/* ==========================================
   SOTIS AI - Modern Design System 2025
   ========================================== */

/* CSS Custom Properties (Design Tokens) */
:root {
  /* Colors - Sotis AI Palette */
  --violet-primary: #C09CF0;
  --violet-light: #E5D7F5;
  --violet-dark: #9B7AC4;
  --yellow-primary: #F7E64D;
  --yellow-light: #FFF9D9;
  --yellow-dark: #E5D43E;
  --dark-primary: #3A3A3A;
  --dark-text: #1A1A1A;
  --gray-light: #F5F5F5;
  --gray-medium: #6B6B6B;
  --white: #FFFFFF;

  /* Theme-specific colors (Light Mode) */
  --bg-primary: #F5F5F5;
  --bg-secondary: #FFFFFF;
  --text-primary: #1A1A1A;
  --text-secondary: #6B6B6B;
  --border-color: #D4C4E8;
  --card-bg: #FFFFFF;
  --input-bg: #FFFFFF;
  --footer-bg: #3A3A3A;
  --footer-text: #F5F5F5;

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 3rem;
  --space-xl: 4rem;

  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(192, 156, 240, 0.1);
  --shadow-md: 0 4px 16px rgba(192, 156, 240, 0.15);
  --shadow-lg: 0 8px 24px rgba(192, 156, 240, 0.2);
  --shadow-hover: 0 8px 32px rgba(192, 156, 240, 0.25);

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;

  /* Typography */
  --font-base: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-bold: 700;
}

/* Dark Mode Theme */
[data-theme="dark"] {
  --bg-primary: #1A1A1A;
  --bg-secondary: #2A2A2A;
  --text-primary: #F5F5F5;
  --text-secondary: #B0B0B0;
  --border-color: #4A4A4A;
  --card-bg: #2A2A2A;
  --input-bg: #2A2A2A;
  --footer-bg: #0A0A0A;
  --footer-text: #F5F5F5;
  --gray-light: #2A2A2A;

  /* Adjust yellow backgrounds for better contrast in dark mode */
  --yellow-light: #4A4520;
}

/* ==========================================
   RESET & BASE STYLES
   ========================================== */

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

body {
  font-family: var(--font-base);
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: background-color var(--transition-base), color var(--transition-base);
}

a {
  color: inherit;
  text-decoration: none;
}

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

/* ==========================================
   HEADER & NAVIGATION
   ========================================== */

header {
  background: linear-gradient(135deg, var(--violet-primary) 0%, var(--violet-dark) 100%);
  color: var(--white);
  padding: var(--space-sm) 0;
  box-shadow: var(--shadow-md);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  color: var(--white);
  text-decoration: none;
  font-size: 1.5rem;
  font-weight: var(--font-weight-bold);
  transition: transform var(--transition-base);
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo:hover {
  transform: scale(1.05);
}

.logo-img {
  height: 45px;
  width: auto;
  display: block;
}

/* Show correct logo based on theme */
.logo-light {
  display: block;
}
.logo-dark {
  display: none;
}
[data-theme="dark"] .logo-light {
  display: none;
}
[data-theme="dark"] .logo-dark {
  display: block;
}

.logo-text {
  font-size: 1.25rem;
  font-weight: var(--font-weight-bold);
  color: var(--white);
}

.nav-links {
  list-style: none;
  display: flex;
  gap: var(--space-md);
  align-items: center;
}

.nav-links a {
  color: var(--white);
  text-decoration: none;
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  transition: all var(--transition-base);
  font-weight: var(--font-weight-medium);
}

.nav-links a:hover {
  background-color: var(--yellow-primary);
  color: var(--dark-primary);
  transform: translateY(-2px);
}

/* Logout button styled as nav link */
.logout-button {
  background: none;
  border: none;
  outline: none;
  color: var(--white);
  cursor: pointer;
  font-size: inherit;
  font-family: inherit;
  padding: var(--space-xs) var(--space-sm);
  margin: 0;
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: all var(--transition-base);
  font-weight: var(--font-weight-medium);
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
}

.logout-button:hover {
  background-color: var(--yellow-primary);
  color: var(--dark-primary);
  transform: translateY(-2px);
}

.logout-button:focus {
  outline: 2px solid var(--yellow-primary);
  outline-offset: 2px;
}

/* Dropdown Menu */
.dropdown {
  position: relative;
}

.dropdown-toggle {
  cursor: pointer;
}

.dropdown-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  background: linear-gradient(135deg, var(--violet-primary) 0%, var(--violet-dark) 100%);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 4px;
  min-width: 150px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
  list-style: none;
  padding: 0.5rem 0;
  margin: 0;
  z-index: 1000;
}

.dropdown:hover .dropdown-menu {
  display: block;
}

.dropdown-menu li {
  margin: 0;
}

.dropdown-menu a {
  display: block;
  padding: 0.5rem 1rem;
  color: var(--white);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.dropdown-menu a:hover {
  background-color: var(--yellow-primary);
  color: var(--dark-primary);
}

/* Dropdown logout button - style comme un lien */
.dropdown-logout-button {
  display: block;
  width: 100%;
  padding: 0.5rem 1rem;
  color: var(--white);
  text-decoration: none;
  background: none;
  border: none;
  text-align: left;
  cursor: pointer;
  font-family: inherit;
  font-size: inherit;
  transition: all var(--transition-fast);
}

.dropdown-logout-button:hover {
  background-color: var(--yellow-primary);
  color: var(--dark-primary);
}

/* Theme Toggle Button */
.theme-toggle {
  background: none;
  border: 2px solid var(--white);
  color: var(--white);
  cursor: pointer;
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  font-size: 1.2rem;
  transition: all var(--transition-base);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
}

.theme-toggle:hover {
  background-color: var(--yellow-primary);
  color: var(--dark-primary);
  border-color: var(--yellow-primary);
  transform: rotate(15deg);
}

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

/* Hide light/dark icons based on theme */
[data-theme="light"] .icon-moon {
  display: inline;
}

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

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

[data-theme="dark"] .icon-sun {
  display: inline;
}

/* ==========================================
   MAIN CONTENT
   ========================================== */

main {
  max-width: 1200px;
  margin: var(--space-md) auto;
  padding: 0 var(--space-md);
  min-height: calc(100vh - 200px);
  flex: 1;
}

/* ==========================================
   MESSAGES & ALERTS
   ========================================== */

.messages {
  position: fixed;
  top: 80px;
  right: var(--space-md);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  max-width: 400px;
}

.message {
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  border-left: 4px solid;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  animation: slideInRight 0.3s ease-out;
  transition: opacity 0.5s ease-out, transform 0.5s ease-out;
}

.message.fade-out {
  opacity: 0;
  transform: translateX(20px);
}

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

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

.message.success {
  background-color: var(--violet-light);
  color: var(--violet-dark);
  border-color: var(--violet-primary);
}

.message.error {
  background-color: #ffe5e5;
  color: #cc0000;
  border-color: #ff3333;
}

.message.info {
  background-color: var(--yellow-light);
  color: var(--dark-primary);
  border-color: var(--yellow-primary);
}

.message.warning {
  background-color: var(--yellow-light);
  color: var(--dark-primary);
  border-color: var(--yellow-dark);
}

/* Dark mode message styles */
[data-theme="dark"] .message.success {
  background-color: rgba(138, 130, 220, 0.2);
  color: var(--violet-light);
  border-color: var(--violet-primary);
}

[data-theme="dark"] .message.error {
  background-color: rgba(255, 51, 51, 0.2);
  color: #ffcccc;
  border-color: #ff6666;
}

[data-theme="dark"] .message.info {
  background-color: rgba(255, 193, 7, 0.2);
  color: var(--text-primary);
  border-color: var(--yellow-primary);
}

[data-theme="dark"] .message.warning {
  background-color: rgba(255, 193, 7, 0.2);
  color: var(--text-primary);
  border-color: var(--yellow-dark);
}

/* ==========================================
   BUTTONS
   ========================================== */

.btn-primary,
.btn-secondary {
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
  text-align: center;
  transition: all var(--transition-base);
  box-shadow: var(--shadow-sm);
}

.btn-primary {
  background-color: var(--yellow-primary);
  color: var(--dark-primary);
}

.btn-primary:hover {
  background-color: var(--yellow-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

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

.btn-secondary {
  background-color: var(--violet-primary);
  color: var(--white);
}

.btn-secondary:hover {
  background-color: var(--violet-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

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

.btn-primary:focus,
.btn-secondary:focus {
  outline: 2px solid var(--yellow-primary);
  outline-offset: 2px;
}

/* ==========================================
   FORMS & INPUTS
   ========================================== */

.auth-container {
  max-width: 450px;
  margin: var(--space-md) auto;
  background: var(--card-bg);
  padding: var(--space-lg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

.auth-container h1 {
  margin-bottom: var(--space-md);
  color: var(--violet-dark);
  text-align: center;
}

.auth-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.form-group {
  display: flex;
  flex-direction: column;
}

.form-group label {
  margin-bottom: var(--space-xs);
  font-weight: var(--font-weight-medium);
  color: var(--text-primary);
}

.form-group input,
.form-group textarea,
.form-group select {
  padding: 0.75rem;
  border: 2px solid var(--violet-light);
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-family: inherit;
  transition: all var(--transition-base);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--violet-primary);
  box-shadow: 0 0 0 3px var(--violet-light);
}

.form-group input:hover,
.form-group textarea:hover,
.form-group select:hover {
  border-color: var(--violet-primary);
}

.help-text {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-top: 0.25rem;
}

.field-error {
  color: #cc0000;
  font-size: 0.875rem;
  margin-top: 0.25rem;
  font-weight: var(--font-weight-medium);
}

.form-errors {
  background-color: #ffe5e5;
  color: #cc0000;
  padding: var(--space-sm);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-sm);
  border-left: 4px solid #ff3333;
}

.auth-link {
  text-align: center;
  margin-top: var(--space-sm);
  color: var(--text-secondary);
}

.auth-link a {
  color: var(--violet-primary);
  text-decoration: none;
  font-weight: var(--font-weight-medium);
  transition: color var(--transition-base);
}

.auth-link a:hover {
  color: var(--violet-dark);
  text-decoration: underline;
}

/* ==========================================
   PAGE HEADER (Unified style for all apps)
   ========================================== */

.page-header {
  text-align: center;
  margin-bottom: var(--space-md);
}

.page-header h1 {
  color: var(--violet-dark);
  margin-bottom: var(--space-xs);
  font-size: 2.5rem;
}

.page-header .subtitle,
.page-header p {
  color: var(--text-secondary);
  font-size: 1.1rem;
}

/* ==========================================
   HOME PAGE
   ========================================== */

.home-container {
  padding: var(--space-md) 0;
  position: relative;
}

.hero {
  text-align: center;
  padding: var(--space-xl) var(--space-md);
  position: relative;
  overflow: hidden;
  border-radius: 0;
  margin-bottom: var(--space-md);
  /* Soft edges (all sides) */
  mask-image: linear-gradient(
    to bottom,
    transparent 0%,
    black 15%,
    black 85%,
    transparent 100%
  ),
  linear-gradient(
    to right,
    transparent 0%,
    black 3%,
    black 97%,
    transparent 100%
  );
  mask-composite: intersect;
  -webkit-mask-image: linear-gradient(
    to bottom,
    transparent 0%,
    black 15%,
    black 85%,
    transparent 100%
  ),
  linear-gradient(
    to right,
    transparent 0%,
    black 3%,
    black 97%,
    transparent 100%
  );
  -webkit-mask-composite: source-in;
}

/* Decorative blob background */
.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -10%;
  width: 600px;
  height: 600px;
  background: var(--violet-dark);
  opacity: 0.22;
  border-radius: 50% 40% 60% 50%;
  filter: blur(20px);
  z-index: -1;
}

/* Dark mode blob */
[data-theme="dark"] .hero::before {
  opacity: 0.08;
}

/* Particles container */
.particles-container {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  pointer-events: none;
  z-index: 0;
}

/* Individual particle */
.particle {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
  will-change: transform;
}

[data-theme="dark"] .particle {
  opacity: 0.5;
}

/* Typing effect for subtitle */
.hero-subtitle {
  display: inline-block;
  overflow: hidden;
  white-space: nowrap;
  border-right: 3px solid var(--violet-primary);
  animation:
    typing 3s steps(45, end) forwards,
    blink 0.75s step-end infinite;
  max-width: 0;
  width: fit-content;
}

@keyframes typing {
  from { max-width: 0; }
  to { max-width: 50ch; }
}

@keyframes blink {
  50% { border-color: transparent; }
}

/* After typing completes, keep cursor blinking */
.hero-subtitle.typed {
  max-width: 50ch;
}

/* Mobile: disable typing animation */
@media (max-width: 768px) {
  .hero-subtitle {
    white-space: normal;
    width: 100%;
    border-right: none;
    animation: fadeInUp 0.8s ease forwards;
  }

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

.hero h1 {
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
  font-size: 3rem;
  font-weight: var(--font-weight-bold);
}

.hero h1 .highlight {
  color: var(--violet-primary);
  position: relative;
}

.hero h1 .highlight::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 8px;
  background: var(--yellow-primary);
  opacity: 0.5;
  z-index: -1;
  border-radius: var(--radius-sm);
}

.hero-subtitle {
  color: var(--text-secondary);
  font-size: 1.25rem;
  margin-bottom: var(--space-md);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.welcome-message {
  color: var(--violet-dark);
  font-size: 1.1rem;
  margin-top: var(--space-md);
  font-weight: var(--font-weight-medium);
}

.cta-buttons {
  margin-top: var(--space-md);
  display: flex;
  gap: var(--space-sm);
  justify-content: center;
  flex-wrap: wrap;
}

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-md);
  margin-top: var(--space-xl);
}

.feature-card {
  background: var(--card-bg);
  padding: var(--space-lg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  text-align: center;
  transition: all var(--transition-base);
  border: 2px solid var(--border-color);
}

.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-hover);
  border-color: var(--violet-primary);
}

.feature-card h3 {
  color: var(--violet-dark);
  margin-bottom: var(--space-sm);
  font-size: 1.25rem;
}

.feature-card p {
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ==========================================
   ABOUT PAGE
   ========================================== */

.about-container {
  max-width: 900px;
  margin: 0 auto;
}

.about-header {
  text-align: center;
  margin-bottom: var(--space-xl);
}

.about-header h1 {
  color: var(--violet-dark);
  margin-bottom: var(--space-sm);
  font-size: 2.5rem;
}

.tagline {
  color: var(--text-secondary);
  font-size: 1.2rem;
}

.about-section {
  background: var(--card-bg);
  padding: var(--space-lg);
  margin-bottom: var(--space-md);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.about-section h2 {
  color: var(--violet-dark);
  margin-bottom: var(--space-sm);
  border-bottom: 3px solid var(--yellow-primary);
  padding-bottom: var(--space-xs);
  display: inline-block;
}

.about-section p {
  color: var(--text-primary);
  line-height: 1.8;
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-md);
  margin-top: var(--space-sm);
}

.skill-category {
  background: var(--violet-light);
  padding: var(--space-sm);
  border-radius: var(--radius-md);
  border-left: 4px solid var(--violet-primary);
  color: var(--dark-primary);
}

.skill-category h3 {
  color: var(--violet-dark);
  font-size: 1rem;
  margin-bottom: var(--space-xs);
  font-weight: var(--font-weight-bold);
}

.skill-category ul {
  list-style: none;
  padding: 0;
}

.skill-category li {
  padding: 0.25rem 0;
  color: var(--dark-primary);
  position: relative;
  padding-left: 1.25rem;
}

.skill-category li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--violet-dark);
  font-weight: var(--font-weight-bold);
}

/* ==========================================
   PROJECTS
   ========================================== */

.projects-container {
  max-width: 1200px;
  margin: 0 auto;
}

.projects-container h1 {
  color: var(--violet-dark);
  margin-bottom: var(--space-md);
  text-align: center;
  font-size: 2.5rem;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--space-md);
  margin-bottom: var(--space-md);
}

.project-card {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
  border: 2px solid var(--border-color);
}

.project-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-hover);
  border-color: var(--violet-primary);
}

.project-image {
  width: 100%;
  height: 220px;
  object-fit: cover;
}

.project-content {
  padding: var(--space-md);
}

.badge-featured {
  display: inline-block;
  background: linear-gradient(135deg, var(--yellow-primary) 0%, var(--yellow-dark) 100%);
  color: var(--dark-primary);
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  margin-bottom: var(--space-xs);
  font-weight: var(--font-weight-bold);
}

.project-card h2 {
  color: var(--violet-dark);
  font-size: 1.25rem;
  margin-bottom: var(--space-xs);
}

.project-description {
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
  line-height: 1.6;
}

.project-tech {
  color: var(--violet-primary);
  font-size: 0.875rem;
  margin-bottom: var(--space-sm);
  font-weight: var(--font-weight-medium);
}

.no-projects {
  text-align: center;
  color: var(--text-secondary);
  font-size: 1.1rem;
  padding: var(--space-xl);
}

/* ==========================================
   PAGINATION
   ========================================== */

.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-sm);
  margin: var(--space-md) 0;
}

.pagination a {
  padding: var(--space-xs) var(--space-sm);
  background-color: var(--violet-primary);
  color: var(--white);
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: all var(--transition-base);
  font-weight: var(--font-weight-medium);
}

.pagination a:hover {
  background-color: var(--violet-dark);
  transform: translateY(-2px);
}

.current-page {
  color: var(--text-primary);
  font-weight: var(--font-weight-bold);
}

/* ==========================================
   PROJECT DETAIL
   ========================================== */

.project-detail-container {
  max-width: 900px;
  margin: 0 auto;
}

.project-detail {
  background: var(--card-bg);
  padding: var(--space-lg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.project-header {
  background: none;
  padding: 0;
  box-shadow: none;
  position: static;
  margin-bottom: var(--space-md);
  color: inherit;
}

.project-header h1 {
  margin-bottom: var(--space-xs);
}

.project-meta {
  color: var(--text-secondary);
  margin-bottom: var(--space-md);
}

.project-detail-image {
  width: 100%;
  max-height: 450px;
  object-fit: cover;
  border-radius: var(--radius-md);
  margin-bottom: var(--space-md);
}

.project-body {
  margin-bottom: var(--space-md);
}

.project-body h2 {
  font-size: 1.5rem;
  margin-bottom: var(--space-sm);
  border-bottom: 3px solid var(--yellow-primary);
  padding-bottom: var(--space-xs);
  display: inline-block;
}

.project-body p {
  color: var(--text-primary);
  line-height: 1.8;
  margin-bottom: var(--space-sm);
}

.project-links {
  display: flex;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
  flex-wrap: wrap;
}

.back-link {
  color: var(--violet-primary);
  text-decoration: none;
  display: inline-block;
  margin-top: var(--space-sm);
  font-weight: var(--font-weight-medium);
  transition: color var(--transition-base);
}

.back-link:hover {
  color: var(--violet-dark);
  text-decoration: underline;
}

/* ==========================================
   CHAT INTERFACE
   ========================================== */

.chat-container {
  max-width: 900px;
  margin: 0 auto;
}

.chat-header {
  text-align: center;
  margin-bottom: var(--space-md);
}

.chat-header h1 {
  color: var(--violet-dark);
  margin-bottom: var(--space-xs);
  font-size: 2.5rem;
}

.chat-description {
  color: var(--text-secondary);
  font-size: 1.1rem;
}

.quota-info {
  background: var(--violet-light);
  padding: var(--space-sm);
  border-radius: var(--radius-md);
  text-align: center;
  margin-bottom: var(--space-md);
  border-left: 4px solid var(--violet-primary);
  color: var(--dark-primary);
}

.quota-info strong {
  color: var(--violet-dark);
}

.chat-box {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  height: 600px;
}

.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-md);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.chat-message {
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  max-width: 80%;
  animation: messageSlide var(--transition-base);
}

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

.chat-message.user {
  background-color: var(--violet-light);
  border: 2px solid var(--violet-primary);
  align-self: flex-end;
  border-bottom-right-radius: 4px;
  color: var(--dark-primary);
}

.chat-message.assistant {
  background-color: var(--gray-light);
  border: 2px solid var(--yellow-primary);
  align-self: flex-start;
  border-bottom-left-radius: 4px;
}

.chat-message-role {
  font-weight: var(--font-weight-bold);
  font-size: 0.875rem;
  margin-bottom: 0.25rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.chat-message.user .chat-message-role {
  color: var(--violet-dark);
}

.chat-message.assistant .chat-message-role {
  color: var(--text-primary);
}

.chat-message-content {
  color: var(--text-primary);
  line-height: 1.6;
  white-space: pre-wrap;
}

/* Force dark text on light violet background for user messages */
.chat-message.user .chat-message-content {
  color: var(--dark-primary);
}

.chat-input-container {
  padding: var(--space-md);
  background: var(--gray-light);
  border-top: 2px solid var(--violet-light);
}

.chat-form {
  display: flex;
  gap: var(--space-sm);
}

.chat-input {
  flex: 1;
  padding: var(--space-sm);
  border: 2px solid var(--violet-light);
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-family: inherit;
  transition: all var(--transition-base);
}

.chat-input:focus {
  outline: none;
  border-color: var(--violet-primary);
  box-shadow: 0 0 0 3px var(--violet-light);
}

.chat-submit {
  padding: var(--space-sm) var(--space-md);
  background: var(--yellow-primary);
  color: var(--dark-primary);
  border: none;
  border-radius: var(--radius-md);
  font-weight: var(--font-weight-bold);
  cursor: pointer;
  transition: all var(--transition-base);
  box-shadow: var(--shadow-sm);
}

.chat-submit:hover {
  background: var(--yellow-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.chat-submit:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.loading-indicator {
  padding: var(--space-sm);
  text-align: center;
  color: var(--violet-primary);
  font-style: italic;
}

/* ==========================================
   FOOTER
   ========================================== */

footer {
  background-color: var(--footer-bg);
  color: var(--footer-text);
  text-align: center;
  padding: var(--space-md);
  margin-top: auto;
}

footer a {
  color: var(--violet-primary);
  transition: color var(--transition-base);
}

footer a:hover {
  color: var(--yellow-primary);
}

/* ==========================================
   UTILITY CLASSES
   ========================================== */

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

.mb-1 {
  margin-bottom: var(--space-sm);
}

.mb-2 {
  margin-bottom: var(--space-md);
}

.mt-1 {
  margin-top: var(--space-sm);
}

.mt-2 {
  margin-top: var(--space-md);
}

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

@media (max-width: 768px) {
  :root {
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 2.5rem;
  }

  .nav-container {
    flex-direction: column;
    gap: var(--space-sm);
  }

  .logo-img {
    height: 35px;
  }

  .logo-text {
    font-size: 1.1rem;
  }

  .nav-links {
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-sm);
  }

  .hero h1 {
    font-size: 2rem;
  }

  .hero-subtitle {
    font-size: 1.1rem;
  }

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

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

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

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

  .chat-box {
    height: 500px;
  }

  .chat-message {
    max-width: 90%;
  }

  main {
    padding: 0 var(--space-sm);
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 1.75rem;
  }

  .auth-container {
    padding: var(--space-md);
  }

  .about-header h1,
  .projects-container h1,
  .chat-header h1 {
    font-size: 2rem;
  }
}

/* ==========================================
   ANIMATIONS & LOADING STATES
   ========================================== */

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

.spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 3px solid var(--violet-light);
  border-top-color: var(--violet-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

/* Smooth scrolling */
html {
  scroll-behavior: smooth;
}

/* Focus visible for accessibility */
:focus-visible {
  outline: 2px solid var(--yellow-primary);
  outline-offset: 2px;
}