frontend/src/styles/index.css

@import "tailwindcss";

/* ============================================
   SOCIAL SHARE & CARE FOUNDATION
   Design System — CSS Custom Properties
   ============================================ */

@theme {
  /* ─── Primary Palette (Teal) ─── */
  --color-primary-50: #f0fdfa;
  --color-primary-100: #ccfbf1;
  --color-primary-200: #99f6e4;
  --color-primary-300: #5eead4;
  --color-primary-400: #2dd4bf;
  --color-primary-500: #00A99D; /* Logo Teal */
  --color-primary-600: #0d9488;
  --color-primary-700: #0f766e;
  --color-primary-800: #115e59;
  --color-primary-900: #134e4a;

  /* ─── Secondary Palette (Deep Blue) ─── */
  --color-secondary-50: #eff6ff;
  --color-secondary-100: #dbeafe;
  --color-secondary-200: #bfdbfe;
  --color-secondary-300: #60a5fa;
  --color-secondary-400: #3b82f6;
  --color-secondary-500: #0F4C81; /* Logo Blue */
  --color-secondary-600: #1d4ed8;
  --color-secondary-700: #1e40af;
  --color-secondary-800: #1e3a8a;
  --color-secondary-900: #172554;

  /* ─── Accent (Bright Green) ─── */
  --color-accent-50: #f0fdf4;
  --color-accent-100: #dcfce7;
  --color-accent-200: #bbf7d0;
  --color-accent-300: #86efac;
  --color-accent-400: #4ade80;
  --color-accent-500: #00C853; /* Logo Top Green */
  --color-accent-600: #16a34a;
  --color-accent-700: #15803d;
  --color-accent-800: #166534;
  --color-accent-900: #14532d;

  /* ─── Neutral (Slate) ─── */
  --color-neutral-50: #f8fafc;
  --color-neutral-100: #f1f5f9;
  --color-neutral-200: #e2e8f0;
  --color-neutral-300: #cbd5e1;
  --color-neutral-400: #94a3b8;
  --color-neutral-500: #64748b;
  --color-neutral-600: #475569;
  --color-neutral-700: #334155;
  --color-neutral-800: #1e293b;
  --color-neutral-900: #0f172a;

  /* ─── Semantic Colors ─── */
  --color-success: #10B981;
  --color-warning: #F59E0B;
  --color-error: #EF4444;
  --color-info: #0ea5e9;

  /* ─── Font Families ─── */
  --font-heading: 'Montserrat', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-stats: 'Montserrat', sans-serif;

  /* ─── Shadows ─── */
  --shadow-glass: 0 8px 32px rgba(0, 0, 0, 0.08);
  --shadow-card: 0 4px 16px rgba(0, 0, 0, 0.06);
  --shadow-card-hover: 0 12px 40px rgba(0, 169, 157, 0.15);
  --shadow-btn: 0 4px 14px rgba(0, 169, 157, 0.25);
  --shadow-btn-hover: 0 6px 20px rgba(0, 169, 157, 0.35);

  /* ─── Border Radius ─── */
  --radius-sm: 0.375rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-2xl: 2rem;
  --radius-full: 9999px;
}


/* ============================================
   BASE / RESET
   ============================================ */

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  color: var(--color-neutral-800);
  background-color: var(--color-neutral-50);
  line-height: 1.6;
  overflow-x: hidden;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-neutral-900);
}

a {
  text-decoration: none;
  color: inherit;
  transition: color 0.3s ease;
}

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

button {
  cursor: pointer;
  font-family: var(--font-body);
  border: none;
  outline: none;
  background: none;
}

input,
textarea,
select {
  font-family: var(--font-body);
  outline: none;
  border: none;
}

ul,
ol {
  list-style: none;
}

/* ============================================
   SCROLLBAR
   ============================================ */

::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--color-neutral-100);
}

::-webkit-scrollbar-thumb {
  background: var(--color-primary-400);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-primary-500);
}

/* ============================================
   UTILITY CLASSES (Vanilla CSS)
   ============================================ */

/* ─── Container ─── */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

@media (max-width: 768px) {
  .container {
    padding: 0 1rem;
  }
}

/* ─── Section ─── */
.section {
  padding: 5rem 0;
}

.section--alt {
  background-color: var(--color-neutral-100);
}

/* ─── Glassmorphism ─── */
.glass {
  background: rgba(255, 255, 255, 0.75);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.3);
  box-shadow: var(--shadow-glass);
}

.glass--dark {
  background: rgba(17, 24, 39, 0.75);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: white;
}

/* ─── Gradient Backgrounds ─── */
.gradient-primary {
  background: linear-gradient(135deg, var(--color-primary-500), var(--color-primary-700));
}

.gradient-warm {
  background: linear-gradient(135deg, var(--color-secondary-400), var(--color-accent-500));
}

.gradient-hero {
  background: linear-gradient(135deg, var(--color-secondary-900) 0%, var(--color-secondary-700) 50%, var(--color-primary-800) 100%);
}

.gradient-cta {
  background: linear-gradient(135deg, var(--color-primary-600), var(--color-primary-800));
}

.gradient-text {
  background: linear-gradient(135deg, var(--color-primary-500), var(--color-accent-500));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ─── Cards ─── */
.card {
  background: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

/* ─── Buttons ─── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: var(--radius-full);
  transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  white-space: nowrap;
}

.btn--primary {
  background: linear-gradient(135deg, var(--color-primary-500), var(--color-primary-600));
  color: white;
  box-shadow: var(--shadow-btn);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-btn-hover);
  background: linear-gradient(135deg, var(--color-primary-400), var(--color-primary-500));
}

.btn--secondary {
  background: linear-gradient(135deg, var(--color-secondary-500), var(--color-secondary-600));
  color: white;
  box-shadow: 0 4px 14px rgba(245, 158, 11, 0.25);
}

.btn--secondary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(245, 158, 11, 0.35);
}

.btn--accent {
  background: linear-gradient(135deg, var(--color-accent-500), var(--color-accent-600));
  color: white;
  box-shadow: 0 4px 14px rgba(236, 72, 153, 0.25);
}

.btn--accent:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(236, 72, 153, 0.35);
}

.btn--outline {
  background: transparent;
  color: var(--color-primary-500);
  border: 2px solid var(--color-primary-500);
}

.btn--outline:hover {
  background: var(--color-primary-500);
  color: white;
  transform: translateY(-2px);
}

.btn--ghost {
  background: transparent;
  color: var(--color-neutral-700);
  padding: 0.5rem 1rem;
}

.btn--ghost:hover {
  background: var(--color-neutral-100);
  color: var(--color-primary-500);
}

.btn--white {
  background: white;
  color: var(--color-primary-600);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.1);
}

.btn--white:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
}

.btn--sm {
  padding: 0.5rem 1.25rem;
  font-size: 0.85rem;
}

.btn--lg {
  padding: 1rem 2.25rem;
  font-size: 1.05rem;
}

.btn--icon {
  padding: 0.75rem;
  border-radius: 50%;
}

/* ─── Form ─── */
.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-neutral-700);
  margin-bottom: 0.4rem;
}

.form-input {
  width: 100%;
  padding: 0.75rem 1rem;
  background: var(--color-neutral-50);
  border: 2px solid var(--color-neutral-200);
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  color: var(--color-neutral-800);
  transition: all 0.3s ease;
}

.form-input:focus {
  border-color: var(--color-primary-500);
  box-shadow: 0 0 0 4px rgba(0, 169, 157, 0.1);
  background: white;
}

.form-input::placeholder {
  color: var(--color-neutral-400);
}

.form-input--error {
  border-color: var(--color-error);
}

.form-error {
  font-size: 0.8rem;
  color: var(--color-error);
  margin-top: 0.25rem;
}

/* ─── Badges ─── */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.badge--primary {
  background: var(--color-primary-100);
  color: var(--color-primary-700);
}

.badge--secondary {
  background: var(--color-secondary-100);
  color: var(--color-secondary-700);
}

.badge--accent {
  background: var(--color-accent-100);
  color: var(--color-accent-700);
}

.badge--success {
  background: #d1fae5;
  color: #065f46;
}

.badge--warning {
  background: #fef3c7;
  color: #92400e;
}

.badge--error {
  background: #fee2e2;
  color: #991b1b;
}

/* ─── Progress Bar ─── */
.progress-bar {
  width: 100%;
  height: 8px;
  background: var(--color-neutral-200);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-bar__fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-primary-500), var(--color-primary-400));
  border-radius: var(--radius-full);
  transition: width 1s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* ─── Divider ─── */
.divider {
  width: 60px;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary-500), var(--color-accent-500));
  border-radius: var(--radius-full);
  margin: 1rem 0;
}

/* ─── Section Header ─── */
.section-header {
  text-align: center;
  margin-bottom: 3rem;
}

.section-header__tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 1rem;
  background: var(--color-primary-100);
  color: var(--color-primary-600);
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 1rem;
}

.section-header__title {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 0.75rem;
}

.section-header__subtitle {
  font-size: 1.1rem;
  color: var(--color-neutral-500);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.7;
}

@media (max-width: 768px) {
  .section-header__title {
    font-size: 1.75rem;
  }

  .section-header__subtitle {
    font-size: 0.95rem;
  }
}

/* ============================================
   PAGE HERO COMPONENT
   ============================================ */
.about-hero {
  position: relative;
  padding: 10rem 0 5rem;
  text-align: center;
  overflow: hidden;
}

.about-hero__bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--color-secondary-900) 0%, var(--color-secondary-800) 40%, var(--color-primary-800) 100%);
}

.about-hero__content {
  position: relative;
  z-index: 1;
}

.about-hero__title {
  font-size: 3rem;
  font-weight: 800;
  color: white;
  margin-bottom: 1rem;
  margin-top: 1rem;
}

.about-hero__subtitle {
  font-size: 1.15rem;
  color: rgba(255,255,255,0.75);
  max-width: 700px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ============================================
   ANIMATIONS
   ============================================ */

@keyframes fadeIn {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.9);
  }

  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-40px);
  }

  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(40px);
  }

  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes pulse {

  0%,
  100% {
    opacity: 1;
  }

  50% {
    opacity: 0.5;
  }
}

@keyframes float {

  0%,
  100% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(-10px);
  }
}

@keyframes shimmer {
  0% {
    background-position: -200% 0;
  }

  100% {
    background-position: 200% 0;
  }
}

@keyframes spin {
  from {
    transform: rotate(0deg);
  }

  to {
    transform: rotate(360deg);
  }
}

.animate-fadeIn {
  animation: fadeIn 0.6s ease-out;
}

.animate-fadeInUp {
  animation: fadeInUp 0.6s ease-out;
}

.animate-fadeInDown {
  animation: fadeInDown 0.5s ease-out;
}

.animate-scaleIn {
  animation: scaleIn 0.5s ease-out;
}

.animate-slideInLeft {
  animation: slideInLeft 0.6s ease-out;
}

.animate-slideInRight {
  animation: slideInRight 0.6s ease-out;
}

.animate-float {
  animation: float 3s ease-in-out infinite;
}

.animate-pulse {
  animation: pulse 2s ease-in-out infinite;
}

.animate-spin {
  animation: spin 1s linear infinite;
}

/* ─── Skeleton Loading ─── */
.skeleton {
  background: linear-gradient(90deg, var(--color-neutral-200) 25%, var(--color-neutral-100) 50%, var(--color-neutral-200) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-md);
}

/* ─── Overlay ─── */
.overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  z-index: 100;
  animation: fadeIn 0.3s ease-out;
}