/*
 * Portal Design System
 * Adapted to match CTP Cluj-Napoca branding
 */

/* ========================================
   CSS Variables
   ======================================== */

:root {
  /* Primary Colors - CTP Cluj Brand */
  --color-ink: #222222;
  --color-stone: #444444;
  --color-warm-gray: #666666;

  /* Backgrounds - CTP Cluj Style */
  --color-paper: #ffffff;
  --color-cream: #f7f7f7;
  --color-sand: #e5e5e5;
  --color-dark: #3b3b3c;
  --color-darker: #2f2f30;

  /* Accent - CTP Cluj Red */
  --color-accent: #d9534f;
  --color-accent-dark: #c9302c;
  --color-accent-light: #f8e0df;

  /* Semantic */
  --color-success: #5cb85c;
  --color-success-light: #dff0d8;
  --color-warning: #f0ad4e;
  --color-warning-light: #fcf8e3;
  --color-error: #d9534f;
  --color-error-light: #f8e0df;

  /* Elevation */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.12);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.16);

  /* Typography - CTP Cluj uses Arial/system fonts */
  --font-display: Arial, 'Helvetica Neue', Helvetica, sans-serif;
  --font-body: Arial, 'Helvetica Neue', Helvetica, sans-serif;
  --font-ui: Arial, 'Helvetica Neue', Helvetica, sans-serif;

  /* Type Scale */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;

  /* Line Heights */
  --leading-tight: 1.25;
  --leading-snug: 1.375;
  --leading-normal: 1.6;
  --leading-relaxed: 1.75;

  /* Font Weights */
  --font-normal: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;

  /* Spacing (8px base unit) */
  --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: 3px;
  --radius-md: 4px;
  --radius-lg: 6px;
  --radius-xl: 8px;
  --radius-full: 9999px;

  /* Container Widths */
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1140px;
  --container-xl: 1280px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 200ms ease;
  --transition-slow: 300ms ease;

  /* Z-index layers */
  --z-base: 0;
  --z-above: 10;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-modal: 300;
  --z-toast: 400;
}


/* ========================================
   CSS Reset (Modern)
   ======================================== */

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

* {
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  min-height: 100vh;
  line-height: var(--leading-normal);
  font-family: var(--font-ui);
  font-size: var(--text-base);
  color: var(--color-ink);
  background-color: var(--color-paper);
}

img, picture, video, canvas, svg {
  display: block;
  max-width: 100%;
}

input, button, textarea, select {
  font: inherit;
  color: inherit;
}

button {
  cursor: pointer;
  background: none;
  border: none;
}

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

a:hover {
  color: var(--color-accent-dark);
  text-decoration: underline;
}

ul, ol {
  list-style: none;
}

table {
  border-collapse: collapse;
  border-spacing: 0;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-bold);
  line-height: var(--leading-tight);
  color: var(--color-ink);
}

p {
  line-height: var(--leading-normal);
}


/* ========================================
   Typography Classes
   ======================================== */

/* Display headings */
.display-xl {
  font-size: var(--text-5xl);
  font-weight: var(--font-bold);
  line-height: var(--leading-tight);
}

.display-lg {
  font-size: var(--text-4xl);
  font-weight: var(--font-bold);
  line-height: var(--leading-tight);
}

.display-md {
  font-size: var(--text-3xl);
  font-weight: var(--font-bold);
  line-height: var(--leading-tight);
}

/* Headings */
.heading-xl {
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  line-height: var(--leading-snug);
}

.heading-lg {
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  line-height: var(--leading-snug);
}

.heading-md {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  line-height: var(--leading-snug);
}

.heading-sm {
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  line-height: var(--leading-snug);
}

/* Body text */
.body-lg {
  font-size: var(--text-lg);
  line-height: var(--leading-relaxed);
}

.body-md {
  font-size: var(--text-base);
  line-height: var(--leading-normal);
}

.body-sm {
  font-size: var(--text-sm);
  line-height: var(--leading-normal);
}

/* Utility text */
.text-caption {
  font-size: var(--text-xs);
  line-height: var(--leading-normal);
  color: var(--color-warm-gray);
}

.text-label {
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  line-height: var(--leading-normal);
}

.text-overline {
  font-size: var(--text-xs);
  font-weight: var(--font-bold);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-warm-gray);
}


/* ========================================
   Color Utility Classes
   ======================================== */

.text-ink { color: var(--color-ink); }
.text-stone { color: var(--color-stone); }
.text-muted { color: var(--color-warm-gray); }
.text-accent { color: var(--color-accent); }
.text-success { color: var(--color-success); }
.text-error { color: var(--color-error); }
.text-white { color: white; }

.bg-paper { background-color: var(--color-paper); }
.bg-cream { background-color: var(--color-cream); }
.bg-sand { background-color: var(--color-sand); }
.bg-dark { background-color: var(--color-dark); }
.bg-darker { background-color: var(--color-darker); }
.bg-accent { background-color: var(--color-accent); }
.bg-accent-light { background-color: var(--color-accent-light); }


/* ========================================
   Layout Utilities
   ======================================== */

.container {
  width: 100%;
  max-width: var(--container-lg);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-4);
  padding-right: var(--space-4);
}

.container-sm {
  max-width: var(--container-sm);
}

.container-md {
  max-width: var(--container-md);
}

.stack {
  display: flex;
  flex-direction: column;
}

.stack > * + * {
  margin-top: var(--stack-space, var(--space-4));
}

.stack-sm { --stack-space: var(--space-2); }
.stack-md { --stack-space: var(--space-4); }
.stack-lg { --stack-space: var(--space-6); }
.stack-xl { --stack-space: var(--space-8); }

.row {
  display: flex;
  flex-direction: row;
  align-items: center;
}

.row > * + * {
  margin-left: var(--row-space, var(--space-4));
}

.row-sm { --row-space: var(--space-2); }
.row-md { --row-space: var(--space-4); }
.row-lg { --row-space: var(--space-6); }

.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.justify-end { justify-content: flex-end; }

.items-start { align-items: flex-start; }
.items-center { align-items: center; }
.items-end { align-items: flex-end; }

.flex-1 { flex: 1; }
.flex-wrap { flex-wrap: wrap; }


/* ========================================
   Spacing Utilities
   ======================================== */

.mt-1 { margin-top: var(--space-1); }
.mt-2 { margin-top: var(--space-2); }
.mt-3 { margin-top: var(--space-3); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mt-12 { margin-top: var(--space-12); }

.mb-1 { margin-bottom: var(--space-1); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-3 { margin-bottom: var(--space-3); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }

.ml-auto { margin-left: auto; }
.ml-2 { margin-left: var(--space-2); }
.mr-auto { margin-right: auto; }

.p-2 { padding: var(--space-2); }
.p-3 { padding: var(--space-3); }
.p-4 { padding: var(--space-4); }
.p-6 { padding: var(--space-6); }
.p-8 { padding: var(--space-8); }

.px-4 { padding-left: var(--space-4); padding-right: var(--space-4); }
.px-6 { padding-left: var(--space-6); padding-right: var(--space-6); }
.py-2 { padding-top: var(--space-2); padding-bottom: var(--space-2); }
.py-4 { padding-top: var(--space-4); padding-bottom: var(--space-4); }
.py-6 { padding-top: var(--space-6); padding-bottom: var(--space-6); }
.py-8 { padding-top: var(--space-8); padding-bottom: var(--space-8); }


/* ========================================
   Visibility & Display
   ======================================== */

.hidden { display: none !important; }
.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; }
.text-right { text-align: right; }


/* ========================================
   Animations
   ======================================== */

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20%, 60% { transform: translateX(-4px); }
  40%, 80% { transform: translateX(4px); }
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.animate-fade-in {
  animation: fadeIn var(--transition-base) forwards;
}

.animate-fade-in-up {
  animation: fadeInUp var(--transition-base) forwards;
}

.animate-slide-in-up {
  animation: slideInUp var(--transition-slow) forwards;
}

.animate-scale-in {
  animation: scaleIn var(--transition-base) forwards;
}

.animate-shake {
  animation: shake 0.4s ease-out;
}

/* Staggered animation delays */
.stagger-1 { animation-delay: 50ms; }
.stagger-2 { animation-delay: 100ms; }
.stagger-3 { animation-delay: 150ms; }
.stagger-4 { animation-delay: 200ms; }
.stagger-5 { animation-delay: 250ms; }
.stagger-6 { animation-delay: 300ms; }


/* ========================================
   Responsive Utilities
   ======================================== */

@media (min-width: 768px) {
  .md\:hidden { display: none !important; }
  .md\:block { display: block !important; }
  .md\:flex { display: flex !important; }
  .md\:row { flex-direction: row; }
  .md\:col { flex-direction: column; }
}

@media (min-width: 1024px) {
  .lg\:hidden { display: none !important; }
  .lg\:block { display: block !important; }
  .lg\:flex { display: flex !important; }
}