/* =============================================
   SIGHTBRIDGE — Premium Design System
   Primary: #004a99 | White: #ffffff
   ============================================= */

/* ---------- RESET & TOKENS ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --blue-900: #002966;
  --blue-800: #003d80;
  --blue-700: #004a99;
  --blue-600: #0060cc;
  --blue-500: #1a80ff;
  --blue-400: #4d9fff;
  --blue-100: #dbeafe;
  --blue-50:  #eff6ff;
  --white:    #ffffff;
  --gray-900: #0f172a;
  --gray-800: #1e293b;
  --gray-700: #334155;
  --gray-600: #475569;
  --gray-400: #94a3b8;
  --gray-200: #e2e8f0;
  --gray-100: #f1f5f9;
  --gray-50:  #f8fafc;
  --cyan:     #06b6d4;
  --gold:     #f59e0b;
  --shadow-sm:    0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.06);
  --shadow-md:    0 4px 16px rgba(0,0,0,.12);
  --shadow-lg:    0 12px 40px rgba(0,0,0,.16);
  --shadow-xl:    0 24px 64px rgba(0,0,0,.20);
  --shadow-blue:  0 8px 32px rgba(0,74,153,.25);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 999px;
  --nav-h: 72px;
  --transition: 0.28s cubic-bezier(0.4, 0, 0.2, 1);
}

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  color: var(--gray-800);
  background: var(--white);
  overflow-x: hidden;
  line-height: 1.6;
}

img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font: inherit; }

/* ---------- SCROLLBAR ---------- */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--gray-100); }
::-webkit-scrollbar-thumb { background: var(--blue-600); border-radius: var(--radius-full); }

/* ---------- CONTAINER ---------- */
.container { max-width: 1200px; margin: 0 auto; padding: 0 5%; }

/* ---------- NAVIGATION ---------- */
.navbar {
  position: fixed; top: 0; left: 0; right: 0;
  height: var(--nav-h);
  z-index: 1000;
  background: rgba(0, 42, 100, 0.85);
  -webkit-backdrop-filter: blur(20px) saturate(1.8);
  backdrop-filter: blur(20px) saturate(1.8);
  border-bottom: 1px solid rgba(255,255,255,0.08);
  transition: background var(--transition), box-shadow var(--transition);
}
.navbar.scrolled {
  background: rgba(0, 42, 100, 0.97);
  box-shadow: 0 4px 24px rgba(0, 42, 100, 0.35);
}
.nav-container {
  height: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 5%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Logo */
.logo { display: flex; align-items: center; gap: 10px; }
.logo-icon { width: 38px; height: 38px; flex-shrink: 0; }
.logo-text {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--white);
  letter-spacing: -0.02em;
}
.logo-icon-sm { width: 32px; height: 32px; }
.logo-text-dark { color: var(--gray-900); }

/* Real logo image */
.logo-img-wrap { display: flex; align-items: center; gap: 0; }
.logo-img {
  height: 48px;
  width: auto;
  object-fit: contain;
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 4px 10px;
  display: block;
}
.logo-img-footer {
  height: 56px;
  padding: 6px 12px;
}

/* Nav links */
nav ul { display: flex; align-items: center; gap: 2rem; }
.nav-link {
  color: rgba(255,255,255,0.82);
  font-size: .92rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  transition: color var(--transition);
  position: relative;
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: -3px; left: 0; right: 100%;
  height: 2px;
  background: var(--blue-400);
  border-radius: var(--radius-full);
  transition: right var(--transition);
}
.nav-link:hover { color: var(--white); }
.nav-link:hover::after { right: 0; }

.nav-cta {
  background: var(--blue-500);
  color: var(--white);
  padding: 9px 22px;
  border-radius: var(--radius-full);
  font-size: .92rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 2px 12px rgba(26,128,255,0.4);
}
.nav-cta:hover {
  background: var(--blue-600);
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(26,128,255,0.5);
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
}
.hamburger span {
  display: block;
  width: 24px; height: 2px;
  background: var(--white);
  border-radius: var(--radius-full);
  transition: var(--transition);
}
.hamburger.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.active span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.hamburger.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- BUTTONS ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--radius-full);
  font-weight: 700;
  font-size: .95rem;
  letter-spacing: 0.01em;
  transition: all var(--transition);
  cursor: pointer;
  text-decoration: none;
}
.btn-primary {
  background: var(--white);
  color: var(--blue-700);
  box-shadow: 0 4px 20px rgba(255,255,255,.25);
}
.btn-primary:hover {
  background: var(--blue-50);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(255,255,255,.35);
}
.btn-ghost {
  background: transparent;
  color: var(--white);
  border: 2px solid rgba(255,255,255,0.5);
}
.btn-ghost:hover {
  background: rgba(255,255,255,0.12);
  border-color: var(--white);
  transform: translateY(-2px);
}
.btn-primary-dark {
  background: var(--blue-700);
  color: var(--white);
  box-shadow: var(--shadow-blue);
}
.btn-primary-dark:hover {
  background: var(--blue-800);
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(0,74,153,0.35);
}
.btn-tier {
  background: var(--blue-50);
  color: var(--blue-700);
  border: 2px solid var(--blue-100);
  font-size: .88rem;
  padding: 10px 20px;
  width: 100%;
  justify-content: center;
}
.btn-tier:hover {
  background: var(--blue-700);
  color: var(--white);
  border-color: var(--blue-700);
  transform: translateY(-2px);
}
.btn-tier-featured {
  background: var(--blue-700);
  color: var(--white);
  font-size: .88rem;
  padding: 10px 20px;
  width: 100%;
  justify-content: center;
  box-shadow: var(--shadow-blue);
}
.btn-tier-featured:hover {
  background: var(--blue-800);
  transform: translateY(-2px);
}
.btn-tier-global {
  background: linear-gradient(135deg, #0f172a, #1e3a5f);
  color: var(--white);
  font-size: .88rem;
  padding: 10px 20px;
  width: 100%;
  justify-content: center;
  border: 1px solid rgba(255,255,255,0.15);
}
.btn-tier-global:hover {
  background: linear-gradient(135deg, #1e3a5f, #004a99);
  transform: translateY(-2px);
}
.btn-full { width: 100%; justify-content: center; }

/* ---------- SECTION SHARED ---------- */
.section { padding: 100px 0; }
.section-tag {
  display: inline-block;
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--blue-600);
  background: var(--blue-50);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  border: 1px solid var(--blue-100);
  margin-bottom: 1.5rem;
}
.section-tag.light {
  color: var(--blue-100);
  background: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.2);
}
.section-title {
  font-family: 'DM Serif Display', Georgia, serif;
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.15;
  color: var(--gray-900);
  margin-bottom: 1.5rem;
  letter-spacing: -0.02em;
}
.section-title.light { color: var(--white); }
.section-title em { color: var(--blue-700); font-style: italic; }
.section-title.light em { color: var(--blue-300, #93c5fd); }
.section-title.centered { text-align: center; }
.section-sub {
  font-size: 1.1rem;
  color: var(--gray-600);
  max-width: 640px;
  margin-bottom: 3rem;
}
.section-sub.centered { text-align: center; margin-left: auto; margin-right: auto; }
.lead-text {
  font-size: 1.15rem;
  color: var(--gray-700);
  font-weight: 500;
  margin-bottom: 1.25rem;
  line-height: 1.65;
}

/* ---------- HERO ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--nav-h);
  overflow: hidden;
  background: var(--gray-900);
}

.hero-bg {
  position: absolute;
  inset: 0;
}
.hero-bus-img {
  width: 100%; height: 100%;
  object-fit: cover;
  object-position: center 60%;
  opacity: 0.45;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(0, 41, 102, 0.92) 0%,
    rgba(0, 74, 153, 0.78) 40%,
    rgba(0, 30, 80, 0.70) 100%
  );
}

/* Particles */
.particles { position: absolute; inset: 0; pointer-events: none; }
.particle {
  position: absolute;
  border-radius: 50%;
  background: rgba(255,255,255,.08);
  animation: float 10s infinite ease-in-out;
}
.p1 { width: 300px; height: 300px; top: -80px; right: -60px; animation-delay: 0s; }
.p2 { width: 200px; height: 200px; bottom: 10%; left: -40px; animation-delay: 2s; }
.p3 { width: 120px; height: 120px; top: 30%; right: 20%; animation-delay: 4s; background: rgba(26,128,255,.12); }
.p4 { width: 80px; height: 80px; bottom: 20%; right: 10%; animation-delay: 1s; }
.p5 { width: 60px; height: 60px; top: 20%; left: 25%; animation-delay: 3s; }
.p6 { width: 180px; height: 180px; bottom: -40px; right: 30%; animation-delay: 5s; background: rgba(6,182,212,.08); }

@keyframes float {
  0%, 100% { transform: translateY(0) scale(1); }
  50% { transform: translateY(-28px) scale(1.04); }
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 5%;
  color: var(--white);
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: .82rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255,255,255,.75);
  background: rgba(255,255,255,.1);
  border: 1px solid rgba(255,255,255,.2);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-full);
  padding: 7px 16px;
  margin-bottom: 1.75rem;
  animation: fadeDown .8s ease both;
}
.badge-dot {
  width: 7px; height: 7px;
  background: var(--cyan);
  border-radius: 50%;
  animation: pulse-dot 2s ease-in-out infinite;
  box-shadow: 0 0 0 0 rgba(6,182,212,0.4);
}
@keyframes pulse-dot {
  0%, 100% { box-shadow: 0 0 0 0 rgba(6,182,212,0.4); }
  50% { box-shadow: 0 0 0 6px rgba(6,182,212,0); }
}

.hero-headline {
  font-family: 'DM Serif Display', Georgia, serif;
  font-size: clamp(2.8rem, 6vw, 5rem);
  line-height: 1.08;
  letter-spacing: -0.025em;
  margin-bottom: 1.5rem;
  max-width: 820px;
  animation: fadeUp .9s .15s ease both;
}
.hero-headline em {
  font-style: italic;
  color: var(--blue-400);
}

.hero-sub {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: rgba(255,255,255,.82);
  max-width: 600px;
  line-height: 1.7;
  margin-bottom: 2.5rem;
  animation: fadeUp .9s .25s ease both;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 4rem;
  animation: fadeUp .9s .35s ease both;
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 2.5rem;
  animation: fadeUp .9s .45s ease both;
}
.stat-item { display: flex; flex-direction: column; }
.stat-num {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--white);
  line-height: 1;
  letter-spacing: -0.02em;
}
.stat-suffix { font-size: 2.2rem; font-weight: 800; color: var(--white); display: inline; }
.stat-label { font-size: .8rem; color: rgba(255,255,255,.6); font-weight: 500; margin-top: 4px; letter-spacing: 0.04em; }
.stat-divider { width: 1px; height: 40px; background: rgba(255,255,255,.2); }

.hero-scroll-hint {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: rgba(255,255,255,.5);
  font-size: .75rem;
  letter-spacing: 0.06em;
  animation: fadeIn 1.5s 1s ease both;
}
.scroll-mouse {
  width: 22px; height: 34px;
  border: 2px solid rgba(255,255,255,.35);
  border-radius: 11px;
  display: flex;
  justify-content: center;
  padding-top: 5px;
}
.scroll-wheel {
  width: 3px; height: 7px;
  background: rgba(255,255,255,.6);
  border-radius: var(--radius-full);
  animation: scroll-wheel 1.8s ease-in-out infinite;
}
@keyframes scroll-wheel { 0% { transform: translateY(0); opacity: 1; } 100% { transform: translateY(8px); opacity: 0; } }

/* ---------- MISSION ---------- */
.section-mission { background: var(--white); }
.mission-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: center;
}
.mission-text p {
  color: var(--gray-600);
  margin-bottom: 1rem;
  line-height: 1.75;
}
.mission-text .btn { margin-top: 1rem; }

.mission-visual { position: relative; }
.mission-img {
  width: 100%;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  object-fit: cover;
  aspect-ratio: 4/3;
}
.mission-badge-card {
  position: absolute;
  bottom: -24px;
  left: -24px;
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 16px 20px;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 14px;
  max-width: 280px;
  border: 1px solid var(--gray-200);
  animation: fadeUp 1s .5s ease both;
}
.badge-icon { font-size: 2rem; flex-shrink: 0; }
.mission-badge-card strong { font-size: .95rem; color: var(--gray-900); display: block; margin-bottom: 4px; }
.mission-badge-card p { font-size: .8rem; color: var(--gray-600); margin: 0; line-height: 1.5; }

/* ---------- IMPACT COUNTERS ---------- */
.section-impact {
  background: linear-gradient(135deg, var(--blue-700) 0%, var(--blue-900) 100%);
  padding: 60px 0;
}
.impact-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
}
.impact-card {
  text-align: center;
  color: var(--white);
  padding: 2rem 1rem;
  border-radius: var(--radius-lg);
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.12);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
}
.impact-card:hover { transform: translateY(-4px); background: rgba(255,255,255,.14); }
.impact-icon { font-size: 2rem; margin-bottom: .75rem; }
.impact-num {
  font-size: 2.8rem;
  font-weight: 900;
  letter-spacing: -0.03em;
  color: var(--white);
  line-height: 1;
}
.impact-label { font-size: .82rem; color: rgba(255,255,255,.65); margin-top: .5rem; font-weight: 500; }

/* ---------- TECH / INTELLIGENCE HUB ---------- */
.section-tech { background: var(--gray-50); }
.tech-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: center;
}

.tech-features { margin: 2rem 0; display: flex; flex-direction: column; gap: 1.25rem; }
.tech-feature {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 1.1rem 1.25rem;
  border: 1px solid var(--gray-200);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  cursor: default;
}
.tech-feature:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow-md);
  border-color: var(--blue-200, #bfdbfe);
}
.feature-dot {
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--blue-600);
  flex-shrink: 0;
  margin-top: 6px;
  box-shadow: 0 0 0 3px rgba(0,96,204,0.15);
}
.tech-feature strong { font-size: .95rem; color: var(--gray-900); display: block; margin-bottom: 4px; }
.tech-feature p { font-size: .85rem; color: var(--gray-600); margin: 0; line-height: 1.6; }

.tech-badge { display: flex; flex-wrap: wrap; gap: 8px; }
.badge-pill {
  font-size: .76rem;
  font-weight: 600;
  color: var(--blue-700);
  background: var(--blue-50);
  border: 1px solid var(--blue-100);
  padding: 5px 12px;
  border-radius: var(--radius-full);
  letter-spacing: 0.03em;
}

.tech-right { display: flex; justify-content: flex-end; }
.tech-img-frame {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-xl), 0 0 0 1px rgba(0,0,0,0.06);
  max-width: 520px;
}
.tech-img { width: 100%; display: block; }
.tech-img-glow {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent 60%, rgba(0,74,153,0.2));
  pointer-events: none;
}

/* ---------- MOBILE CLINIC ---------- */
.section-clinic { background: var(--white); }
.clinic-showcase { display: flex; flex-direction: column; gap: 3rem; }

.clinic-main-img-wrap {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
}
.clinic-main-img {
  width: 100%;
  height: 480px;
  object-fit: cover;
  object-position: center 55%;
  display: block;
}
.clinic-img-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to right, rgba(0,42,100,.65) 0%, transparent 50%);
  display: flex;
  align-items: flex-end;
  padding: 2rem;
}
.overlay-chip {
  background: rgba(255,255,255,.15);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255,255,255,.25);
  color: var(--white);
  font-size: .82rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 8px 18px;
  border-radius: var(--radius-full);
}

.clinic-features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}
.clinic-feature-card {
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 2rem 1.5rem;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition), border-color var(--transition);
  cursor: default;
}
.clinic-feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  background: var(--white);
  border-color: var(--blue-200, #bfdbfe);
}
.cf-icon { font-size: 2rem; margin-bottom: 1rem; }
.clinic-feature-card h3 { font-size: 1rem; font-weight: 700; color: var(--gray-900); margin-bottom: .5rem; }
.clinic-feature-card p { font-size: .88rem; color: var(--gray-600); line-height: 1.65; }

/* ---------- GLOBAL EXPANSION ---------- */
.section-global {
  background: linear-gradient(135deg, #0a1628 0%, #0e2040 40%, #0a1f3d 100%);
  position: relative;
  overflow: hidden;
}
.global-bg-overlay {
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle at 20% 50%, rgba(0,74,153,0.25) 0%, transparent 50%),
                    radial-gradient(circle at 80% 80%, rgba(6,182,212,0.1) 0%, transparent 40%);
  pointer-events: none;
}
.global-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: center;
}
.global-img {
  width: 100%;
  border-radius: var(--radius-xl);
  box-shadow: 0 0 80px rgba(6,182,212,0.15), var(--shadow-xl);
}

.global-right p {
  color: rgba(255,255,255,.75);
  line-height: 1.75;
  margin-bottom: 2rem;
}

.protocol-pillars { margin-bottom: 2rem; }
.pillars-title {
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 1.25rem;
}
.pillar {
  display: flex;
  gap: 1.25rem;
  align-items: flex-start;
  padding: 1.1rem 0;
  border-bottom: 1px solid rgba(255,255,255,.06);
}
.pillar:last-child { border-bottom: none; }
.pillar-num {
  font-size: 1.8rem;
  font-weight: 900;
  color: rgba(255,255,255,.08);
  line-height: 1;
  flex-shrink: 0;
  width: 48px;
  font-family: 'DM Serif Display', serif;
}
.pillar strong { color: var(--white); font-size: .95rem; display: block; margin-bottom: 4px; }
.pillar p { color: rgba(255,255,255,.6); font-size: .85rem; line-height: 1.65; margin: 0; }

.goal-banner {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: rgba(255,255,255,.07);
  border: 1px solid rgba(255,255,255,.12);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.5rem;
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}
.goal-icon { font-size: 1.5rem; flex-shrink: 0; }
.goal-banner strong { color: var(--white); display: block; margin-bottom: 2px; }
.goal-banner p { color: rgba(255,255,255,.75); font-size: .9rem; margin: 0; }

/* ---------- DONATION TIERS ---------- */
.section-donate { background: var(--gray-50); }
.tiers-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1.25rem;
  margin-bottom: 4rem;
}
.tier-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-xl);
  padding: 2rem 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: .75rem;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  position: relative;
  overflow: hidden;
}
.tier-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  border-color: var(--blue-300, #93c5fd);
}
.tier-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--blue-600), var(--blue-400));
}
.tier-featured {
  background: linear-gradient(180deg, #f0f7ff 0%, var(--white) 30%);
  border-color: var(--blue-300, #93c5fd);
  box-shadow: var(--shadow-blue);
}
.tier-featured::before { background: linear-gradient(90deg, var(--blue-700), var(--cyan)); height: 5px; }
.tier-global { background: linear-gradient(180deg, #0f172a, #1a2e4a); border-color: rgba(255,255,255,.12); }
.tier-global::before { background: linear-gradient(90deg, #06b6d4, #8b5cf6); }
.tier-global .tier-amount,
.tier-global .tier-name,
.tier-global .tier-desc { color: var(--white); }

.tier-popular-badge {
  background: var(--blue-700);
  color: var(--white);
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 3px 12px;
  border-radius: var(--radius-full);
}
.tier-amount {
  font-size: 2.2rem;
  font-weight: 900;
  color: var(--blue-700);
  letter-spacing: -0.04em;
  line-height: 1;
}
.tier-name {
  font-size: 1rem;
  font-weight: 700;
  color: var(--gray-900);
}
.tier-desc {
  font-size: .83rem;
  color: var(--gray-600);
  line-height: 1.55;
  flex-grow: 1;
}
.tier-impact-icon { font-size: 1.8rem; }

/* Donate Form — styles in donation.css */

/* ---------- FOOTER ---------- */
.footer {
  background: var(--gray-900);
  color: rgba(255,255,255,.75);
  padding: 60px 0 32px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.logo-footer .logo-text { display: none; }
.footer-brand .logo { margin-bottom: 1rem; }
.logo-footer { align-items: center; }
.logo-footer .logo-text-dark { color: var(--white) !important; display: inline !important; }
.footer-tagline {
  font-size: .88rem;
  line-height: 1.7;
  color: rgba(255,255,255,.55);
  margin-bottom: .75rem;
  font-style: italic;
}
.footer-org { font-size: .8rem; color: rgba(255,255,255,.35); }
.footer-col h4 {
  color: var(--white);
  font-size: .85rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}
.footer-col ul { display: flex; flex-direction: column; gap: .6rem; }
.footer-col a {
  font-size: .88rem;
  color: rgba(255,255,255,.55);
  transition: color var(--transition);
}
.footer-col a:hover { color: var(--white); }
.footer-col li:not(:has(a)) { font-size: .88rem; color: rgba(255,255,255,.4); }
.footer-bottom {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.footer-bottom p { font-size: .82rem; color: rgba(255,255,255,.35); }
.footer-bottom a { color: rgba(255,255,255,.5); }
.footer-bottom a:hover { color: var(--white); }
.footer-seo-note { font-size: .76rem !important; color: rgba(255,255,255,.2) !important; }

/* ---------- TOAST ---------- */
.toast {
  position: fixed;
  bottom: 32px;
  right: 32px;
  background: var(--gray-900);
  color: var(--white);
  padding: 14px 22px;
  border-radius: var(--radius-lg);
  font-size: .9rem;
  font-weight: 500;
  box-shadow: var(--shadow-xl);
  transform: translateY(80px);
  opacity: 0;
  transition: all .4s cubic-bezier(0.4, 0, 0.2, 1);
  pointer-events: none;
  z-index: 9999;
  max-width: 320px;
}
.toast.show { transform: translateY(0); opacity: 1; }
.toast.success { background: #065f46; border-left: 4px solid #34d399; }
.toast.error { background: #7f1d1d; border-left: 4px solid #f87171; }

/* ---------- ANIMATIONS ---------- */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(30px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeDown {
  from { opacity: 0; transform: translateY(-20px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* Scroll reveal */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity .7s ease, transform .7s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal-left {
  opacity: 0;
  transform: translateX(-30px);
  transition: opacity .7s ease, transform .7s ease;
}
.reveal-left.visible { opacity: 1; transform: translateX(0); }
.reveal-right {
  opacity: 0;
  transform: translateX(30px);
  transition: opacity .7s ease, transform .7s ease;
}
.reveal-right.visible { opacity: 1; transform: translateX(0); }

/* ---------- RESPONSIVE ---------- */
@media (max-width: 1100px) {
  .tiers-grid { grid-template-columns: repeat(3, 1fr); }
  .tier-card:last-child { grid-column: span 1; }
}

@media (max-width: 900px) {
  .mission-layout,
  .tech-layout,
  .global-layout { grid-template-columns: 1fr; gap: 3rem; }
  .mission-visual { order: -1; }
  .global-left { order: -1; }
  .tech-right { justify-content: center; }
  .impact-grid { grid-template-columns: repeat(2, 1fr); }
  .clinic-features-grid { grid-template-columns: repeat(2, 1fr); }
  .tiers-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px) {
  .section { padding: 70px 0; }
  nav ul { display: none; }
  nav ul.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    inset: var(--nav-h) 0 0 0;
    background: rgba(0, 30, 80, 0.98);
    -webkit-backdrop-filter: blur(20px);
  backdrop-filter: blur(20px);
    align-items: center;
    justify-content: center;
    gap: 2rem;
    z-index: 999;
  }
  nav ul.open .nav-link { font-size: 1.3rem; }
  nav ul.open .nav-cta { font-size: 1.2rem; padding: 12px 32px; }
  .hamburger { display: flex; }
  .hero-headline { font-size: 2.4rem; }
  .hero-stats { gap: 1.5rem; flex-wrap: wrap; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; justify-content: center; }
  .impact-grid { grid-template-columns: repeat(2, 1fr); }
  .clinic-features-grid { grid-template-columns: 1fr; }
  .tiers-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .mission-badge-card { position: static; margin-top: 1rem; max-width: 100%; }
  .toast { right: 16px; left: 16px; max-width: none; }
}