier(0.16, 1, 0.3, 1);
}

/* ========== PAGE ROUTING ========== */
.page { display: none; }
.page.active { display: block; }

/* ========== BUTTONS ========== */
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 16px; border-radius: var(--radius-md);
  font-weight: 500; font-size: 14px; line-height: 1.4;
  transition: all var(--transition); white-space: nowrap; border: none;
}
.btn-sm { padding: 6px 12px; font-size: 13px; }
.btn-lg { padding: 12px 24px; font-size: 15px; }
.btn-full { width: 100%; justify-content: center; }
.btn-primary { background: var(--navy); color: var(--white); }
.btn-primary:hover { background: var(--navy-light); }
.btn-outline { background: transparent; border: 1.5px solid var(--gray-300); color: var(--gray-700); }
.btn-outline:hover { border-color: var(--navy); color: var(--navy); }
.btn-ghost { background: transparent; color: var(--gray-600); }
.btn-ghost:hover { background: var(--gray-100); color: var(--gray-800); }
.btn-google {
  width: 100%; justify-content: center; padding: 10px 16px;
  background: var(--white); border: 1.5px solid var(--gray-200); color: var(--gray-700);
  border-radius: var(--radius-md); font-weight: 500;
}
.btn-google:hover { background: var(--gray-50); border-color: var(--gray-300); }
.btn-google svg { display: inline; flex-shrink: 0; }

/* ========== LANDING PAGE ========== */
.landing-nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(248, 249, 252, 0.92); backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--gray-200);
}
.landing-nav-inner {
  max-width: 1200px; margin: 0 auto; padding: 12px 24px;
  display: flex; align-items: center; justify-content: space-between;
}
.logo-mark { display: flex; align-items: center; gap: 10px; }
.logo-text { font-size: 17px; font-weight: 600; color: var(--gray-800); }
.logo-accent { color: var(--navy); }
.landing-nav-links { display: flex; align-items: center; gap: 24px; }
.landing-nav-links a { color: var(--gray-600); font-size: 14px; font-weight: 500; }
.landing-nav-links a:hover { color: var(--navy); text-decoration: none; }
.mobile-menu-btn { display: none; padding: 8px; }

.hero {
  padding: 140px 24px 80px; max-width: 900px; margin: 0 auto; text-align: center;
}
.hero-badge {
  display: inline-block; padding: 6px 14px; margin-bottom: 20px;
  background: var(--blue-soft); color: var(--navy); border-radius: 20px;
  font-size: 13px; font-weight: 600; letter-spacing: 0.02em;
}
.hero h1 {
  font-size: clamp(28px, 4vw, 44px); font-weight: 700; color: var(--navy-dark);
  margin-bottom: 16px; letter-spacing: -0.02em;
}
.hero-subtitle {
  font-size: clamp(15px, 1.5vw, 17px); color: var(--gray-600);
  max-width: 640px; margin: 0 auto 32px; line-height: 1.7;
}
.hero-cta { display: flex; gap: 12px; justify-content: center; margin-bottom: 48px; flex-wrap: wrap; }
.hero-stats { display: flex; gap: 0; justify-content: center; align-items: center; }
.hero-stat { text-align: center; padding: 0 28px; }
.hero-stat-value { display: block; font-size: 20px; font-weight: 700; color: var(--navy); }
.hero-stat-label { display: block; font-size: 12px; color: var(--gray-500); margin-top: 2px; }
.hero-stat-divider { width: 1px; height: 36px; background: var(--gray-200); }

.section { padding: 80px 24px; }
.section-alt { background: var(--white); }
.section-inner { max-width: 1100px; margin: 0 auto; }
.section h2 {
  font-size: clamp(24px, 3vw, 32px); font-weight: 700; color: var(--navy-dark);
  margin-bottom: 12px; text-align: center;
}
.section-desc {
  font-size: 15px; color: var(--gray-600); max-width: 600px;
  margin: 0 auto 40px; text-align: center; line-height: 1.7;
}

.feature-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 24px; }
.feature-card {
  padding: 28px; background: var(--white); border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
}
.feature-icon {
  width: 44px; height: 44px; display: flex; align-items: center; justify-content: center;
  background: var(--blue-soft); border-radius: var(--radius-md); margin-bottom: 16px;
  color: var(--navy);
}
.feature-card h3 { font-size: 16px; font-weight: 600; margin-bottom: 8px; color: var(--gray-800); }
.feature-card p { font-size: 14px; color: var(--gray-600); line-height: 1.6; }

.steps-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 20px; }
.step-card {
  padding: 24px; background: var(--gray-50); border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg); text-align: center;
}
.step-number {
  width: 36px; height: 36px; display: flex; align-items: center; justify-content: center;
  background: var(--navy); color: var(--white); border-radius: 50%;
  font-weight: 700; font-size: 15px; margin: 0 auto 12px;
}
.step-card h3 { font-size: 15px; font-weight: 600; margin-bottom: 8px; color: var(--gray-800); }
.step-card p { font-size: 13px; color: var(--gray-600); line-height: 1.6; }

.guidelines-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 12px;
}
.guideline-card {
  padding: 16px; background: var(--white); border: 1px solid var(--gray-200);
  border-radius: var(--radius-md); font-size: 14px; font-weight: 500;
  color: var(--gray-700); display: flex; align-items: center; gap: 10px;
}
.guideline-tag {
  display: inline-block; padding: 2px 8px; background: var(--navy); color: var(--white);
  border-radius: 4px; font-size: 11px; font-weight: 700; letter-spacing: 0.03em;
}

.landing-footer {
  padding: 24px; border-top: 1px solid var(--gray-200); background: var(--white);
}
.landing-footer-inner {
  max-width: 1100px; margin: 0 auto; display: flex;
  justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px;
}
.landing-footer p { font-size: 13px; color: var(--gray-500); }
.landing-footer a { font-size: 12px; color: var(--gray-400); }

/* ========== AUTH PAGE ========== */
.auth-container {
  min-height: 100dvh; display: flex; align-items: center; justify-content: center;
  padding: 24px; background: var(--gray-50);
}
.auth-card {
  width: 100%; max-width: 400px; background: var(--white);
  border: 1px solid var(--gray-200); border-radius: var(--radius-lg);
  padding: 32px; box-shadow: var(--shadow-md);
}
.auth-header { text-align: center; margin-bottom: 24px; }
.auth-header .logo-mark { justify-content: center; margin-bottom: 12px; }
.auth-subtitle { font-size: 14px; color: var(--gray-500); }
.auth-tabs { display: flex; gap: 0; margin-bottom: 20px; border-bottom: 1px solid var(--gray-200); }
.auth-tab {
  flex: 1; padding: 10px; font-size: 14px; font-weight: 500;
  color: var(--gray-500); border-bottom: 2px solid transparent; text-align: center;
  transition: all var(--transition);
}
.auth-tab.active { color: var(--navy); border-bottom-color: var(--navy); }
.auth-divider {
  display: flex; align-items: center; gap: 12px; margin: 16px 0;
  color: var(--gray-400); font-size: 12px;
}
.auth-divider::before, .auth-divider::after {
  content: ''; flex: 1; height: 1px; background: var(--gray-200);
}
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 13px; font-weight: 500; color: var(--gray-700); margin-bottom: 4px; }
.form-group input {
  width: 100%; padding: 10px 12px; border: 1.5px solid var(--gray-200);
  border-radius: var(--radius-md); font-size: 14px; background: var(--white);
  transition: border-color var(--transition);
}
.form-group input:focus { border-color: var(--navy); outline: none; }
.form-hint { font-size: 12px; color: var(--gray-400); margin-top: 4px; display: block; }
.form-error {
  padding: 8px 12px; background: var(--red-light); color: var(--red);
  border-radius: var(--radius-sm); font-size: 13px; margin-bottom: 12px;
}
.auth-back {
  display: block; margin-top: 20px; text-align: center; font-size: 13px;
  color: var(--gray-500); width: 100%;
}
.auth-back:hover { color: var(--navy); }

/* ========== RESPONSIVE ========== */
@media (max-width: 768px) {
  .landing-nav-links { display: none; }
  .mobile-menu-btn { display: block; }
  .hero-stats { flex-direction: column; gap: 12px; }
  .hero-stat-divider { width: 40px; height: 1px; }
  .landing-footer-inner { flex-direction: column; text-align: center; }
}