/* ============================================================
   PATIENT SAFETY RADAR — BRAND DESIGN SYSTEM
   ============================================================
   A unified design language for trust, clarity, and action.
   ============================================================ */

/* ============ FONTS ============ */
@import url('https://fonts.googleapis.com/css2?family=Instrument+Serif:ital@0;1&family=Inter:wght@400;500;600;700&display=swap');

/* ============ CSS CUSTOM PROPERTIES (DESIGN TOKENS) ============ */
:root {
  /* Typography */
  --font-sans: "Inter", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  --font-serif: "Instrument Serif", Georgia, serif;
  
  /* Base sizing */
  --text-xs: 0.68rem;
  --text-sm: 0.8rem;
  --text-base: 0.95rem;
  --text-lg: 1.1rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: clamp(1.8rem, 4vw, 2.5rem);
  --text-4xl: clamp(2.5rem, 7vw, 4rem);
  --text-hero: clamp(2.5rem, 8vw, 5rem);
  
  /* 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;
  
  /* Border radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-2xl: 24px;
  --radius-3xl: 28px;
  --radius-full: 999px;
  
  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-base: 0.2s ease;
  --transition-slow: 0.35s ease;
  
  /* Shadows */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.15);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.2);
  --shadow-xl: 0 24px 48px rgba(0, 0, 0, 0.25);
  
  /* Z-index scale */
  --z-base: 1;
  --z-dropdown: 100;
  --z-sticky: 500;
  --z-navbar: 1000;
  --z-modal: 2000;
  --z-tooltip: 3000;
}

/* ============ DARK THEME (DEFAULT) ============ */
:root,
[data-theme="dark"] {
  --bg-primary: #050509;
  --bg-secondary: #0a0a0f;
  --bg-tertiary: #10101a;
  --bg-elevated: rgba(255, 255, 255, 0.06);
  --bg-elevated-hover: rgba(255, 255, 255, 0.1);
  
  --text-primary: #f3f4f9;
  --text-secondary: rgba(243, 244, 249, 0.7);
  --text-muted: rgba(243, 244, 249, 0.45);
  --text-inverse: #050509;
  
  --stroke: rgba(255, 255, 255, 0.1);
  --stroke-strong: rgba(255, 255, 255, 0.18);
  
  --accent-primary: #4be1c3;
  --accent-primary-rgb: 75, 225, 195;
  --accent-secondary: #4db5ff;
  --accent-secondary-rgb: 77, 181, 255;
  --accent-glow: rgba(75, 225, 195, 0.2);
  
  --success: #4be1c3;
  --warning: #febf48;
  --danger: #ff4d77;
  --info: #4db5ff;
  
  /* Glass effects */
  --glass-bg: rgba(255, 255, 255, 0.06);
  --glass-border: rgba(255, 255, 255, 0.1);
  --glass-blur: blur(20px) saturate(180%);
  
  /* Navbar */
  --navbar-bg: rgba(5, 5, 9, 0.92);
  --navbar-border: rgba(255, 255, 255, 0.06);
  
  /* Input */
  --input-bg: rgba(0, 0, 0, 0.2);
  --input-border: rgba(255, 255, 255, 0.1);
  --input-focus-border: rgba(75, 225, 195, 0.4);
  --input-focus-ring: rgba(75, 225, 195, 0.1);
  
  /* Card */
  --card-bg: linear-gradient(165deg, rgba(255, 255, 255, 0.08) 0%, rgba(255, 255, 255, 0.02) 100%);
  --card-border: rgba(255, 255, 255, 0.1);
  --card-shadow: 0 8px 24px rgba(0, 0, 0, 0.2), 0 24px 48px rgba(0, 0, 0, 0.18);
}

/* ============ LIGHT THEME ============ */
[data-theme="light"] {
  --bg-primary: #fafafa;
  --bg-secondary: #f5f5f7;
  --bg-tertiary: #ffffff;
  --bg-elevated: rgba(0, 0, 0, 0.04);
  --bg-elevated-hover: rgba(0, 0, 0, 0.08);
  
  --text-primary: #1d1d1f;
  --text-secondary: rgba(29, 29, 31, 0.7);
  --text-muted: rgba(29, 29, 31, 0.45);
  --text-inverse: #ffffff;
  
  --stroke: rgba(0, 0, 0, 0.08);
  --stroke-strong: rgba(0, 0, 0, 0.15);
  
  --accent-primary: #00a67d;
  --accent-primary-rgb: 0, 166, 125;
  --accent-secondary: #0071e3;
  --accent-secondary-rgb: 0, 113, 227;
  --accent-glow: rgba(0, 166, 125, 0.15);
  
  --success: #00a67d;
  --warning: #f5a623;
  --danger: #ff3b30;
  --info: #0071e3;
  
  /* Glass effects */
  --glass-bg: rgba(255, 255, 255, 0.75);
  --glass-border: rgba(0, 0, 0, 0.08);
  --glass-blur: blur(20px) saturate(180%);
  
  /* Navbar */
  --navbar-bg: rgba(250, 250, 250, 0.92);
  --navbar-border: rgba(0, 0, 0, 0.06);
  
  /* Input */
  --input-bg: rgba(0, 0, 0, 0.04);
  --input-border: rgba(0, 0, 0, 0.1);
  --input-focus-border: rgba(0, 166, 125, 0.5);
  --input-focus-ring: rgba(0, 166, 125, 0.1);
  
  /* Card */
  --card-bg: linear-gradient(165deg, rgba(255, 255, 255, 0.9) 0%, rgba(255, 255, 255, 0.6) 100%);
  --card-border: rgba(0, 0, 0, 0.08);
  --card-shadow: 0 4px 12px rgba(0, 0, 0, 0.08), 0 12px 24px rgba(0, 0, 0, 0.06);
}

/* ============ LOGO MARK ============ */
.logo-mark {
  position: relative;
  width: 32px;
  height: 32px;
  flex-shrink: 0;
}

.logo-mark svg {
  width: 100%;
  height: 100%;
}

/* Animated version for hero sections */
.logo-mark.animated .radar-sweep {
  animation: radar-sweep 3s linear infinite;
  transform-origin: center;
}

@keyframes radar-sweep {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* Logo icon (simplified square version for navbar) */
.logo-icon {
  width: 28px;
  height: 28px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  position: relative;
  overflow: hidden;
}

.logo-icon::before {
  content: "";
  position: absolute;
  width: 10px;
  height: 10px;
  border: 2px solid var(--text-inverse);
  border-radius: 50%;
}

.logo-icon::after {
  content: "";
  position: absolute;
  width: 4px;
  height: 4px;
  background: var(--text-inverse);
  border-radius: 50%;
}

/* ============ NAVBAR ============ */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-navbar);
  padding: 0.55rem var(--space-8);
  height: 86px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--navbar-bg);
  backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--navbar-border);
  transition: transform var(--transition-slow), opacity var(--transition-slow);
}

.navbar.hidden-initially {
  transform: translateY(-100%);
  opacity: 0;
}

.navbar.visible {
  transform: translateY(0);
  opacity: 1;
}

.navbar-inner {
  width: 100%;
  max-width: 1200px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 600;
  font-size: var(--text-base);
  letter-spacing: -0.01em;
}

.navbar-links {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  flex: 1;
  flex-wrap: wrap;
  margin-left: var(--space-4);
}

.navbar-link {
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  text-decoration: none;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition-fast), background var(--transition-fast);
}

.navbar-link:hover {
  color: var(--text-primary);
  background: var(--bg-elevated);
}

.navbar-link.active {
  color: var(--text-primary);
  background: var(--bg-elevated-hover);
}

.navbar-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

/* ============ RADAR BUTTON - Premium Apple-Level Design ============ */
.navbar-radar-btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.6rem 1.1rem 0.6rem 0.85rem;
  border-radius: 50px;
  text-decoration: none;
  min-width: auto;
  overflow: hidden;
  isolation: isolate;
  
  /* Multi-layer gradient for depth */
  background: 
    linear-gradient(180deg, rgba(255,255,255,0.18) 0%, rgba(255,255,255,0) 50%),
    linear-gradient(135deg, #1a1a1f 0%, #2d2d35 100%);
  
  /* Refined border with subtle gradient */
  border: 1px solid rgba(255, 255, 255, 0.12);
  
  /* Premium shadow stack: ambient + key light + contact shadow */
  box-shadow:
    0 0 0 1px rgba(0, 0, 0, 0.5),
    0 1px 2px rgba(0, 0, 0, 0.25),
    0 4px 8px rgba(0, 0, 0, 0.2),
    0 8px 16px rgba(0, 0, 0, 0.15),
    inset 0 1px 0 rgba(255, 255, 255, 0.08);
    
  transition: 
    transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1),
    box-shadow 0.3s ease,
    border-color 0.3s ease;
}

/* Inner glow layer */
.navbar-radar-btn::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: radial-gradient(ellipse 80% 50% at 50% 0%, rgba(255,255,255,0.15) 0%, transparent 50%);
  pointer-events: none;
  z-index: 1;
}

/* Subtle accent glow behind */
.navbar-radar-btn::after {
  content: "";
  position: absolute;
  inset: -2px;
  border-radius: 52px;
  background: linear-gradient(135deg, rgba(var(--accent-primary-rgb), 0.25) 0%, rgba(var(--accent-secondary-rgb), 0.15) 100%);
  filter: blur(12px);
  opacity: 0;
  z-index: -1;
  transition: opacity 0.3s ease;
}

.navbar-radar-btn:hover {
  transform: translateY(-1px) scale(1.02);
  border-color: rgba(255, 255, 255, 0.2);
  box-shadow:
    0 0 0 1px rgba(0, 0, 0, 0.4),
    0 2px 4px rgba(0, 0, 0, 0.2),
    0 8px 16px rgba(0, 0, 0, 0.2),
    0 16px 32px rgba(0, 0, 0, 0.15),
    inset 0 1px 0 rgba(255, 255, 255, 0.12);
}

.navbar-radar-btn:hover::after {
  opacity: 1;
}

.navbar-radar-btn:active {
  transform: translateY(0) scale(0.98);
  transition-duration: 0.1s;
}

/* Live status indicator - feels like a real LED */
.navbar-radar-btn .radar-icon {
  position: relative;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: linear-gradient(180deg, #4ade80 0%, #22c55e 100%);
  flex-shrink: 0;
  box-shadow:
    0 0 0 2px rgba(34, 197, 94, 0.2),
    0 0 6px rgba(34, 197, 94, 0.5),
    0 0 12px rgba(34, 197, 94, 0.3),
    inset 0 -1px 2px rgba(0, 0, 0, 0.2),
    inset 0 1px 1px rgba(255, 255, 255, 0.4);
  animation: ledPulse 2.5s ease-in-out infinite;
}

/* Horizontal layout for label */
.navbar-radar-btn .label {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.1rem;
  position: relative;
  z-index: 2;
}

.navbar-radar-btn .label .title {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: #ffffff;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
  line-height: 1.1;
}

.navbar-radar-btn .label .subtitle {
  font-size: 0.55rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.5);
  line-height: 1;
}

/* ============ LIGHT MODE - Refined Glass Morphism ============ */
[data-theme="light"] .navbar-radar-btn {
  background: 
    linear-gradient(180deg, rgba(255,255,255,0.9) 0%, rgba(255,255,255,0.7) 100%);
  border: 1px solid rgba(0, 0, 0, 0.08);
  box-shadow:
    0 0 0 1px rgba(0, 0, 0, 0.04),
    0 1px 2px rgba(0, 0, 0, 0.06),
    0 4px 8px rgba(0, 0, 0, 0.04),
    0 8px 24px rgba(0, 0, 0, 0.06),
    inset 0 1px 0 rgba(255, 255, 255, 1),
    inset 0 -1px 0 rgba(0, 0, 0, 0.02);
  backdrop-filter: blur(20px) saturate(180%);
}

[data-theme="light"] .navbar-radar-btn::before {
  background: radial-gradient(ellipse 80% 50% at 50% 0%, rgba(255,255,255,0.8) 0%, transparent 50%);
}

[data-theme="light"] .navbar-radar-btn::after {
  background: linear-gradient(135deg, rgba(var(--accent-primary-rgb), 0.15) 0%, rgba(var(--accent-secondary-rgb), 0.1) 100%);
  filter: blur(16px);
}

[data-theme="light"] .navbar-radar-btn:hover {
  border-color: rgba(0, 0, 0, 0.12);
  box-shadow:
    0 0 0 1px rgba(0, 0, 0, 0.06),
    0 2px 4px rgba(0, 0, 0, 0.06),
    0 8px 16px rgba(0, 0, 0, 0.06),
    0 16px 32px rgba(0, 0, 0, 0.08),
    inset 0 1px 0 rgba(255, 255, 255, 1),
    inset 0 -1px 0 rgba(0, 0, 0, 0.03);
}

[data-theme="light"] .navbar-radar-btn .label .title {
  color: #1a1a1f;
  text-shadow: none;
}

[data-theme="light"] .navbar-radar-btn .label .subtitle {
  color: rgba(0, 0, 0, 0.45);
}

[data-theme="light"] .navbar-radar-btn .radar-icon {
  box-shadow:
    0 0 0 2px rgba(34, 197, 94, 0.15),
    0 0 4px rgba(34, 197, 94, 0.4),
    0 0 8px rgba(34, 197, 94, 0.2),
    inset 0 -1px 2px rgba(0, 0, 0, 0.15),
    inset 0 1px 1px rgba(255, 255, 255, 0.5);
}

/* LED pulse animation - subtle breathing */
@keyframes ledPulse {
  0%, 100% { 
    opacity: 1; 
    box-shadow:
      0 0 0 2px rgba(34, 197, 94, 0.2),
      0 0 6px rgba(34, 197, 94, 0.5),
      0 0 12px rgba(34, 197, 94, 0.3),
      inset 0 -1px 2px rgba(0, 0, 0, 0.2),
      inset 0 1px 1px rgba(255, 255, 255, 0.4);
  }
  50% { 
    opacity: 0.85;
    box-shadow:
      0 0 0 3px rgba(34, 197, 94, 0.15),
      0 0 10px rgba(34, 197, 94, 0.6),
      0 0 20px rgba(34, 197, 94, 0.35),
      inset 0 -1px 2px rgba(0, 0, 0, 0.2),
      inset 0 1px 1px rgba(255, 255, 255, 0.4);
  }
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .navbar-radar-btn {
    padding: 0.5rem 0.9rem 0.5rem 0.7rem;
    gap: 0.6rem;
  }
  
  .navbar-radar-btn .label .title {
    font-size: 0.75rem;
  }
  
  .navbar-radar-btn .label .subtitle {
    font-size: 0.5rem;
  }
  
  .navbar-radar-btn .radar-icon {
    width: 7px;
    height: 7px;
  }
}

/* ============ THEME TOGGLE ============ */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  border: none;
  background: var(--bg-elevated);
  color: var(--text-secondary);
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast);
  margin-left: var(--space-2);
}

.theme-toggle:hover {
  background: var(--bg-elevated-hover);
  color: var(--text-primary);
}

.theme-toggle:focus-visible {
  outline: 2px solid var(--accent-primary);
  outline-offset: 2px;
}

.theme-toggle .icon-sun,
.theme-toggle .icon-moon {
  width: 18px;
  height: 18px;
}

[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
[data-theme="dark"] .theme-toggle .icon-moon { display: none; }
[data-theme="light"] .theme-toggle .icon-sun { display: none; }
[data-theme="light"] .theme-toggle .icon-moon { display: block; }

/* Default to dark mode icons */
:root .theme-toggle .icon-sun { display: block; }
:root .theme-toggle .icon-moon { display: none; }

/* ============ TYPOGRAPHY ============ */
.heading-hero {
  font-family: var(--font-serif);
  font-size: var(--text-hero);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.heading-1 {
  font-family: var(--font-serif);
  font-size: var(--text-4xl);
  font-weight: 400;
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--text-primary);
}

.heading-2 {
  font-family: var(--font-serif);
  font-size: var(--text-3xl);
  font-weight: 400;
  line-height: 1.2;
  color: var(--text-primary);
}

.heading-3 {
  font-family: var(--font-sans);
  font-size: var(--text-xl);
  font-weight: 600;
  line-height: 1.3;
  color: var(--text-primary);
}

.heading-4 {
  font-family: var(--font-sans);
  font-size: var(--text-lg);
  font-weight: 600;
  line-height: 1.4;
  color: var(--text-primary);
}

.body-large {
  font-size: var(--text-lg);
  line-height: 1.7;
  color: var(--text-secondary);
}

.body-base {
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--text-secondary);
}

.body-small {
  font-size: var(--text-sm);
  line-height: 1.5;
  color: var(--text-muted);
}

.label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
}

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

/* ============ BUTTONS ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-6);
  border-radius: var(--radius-lg);
  border: none;
  font-family: var(--font-sans);
  font-size: var(--text-base);
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: transform var(--transition-base), box-shadow var(--transition-base), background var(--transition-base);
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-primary) 0%, #3dd4b5 100%);
  color: var(--text-inverse);
  box-shadow: 0 4px 20px var(--accent-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px var(--accent-glow);
}

.btn-secondary {
  background: var(--bg-elevated);
  color: var(--text-primary);
  border: 1px solid var(--stroke);
}

.btn-secondary:hover {
  background: var(--bg-elevated-hover);
  border-color: var(--stroke-strong);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
}

.btn-ghost:hover {
  background: var(--bg-elevated);
  color: var(--text-primary);
}

/* ============ CARDS ============ */
.card {
  border-radius: var(--radius-xl);
  border: 1px solid var(--card-border);
  background: var(--card-bg);
  backdrop-filter: blur(40px) saturate(150%);
  box-shadow: var(--card-shadow);
  overflow: hidden;
}

.glass-card {
  border-radius: var(--radius-2xl);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  backdrop-filter: var(--glass-blur);
}

/* ============ SECTION LABEL ============ */
.section-label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent-primary);
  margin-bottom: var(--space-4);
}

.section-label::before {
  content: "";
  width: 12px;
  height: 1px;
  background: var(--accent-primary);
}

/* ============ FOOTER ============ */
.site-footer {
  padding: var(--space-12) var(--space-8);
  text-align: center;
  border-top: 1px solid var(--stroke);
}

.site-footer p {
  font-size: var(--text-sm);
  color: var(--text-muted);
  margin: 0;
}

.site-footer a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.site-footer a:hover {
  color: var(--text-primary);
}

/* ============ ACCESSIBILITY ============ */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.skip-link {
  position: absolute;
  left: var(--space-4);
  top: var(--space-4);
  padding: var(--space-2) var(--space-4);
  background: var(--text-primary);
  color: var(--bg-primary);
  border-radius: var(--radius-full);
  text-decoration: none;
  transform: translateY(-150%);
  transition: transform var(--transition-base);
  font-weight: 600;
  z-index: var(--z-modal);
}

.skip-link:focus-visible {
  transform: translateY(0);
}

/* ============ RESPONSIVE ============ */
@media (max-width: 768px) {
  .navbar {
    padding: 0.35rem var(--space-4);
    height: 74px;
  }

  .navbar-brand span:not(.logo-icon) {
    display: none;
  }

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

  .navbar-links {
    justify-content: center;
    margin-left: 0;
  }

  .navbar-actions {
    width: 100%;
    justify-content: center;
  }

  .navbar-radar-btn {
    width: 100%;
    align-items: center;
    text-align: center;
  }

  .navbar-radar-btn .label .subtitle {
    letter-spacing: 0.12em;
  }
}

@media (max-width: 480px) {
  .navbar-links {
    gap: 0;
  }

  .navbar-link {
    padding: var(--space-2);
    font-size: var(--text-xs);
  }
  
  .theme-toggle {
    width: 32px;
    height: 32px;
  }
}

/* ============ ANIMATIONS ============ */
@keyframes fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slide-up {
  from { 
    opacity: 0;
    transform: translateY(20px);
  }
  to { 
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.animate-fade-in {
  animation: fade-in 0.5s ease forwards;
}

.animate-slide-up {
  animation: slide-up 0.6s ease forwards;
}

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

/* ============ UTILITY CLASSES ============ */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.mx-auto { margin-left: auto; margin-right: auto; }

.max-w-sm { max-width: 480px; }
.max-w-md { max-width: 640px; }
.max-w-lg { max-width: 900px; }
.max-w-xl { max-width: 1100px; }
.max-w-2xl { max-width: 1200px; }