/* ============================================
   MY SELF VISHNU BLOOD BANK — Design System
   ============================================ */

/* --- CSS Custom Properties --- */
:root {
  /* Primary Colors */
  --primary: #DC2626;
  --primary-dark: #B91C1C;
  --primary-darker: #991B1B;
  --primary-light: #EF4444;
  --primary-50: #FEF2F2;
  --primary-100: #FEE2E2;
  --primary-200: #FECACA;

  /* Neutrals */
  --white: #FFFFFF;
  --gray-50: #F9FAFB;
  --gray-100: #F3F4F6;
  --gray-200: #E5E7EB;
  --gray-300: #D1D5DB;
  --gray-400: #9CA3AF;
  --gray-500: #6B7280;
  --gray-600: #4B5563;
  --gray-700: #374151;
  --gray-800: #1F2937;
  --gray-900: #111827;

  /* Status Colors */
  --green: #059669;
  --green-light: #D1FAE5;
  --amber: #D97706;
  --amber-light: #FEF3C7;
  --red-status: #DC2626;
  --red-light: #FEE2E2;

  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;

  /* Spacing */
  --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;

  /* Borders & Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.08), 0 8px 10px -6px rgba(0,0,0,0.04);
  --shadow-card: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-card-hover: 0 10px 25px rgba(0,0,0,0.1), 0 4px 10px rgba(0,0,0,0.05);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 350ms ease;

  /* Layout */
  --max-width: 1200px;
  --header-height: 72px;
}

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

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

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--gray-800);
  background-color: var(--white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
  font-size: inherit;
}

input, select, textarea {
  font-family: inherit;
  font-size: inherit;
}

ul, ol {
  list-style: none;
}

/* --- Utility Classes --- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

.text-center { text-align: center; }
.text-left { text-align: left; }

/* --- Section Spacing --- */
.section {
  padding: var(--space-20) 0;
}

.section--gray {
  background-color: var(--gray-50);
}

.section--red {
  background-color: var(--primary-50);
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-4);
}

.section-title {
  font-size: var(--font-size-3xl);
  font-weight: 800;
  color: var(--gray-900);
  line-height: 1.2;
  margin-bottom: var(--space-4);
}

.section-subtitle {
  font-size: var(--font-size-lg);
  color: var(--gray-500);
  max-width: 640px;
  line-height: 1.7;
}

.section-subtitle.centered {
  margin-left: auto;
  margin-right: auto;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-weight: 600;
  font-size: var(--font-size-base);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
  white-space: nowrap;
  line-height: 1.5;
  min-height: 48px;
}

.btn--primary {
  background-color: var(--primary);
  color: var(--white);
  box-shadow: 0 2px 8px rgba(220,38,38,0.3);
}

.btn--primary:hover {
  background-color: var(--primary-dark);
  box-shadow: 0 4px 12px rgba(220,38,38,0.4);
  transform: translateY(-1px);
}

.btn--primary:active {
  transform: translateY(0);
}

.btn--secondary {
  background-color: var(--white);
  color: var(--primary);
  border: 2px solid var(--primary);
}

.btn--secondary:hover {
  background-color: var(--primary-50);
  border-color: var(--primary-dark);
}

.btn--ghost {
  background-color: transparent;
  color: var(--gray-700);
}

.btn--ghost:hover {
  background-color: var(--gray-100);
  color: var(--gray-900);
}

.btn--white {
  background-color: var(--white);
  color: var(--primary);
  box-shadow: var(--shadow-md);
}

.btn--white:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-1px);
}

.btn--sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--font-size-sm);
  min-height: 40px;
  border-radius: var(--radius-md);
}

.btn--lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--font-size-lg);
  min-height: 56px;
  border-radius: var(--radius-xl);
}

.btn--full {
  width: 100%;
}

/* --- Header --- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--gray-200);
  z-index: 1000;
  transition: all var(--transition-base);
}

.header--scrolled {
  box-shadow: var(--shadow-md);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.header__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-weight: 800;
  font-size: var(--font-size-lg);
  color: var(--gray-900);
  flex-shrink: 0;
}

.header__logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-size: 20px;
}

.header__logo-text span {
  color: var(--primary);
}

.header__nav {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.header__nav a {
  padding: var(--space-2) var(--space-3);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--gray-600);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.header__nav a:hover,
.header__nav a.active {
  color: var(--primary);
  background-color: var(--primary-50);
}

.header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.header__hamburger {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  transition: background var(--transition-fast);
}

.header__hamburger:hover {
  background-color: var(--gray-100);
}

.header__hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--gray-700);
  position: relative;
  transition: all var(--transition-base);
}

.header__hamburger span::before,
.header__hamburger span::after {
  content: '';
  position: absolute;
  width: 100%;
  height: 100%;
  background-color: inherit;
  left: 0;
  transition: all var(--transition-base);
}

.header__hamburger span::before { top: -7px; }
.header__hamburger span::after { top: 7px; }

.header__hamburger.active span {
  background-color: transparent;
}

.header__hamburger.active span::before {
  top: 0;
  transform: rotate(45deg);
  background-color: var(--gray-700);
}

.header__hamburger.active span::after {
  top: 0;
  transform: rotate(-45deg);
  background-color: var(--gray-700);
}

/* Mobile Menu */
.mobile-menu {
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--white);
  z-index: 999;
  padding: var(--space-6);
  transform: translateX(100%);
  transition: transform var(--transition-slow);
  overflow-y: auto;
}

.mobile-menu.active {
  transform: translateX(0);
}

.mobile-menu__nav {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.mobile-menu__nav a {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4);
  font-size: var(--font-size-lg);
  font-weight: 500;
  color: var(--gray-700);
  border-radius: var(--radius-lg);
  transition: all var(--transition-fast);
}

.mobile-menu__nav a:hover {
  background-color: var(--primary-50);
  color: var(--primary);
}

.mobile-menu__actions {
  margin-top: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

/* --- Hero Section --- */
.hero {
  padding-top: calc(var(--header-height) + var(--space-12));
  padding-bottom: var(--space-16);
  background: linear-gradient(180deg, var(--primary-50) 0%, var(--white) 100%);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -200px;
  right: -200px;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(220,38,38,0.06) 0%, transparent 70%);
  border-radius: 50%;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -150px;
  left: -150px;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(220,38,38,0.04) 0%, transparent 70%);
  border-radius: 50%;
}

.hero__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero__content {
  max-width: 560px;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--white);
  border: 1px solid var(--primary-200);
  color: var(--primary);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: 600;
  margin-bottom: var(--space-6);
  box-shadow: var(--shadow-sm);
}

.hero__title {
  font-size: var(--font-size-5xl);
  font-weight: 900;
  color: var(--gray-900);
  line-height: 1.1;
  margin-bottom: var(--space-6);
  letter-spacing: -0.02em;
}

.hero__title span {
  color: var(--primary);
}

.hero__text {
  font-size: var(--font-size-lg);
  color: var(--gray-500);
  line-height: 1.7;
  margin-bottom: var(--space-8);
  max-width: 480px;
}

.hero__actions {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.hero__visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero__image-container {
  width: 100%;
  max-width: 480px;
  aspect-ratio: 1;
  background: linear-gradient(135deg, var(--primary-100), var(--primary-50));
  border-radius: var(--radius-2xl);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.hero__image-container svg {
  width: 60%;
  height: 60%;
  color: var(--primary);
  opacity: 0.3;
}

.hero__floating-card {
  position: absolute;
  background: var(--white);
  border-radius: var(--radius-xl);
  padding: var(--space-4);
  box-shadow: var(--shadow-xl);
  animation: float 6s ease-in-out infinite;
}

.hero__floating-card--top {
  top: 10%;
  right: -10%;
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.hero__floating-card--bottom {
  bottom: 10%;
  left: -5%;
  animation-delay: -3s;
}

.hero__floating-card .icon-circle {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
}

.hero__floating-card .icon-circle--red {
  background: var(--primary-100);
  color: var(--primary);
}

.hero__floating-card .icon-circle--green {
  background: var(--green-light);
  color: var(--green);
}

.hero__floating-card .card-text strong {
  display: block;
  font-size: var(--font-size-sm);
  color: var(--gray-900);
}

.hero__floating-card .card-text span {
  font-size: var(--font-size-xs);
  color: var(--gray-500);
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

/* --- Emergency Quick Action --- */
.emergency-card {
  background: var(--white);
  border: 2px solid var(--primary-200);
  border-radius: var(--radius-2xl);
  padding: var(--space-8);
  box-shadow: var(--shadow-lg);
  position: relative;
  z-index: 2;
  margin-top: calc(-1 * var(--space-12));
}

.emergency-card__header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
}

.emergency-card__header .pulse-dot {
  width: 12px;
  height: 12px;
  background: var(--primary);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
  flex-shrink: 0;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.2); }
}

.emergency-card__title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--gray-900);
}

.emergency-card__form {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr auto;
  gap: var(--space-4);
  align-items: end;
}

.emergency-card__note {
  margin-top: var(--space-4);
  padding: var(--space-3) var(--space-4);
  background: var(--primary-50);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  color: var(--gray-600);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

/* --- Form Elements --- */
.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.form-label {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--gray-700);
}

.form-input,
.form-select {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  border: 1.5px solid var(--gray-200);
  border-radius: var(--radius-lg);
  font-size: var(--font-size-base);
  color: var(--gray-800);
  background: var(--white);
  transition: all var(--transition-fast);
  min-height: 48px;
}

.form-input:focus,
.form-select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(220,38,38,0.1);
}

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

.form-input.error {
  border-color: var(--red-status);
  box-shadow: 0 0 0 3px rgba(220,38,38,0.1);
}

.form-error {
  font-size: var(--font-size-xs);
  color: var(--red-status);
  display: none;
}

.form-error.visible {
  display: block;
}

textarea.form-input {
  min-height: 100px;
  resize: vertical;
}

/* --- Blood Group Search Section --- */
.blood-search {
  padding: var(--space-16) 0;
}

.blood-search__card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-2xl);
  padding: var(--space-8);
  box-shadow: var(--shadow-lg);
}

.blood-search__form {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr auto;
  gap: var(--space-4);
  align-items: end;
}

/* --- Blood Availability Dashboard --- */
.dashboard__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
  margin-top: var(--space-8);
}

.blood-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  text-align: center;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.blood-card:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-4px);
  border-color: var(--primary-200);
}

.blood-card__group {
  font-size: var(--font-size-4xl);
  font-weight: 900;
  color: var(--primary);
  margin-bottom: var(--space-3);
  line-height: 1;
}

.blood-card__status {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 600;
}

.blood-card__status--available {
  background: var(--green-light);
  color: var(--green);
}

.blood-card__status--limited {
  background: var(--amber-light);
  color: var(--amber);
}

.blood-card__status--urgent {
  background: var(--red-light);
  color: var(--red-status);
}

.blood-card__status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: currentColor;
}

.blood-card__units {
  margin-top: var(--space-3);
  font-size: var(--font-size-sm);
  color: var(--gray-500);
}

.dashboard__footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: var(--space-8);
  padding-top: var(--space-6);
  border-top: 1px solid var(--gray-200);
}

.dashboard__updated {
  font-size: var(--font-size-sm);
  color: var(--gray-500);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

/* --- How It Works --- */
.steps__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-8);
  margin-top: var(--space-12);
  position: relative;
}

.steps__grid::before {
  content: '';
  position: absolute;
  top: 48px;
  left: 15%;
  right: 15%;
  height: 2px;
  background: linear-gradient(90deg, var(--primary-200), var(--primary-100), var(--primary-200));
}

.step {
  text-align: center;
  position: relative;
  z-index: 1;
}

.step__number {
  width: 72px;
  height: 72px;
  border-radius: var(--radius-full);
  background: var(--primary-50);
  border: 3px solid var(--primary-200);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-5);
  font-size: var(--font-size-2xl);
  color: var(--primary);
  font-weight: 800;
  transition: all var(--transition-base);
}

.step:hover .step__number {
  background: var(--primary);
  color: var(--white);
  border-color: var(--primary);
  transform: scale(1.1);
}

.step__title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: var(--space-2);
}

.step__desc {
  font-size: var(--font-size-sm);
  color: var(--gray-500);
  line-height: 1.6;
  max-width: 220px;
  margin: 0 auto;
}

/* --- Donate Section --- */
.donate__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: center;
  margin-top: var(--space-8);
}

.donate__content h3 {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: var(--space-4);
}

.donate__content p {
  color: var(--gray-600);
  line-height: 1.7;
  margin-bottom: var(--space-6);
}

.eligibility-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-bottom: var(--space-8);
}

.eligibility-list li {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--font-size-base);
  color: var(--gray-700);
}

.eligibility-list li .check-icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--green-light);
  color: var(--green);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 14px;
}

.donate__visual {
  display: flex;
  justify-content: center;
}

.donate__image-box {
  width: 100%;
  max-width: 400px;
  aspect-ratio: 4/3;
  background: linear-gradient(135deg, var(--primary-100), var(--primary-50));
  border-radius: var(--radius-2xl);
  display: flex;
  align-items: center;
  justify-content: center;
}

.donate__image-box svg {
  width: 50%;
  height: 50%;
  color: var(--primary);
  opacity: 0.3;
}

/* --- Education / FAQ Section --- */
.faq-list {
  max-width: 800px;
  margin: var(--space-8) auto 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.faq-item {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: all var(--transition-base);
}

.faq-item.active {
  border-color: var(--primary-200);
  box-shadow: var(--shadow-md);
}

.faq-item__question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-5) var(--space-6);
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--gray-800);
  text-align: left;
  cursor: pointer;
  transition: color var(--transition-fast);
}

.faq-item__question:hover {
  color: var(--primary);
}

.faq-item__icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  background: var(--gray-100);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all var(--transition-base);
}

.faq-item.active .faq-item__icon {
  background: var(--primary-100);
  color: var(--primary);
  transform: rotate(45deg);
}

.faq-item__answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-slow);
}

.faq-item__answer-inner {
  padding: 0 var(--space-6) var(--space-6);
  color: var(--gray-600);
  line-height: 1.7;
}

/* --- Impact Section --- */
.impact__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
  margin-top: var(--space-10);
}

.impact-card {
  text-align: center;
  padding: var(--space-8) var(--space-4);
  background: var(--white);
  border-radius: var(--radius-xl);
  border: 1px solid var(--gray-100);
  transition: all var(--transition-base);
}

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

.impact-card__icon {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-4);
  font-size: 28px;
}

.impact-card__icon--red {
  background: var(--primary-50);
  color: var(--primary);
}

.impact-card__icon--green {
  background: var(--green-light);
  color: var(--green);
}

.impact-card__icon--amber {
  background: var(--amber-light);
  color: var(--amber);
}

.impact-card__number {
  font-size: var(--font-size-4xl);
  font-weight: 900;
  color: var(--gray-900);
  line-height: 1;
  margin-bottom: var(--space-2);
}

.impact-card__label {
  font-size: var(--font-size-sm);
  color: var(--gray-500);
  font-weight: 500;
}

/* --- Testimonials --- */
.testimonials__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
  margin-top: var(--space-10);
}

.testimonial-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  transition: all var(--transition-base);
  position: relative;
}

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

.testimonial-card__quote {
  font-size: 40px;
  color: var(--primary-200);
  line-height: 1;
  margin-bottom: var(--space-4);
  font-family: Georgia, serif;
}

.testimonial-card__text {
  color: var(--gray-600);
  line-height: 1.7;
  margin-bottom: var(--space-6);
  font-size: var(--font-size-sm);
}

.testimonial-card__author {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.testimonial-card__avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--primary-100);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: var(--font-size-sm);
}

.testimonial-card__name {
  font-weight: 700;
  color: var(--gray-900);
  font-size: var(--font-size-sm);
}

.testimonial-card__role {
  font-size: var(--font-size-xs);
  color: var(--gray-500);
}

/* --- Emergency Contact Section --- */
.emergency-contact {
  background: linear-gradient(135deg, var(--gray-900), var(--gray-800));
  border-radius: var(--radius-2xl);
  padding: var(--space-12);
  color: var(--white);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: center;
  position: relative;
  overflow: hidden;
}

.emergency-contact::before {
  content: '';
  position: absolute;
  top: -100px;
  right: -100px;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(220,38,38,0.15) 0%, transparent 70%);
  border-radius: 50%;
}

.emergency-contact__content {
  position: relative;
  z-index: 1;
}

.emergency-contact__title {
  font-size: var(--font-size-3xl);
  font-weight: 800;
  margin-bottom: var(--space-4);
  line-height: 1.2;
}

.emergency-contact__text {
  color: var(--gray-400);
  line-height: 1.7;
  margin-bottom: var(--space-8);
}

.emergency-contact__details {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.emergency-contact__item {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  font-size: var(--font-size-base);
}

.emergency-contact__item-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-lg);
  background: rgba(255,255,255,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
}

.emergency-contact__item-label {
  font-size: var(--font-size-xs);
  color: var(--gray-400);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.emergency-contact__item-value {
  font-weight: 600;
}

.emergency-contact__cta {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
}

.emergency-contact__cta .phone-display {
  font-size: var(--font-size-4xl);
  font-weight: 900;
  color: var(--white);
  letter-spacing: 0.02em;
}

/* --- Footer --- */
.footer {
  background: var(--gray-900);
  color: var(--gray-400);
  padding: var(--space-16) 0 0;
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-12);
  padding-bottom: var(--space-12);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.footer__brand {
  max-width: 320px;
}

.footer__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.footer__logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-size: 20px;
}

.footer__logo-text {
  font-weight: 800;
  font-size: var(--font-size-lg);
  color: var(--white);
}

.footer__brand-text {
  font-size: var(--font-size-sm);
  line-height: 1.7;
  margin-bottom: var(--space-6);
}

.footer__social {
  display: flex;
  gap: var(--space-3);
}

.footer__social a {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: rgba(255,255,255,0.06);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--gray-400);
  transition: all var(--transition-fast);
  font-size: 18px;
}

.footer__social a:hover {
  background: var(--primary);
  color: var(--white);
}

.footer__heading {
  font-size: var(--font-size-sm);
  font-weight: 700;
  color: var(--white);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-5);
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer__links a {
  font-size: var(--font-size-sm);
  color: var(--gray-400);
  transition: color var(--transition-fast);
}

.footer__links a:hover {
  color: var(--white);
}

.footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-6) 0;
  font-size: var(--font-size-sm);
}

.footer__bottom-links {
  display: flex;
  gap: var(--space-6);
}

.footer__bottom-links a {
  font-size: var(--font-size-sm);
  color: var(--gray-500);
}

.footer__bottom-links a:hover {
  color: var(--white);
}

/* --- Page Header (for inner pages) --- */
.page-header {
  padding-top: calc(var(--header-height) + var(--space-16));
  padding-bottom: var(--space-12);
  background: linear-gradient(180deg, var(--primary-50) 0%, var(--white) 100%);
  text-align: center;
}

.page-header__title {
  font-size: var(--font-size-4xl);
  font-weight: 900;
  color: var(--gray-900);
  margin-bottom: var(--space-4);
}

.page-header__subtitle {
  font-size: var(--font-size-lg);
  color: var(--gray-500);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.7;
}

/* --- Forms (Inner Pages) --- */
.form-page {
  padding: var(--space-12) 0 var(--space-20);
}

.form-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-2xl);
  padding: var(--space-8);
  box-shadow: var(--shadow-lg);
  max-width: 800px;
  margin: 0 auto;
}

.form-card__header {
  text-align: center;
  margin-bottom: var(--space-8);
}

.form-card__title {
  font-size: var(--font-size-2xl);
  font-weight: 800;
  color: var(--gray-900);
  margin-bottom: var(--space-2);
}

.form-card__desc {
  color: var(--gray-500);
}

/* Multi-step form */
.form-steps {
  display: flex;
  justify-content: center;
  gap: var(--space-2);
  margin-bottom: var(--space-8);
}

.form-step-indicator {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.form-step-dot {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-sm);
  font-weight: 700;
  border: 2px solid var(--gray-200);
  color: var(--gray-400);
  background: var(--white);
  transition: all var(--transition-base);
}

.form-step-dot.active {
  border-color: var(--primary);
  background: var(--primary);
  color: var(--white);
}

.form-step-dot.completed {
  border-color: var(--green);
  background: var(--green);
  color: var(--white);
}

.form-step-line {
  width: 48px;
  height: 2px;
  background: var(--gray-200);
  transition: background var(--transition-base);
}

.form-step-line.active {
  background: var(--primary);
}

.form-section {
  display: none;
}

.form-section.active {
  display: block;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

.form-actions {
  display: flex;
  gap: var(--space-4);
  margin-top: var(--space-8);
  justify-content: flex-end;
}

/* Confirmation Screen */
.confirmation {
  text-align: center;
  padding: var(--space-12) var(--space-6);
}

.confirmation__icon {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: var(--green-light);
  color: var(--green);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-6);
  font-size: 36px;
  animation: scaleIn 0.5s ease;
}

@keyframes scaleIn {
  0% { transform: scale(0); }
  50% { transform: scale(1.2); }
  100% { transform: scale(1); }
}

.confirmation__title {
  font-size: var(--font-size-2xl);
  font-weight: 800;
  color: var(--gray-900);
  margin-bottom: var(--space-3);
}

.confirmation__ref {
  display: inline-block;
  background: var(--gray-100);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  font-family: monospace;
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--primary);
  margin: var(--space-4) 0;
}

.confirmation__text {
  color: var(--gray-500);
  max-width: 480px;
  margin: 0 auto var(--space-8);
  line-height: 1.7;
}

/* --- Admin Dashboard --- */
.admin-layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  min-height: 100vh;
  padding-top: var(--header-height);
}

.admin-sidebar {
  background: var(--gray-900);
  padding: var(--space-6);
  color: var(--gray-400);
}

.admin-sidebar__nav {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  margin-top: var(--space-8);
}

.admin-sidebar__link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-lg);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--gray-400);
  transition: all var(--transition-fast);
}

.admin-sidebar__link:hover,
.admin-sidebar__link.active {
  background: rgba(255,255,255,0.08);
  color: var(--white);
}

.admin-main {
  padding: var(--space-8);
  background: var(--gray-50);
  overflow-y: auto;
}

.admin-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
  margin-bottom: var(--space-8);
}

.admin-stat {
  background: var(--white);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  box-shadow: var(--shadow-sm);
}

.admin-stat__label {
  font-size: var(--font-size-sm);
  color: var(--gray-500);
  margin-bottom: var(--space-2);
}

.admin-stat__value {
  font-size: var(--font-size-3xl);
  font-weight: 800;
  color: var(--gray-900);
}

.admin-stat__change {
  font-size: var(--font-size-xs);
  font-weight: 600;
  margin-top: var(--space-1);
}

.admin-stat__change--up { color: var(--green); }
.admin-stat__change--down { color: var(--red-status); }

.admin-table {
  background: var(--white);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.admin-table__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-5) var(--space-6);
  border-bottom: 1px solid var(--gray-200);
}

.admin-table__title {
  font-weight: 700;
  color: var(--gray-900);
}

.admin-table table {
  width: 100%;
  border-collapse: collapse;
}

.admin-table th {
  text-align: left;
  padding: var(--space-3) var(--space-6);
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--gray-500);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: var(--gray-50);
  border-bottom: 1px solid var(--gray-200);
}

.admin-table td {
  padding: var(--space-4) var(--space-6);
  font-size: var(--font-size-sm);
  color: var(--gray-700);
  border-bottom: 1px solid var(--gray-100);
}

.admin-table tr:last-child td {
  border-bottom: none;
}

.admin-table tr:hover td {
  background: var(--gray-50);
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 600;
}

.status-badge--pending {
  background: var(--amber-light);
  color: var(--amber);
}

.status-badge--approved {
  background: var(--green-light);
  color: var(--green);
}

.status-badge--urgent {
  background: var(--red-light);
  color: var(--red-status);
}

.status-badge--completed {
  background: var(--gray-100);
  color: var(--gray-500);
}

/* --- Scroll Animations --- */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Toast / Notification --- */
.toast {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  background: var(--gray-900);
  color: var(--white);
  padding: var(--space-4) var(--space-6);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--font-size-sm);
  font-weight: 500;
  transform: translateY(120%);
  transition: transform var(--transition-base);
  z-index: 9999;
}

.toast.visible {
  transform: translateY(0);
}

.toast--success {
  border-left: 4px solid var(--green);
}

.toast--error {
  border-left: 4px solid var(--red-status);
}

/* --- Mobile Sticky Bottom Bar --- */
.mobile-bottom-bar {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--white);
  border-top: 1px solid var(--gray-200);
  padding: var(--space-3) var(--space-4);
  z-index: 100;
  box-shadow: 0 -4px 20px rgba(0,0,0,0.08);
}

.mobile-bottom-bar__inner {
  display: flex;
  gap: var(--space-3);
}

.mobile-bottom-bar .btn {
  flex: 1;
  font-size: var(--font-size-sm);
  min-height: 44px;
}

/* --- Loading Spinner --- */
.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: var(--white);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

/* Tablet */
@media (max-width: 1024px) {
  .hero__inner {
    grid-template-columns: 1fr;
    gap: var(--space-8);
    text-align: center;
  }

  .hero__content {
    max-width: 100%;
  }

  .hero__text {
    max-width: 100%;
    margin-left: auto;
    margin-right: auto;
  }

  .hero__actions {
    justify-content: center;
  }

  .hero__visual {
    display: none;
  }

  .emergency-card__form {
    grid-template-columns: 1fr 1fr;
  }

  .dashboard__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .steps__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .steps__grid::before {
    display: none;
  }

  .donate__grid {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  .donate__visual {
    order: -1;
  }

  .impact__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .testimonials__grid {
    grid-template-columns: 1fr 1fr;
  }

  .emergency-contact {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  .footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
  }

  .blood-search__form {
    grid-template-columns: 1fr 1fr;
  }

  .admin-layout {
    grid-template-columns: 1fr;
  }

  .admin-sidebar {
    display: none;
  }

  .admin-stats {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Mobile */
@media (max-width: 768px) {
  :root {
    --font-size-5xl: 2rem;
    --font-size-4xl: 1.75rem;
    --font-size-3xl: 1.5rem;
    --header-height: 64px;
  }

  .section {
    padding: var(--space-12) 0;
  }

  .container {
    padding: 0 var(--space-4);
  }

  .header__nav {
    display: none;
  }

  .header__actions .btn {
    display: none;
  }

  .header__hamburger {
    display: flex;
  }

  .hero {
    padding-top: calc(var(--header-height) + var(--space-8));
    padding-bottom: var(--space-12);
  }

  .emergency-card {
    padding: var(--space-6);
    margin-top: calc(-1 * var(--space-8));
  }

  .emergency-card__form {
    grid-template-columns: 1fr;
  }

  .blood-search__form {
    grid-template-columns: 1fr;
  }

  .dashboard__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-3);
  }

  .blood-card__group {
    font-size: var(--font-size-3xl);
  }

  .steps__grid {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

  .donate__grid {
    grid-template-columns: 1fr;
  }

  .impact__grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3);
  }

  .testimonials__grid {
    grid-template-columns: 1fr;
  }

  .emergency-contact {
    padding: var(--space-8);
    border-radius: var(--radius-xl);
  }

  .emergency-contact__cta .phone-display {
    font-size: var(--font-size-3xl);
  }

  .footer__grid {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  .footer__bottom {
    flex-direction: column;
    gap: var(--space-4);
    text-align: center;
  }

  .mobile-bottom-bar {
    display: block;
  }

  body {
    padding-bottom: 80px;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .form-card {
    padding: var(--space-6);
  }

  .form-actions {
    flex-direction: column;
  }

  .form-actions .btn {
    width: 100%;
  }

  .admin-stats {
    grid-template-columns: 1fr;
  }
}

/* Small Mobile */
@media (max-width: 480px) {
  .dashboard__grid {
    grid-template-columns: 1fr 1fr;
  }

  .impact__grid {
    grid-template-columns: 1fr 1fr;
  }

  .hero__actions {
    flex-direction: column;
    align-items: stretch;
  }

  .hero__actions .btn {
    width: 100%;
  }
}