/* ============================================
   CSS Variables & Theme Configuration
   ============================================ */

:root {
  /* Brand Colors */
  --yellow: #ffd24c;
  --light-yellow: #ffe69a;
  --blue: #92b4ec;
  --white: #ffffff;
  --black: #2e2b28;
  --grey: #f2f2f2;

  /* Light Theme */
  --bg-primary: var(--white);
  --bg-secondary: var(--grey);
  --text-primary: var(--black);
  --text-secondary: #666666;
  --card-bg: var(--white);
  --card-shadow: rgba(46, 43, 40, 0.08);
  --card-hover-shadow: rgba(46, 43, 40, 0.15);
  --border-color: rgba(46, 43, 40, 0.1);

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;

  /* Animation */
  --transition-speed: 0.3s;
  --transition-smooth: cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
  --bg-primary: #1a1816;
  --bg-secondary: #2e2b28;
  --text-primary: #f2f2f2;
  --text-secondary: #b8b5b2;
  --card-bg: #2e2b28;
  --card-shadow: rgba(0, 0, 0, 0.3);
  --card-hover-shadow: rgba(0, 0, 0, 0.5);
  --border-color: rgba(255, 255, 255, 0.1);
}

/* ============================================
   Reset & Base Styles
   ============================================ */

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Montserrat", -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  transition: background-color var(--transition-speed) var(--transition-smooth),
    color var(--transition-speed) var(--transition-smooth);
  overflow-x: hidden;
}

/* ============================================
   Theme Toggle Button
   ============================================ */

.theme-toggle {
  position: fixed;
  top: 1.5rem;
  right: 1.5rem;
  width: 50px;
  height: 50px;
  background: var(--card-bg);
  border: 2px solid var(--border-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 1000;
  transition: all var(--transition-speed) var(--transition-smooth);
  box-shadow: 0 4px 12px var(--card-shadow);
}

.theme-toggle:hover {
  transform: scale(1.1) rotate(10deg);
  box-shadow: 0 6px 20px var(--card-hover-shadow);
}

.theme-toggle:active {
  transform: scale(0.95);
}

.theme-icon {
  position: absolute;
  transition: all var(--transition-speed) var(--transition-smooth);
  color: var(--text-primary);
}

.sun-icon {
  opacity: 1;
  transform: rotate(0deg) scale(1);
}

.moon-icon {
  opacity: 0;
  transform: rotate(90deg) scale(0.5);
}

[data-theme="dark"] .sun-icon {
  opacity: 0;
  transform: rotate(-90deg) scale(0.5);
}

[data-theme="dark"] .moon-icon {
  opacity: 1;
  transform: rotate(0deg) scale(1);
}

/* ============================================
   Container & Layout
   ============================================ */

.container {
  max-width: 680px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
  position: relative;
  z-index: 1;
}

@media (min-width: 768px) {
  .container {
    padding: 3rem 2rem;
  }
}

/* ============================================
   Profile Section
   ============================================ */

.profile-section {
  text-align: center;
  margin-bottom: var(--spacing-xl);
  animation: fadeInDown 0.8s var(--transition-smooth);
}

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.avatar {
  width: 120px;
  height: 120px;
  margin: 0 auto var(--spacing-md);
  background: linear-gradient(135deg, var(--blue), var(--yellow));
  border-radius: 50%;
  padding: 4px;
  animation: pulse 2s ease-in-out infinite;
  overflow: hidden;
}

@keyframes pulse {
  0%,
  100% {
    box-shadow: 0 0 0 0 rgba(146, 180, 236, 0.4);
  }
  50% {
    box-shadow: 0 0 0 15px rgba(146, 180, 236, 0);
  }
}

.avatar-image {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
  display: block;
}

.logo {
  position: relative;
  display: inline-block;
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: 2px;
  margin-bottom: var(--spacing-sm);
  padding-bottom: 8px;
  font-family: "Montserrat", monospace;
}

.logo span {
  color: var(--blue);
}

.logo::before {
  content: "";
  position: absolute;
  bottom: 15px;
  left: 50%;
  transform: translateX(-50%);
  width: 150px;
  height: 10px;
  background-color: var(--light-yellow);
  opacity: 0.75;
  z-index: -1;
  animation: slideIn 0.6s var(--transition-smooth) 0.3s backwards;
}

@keyframes slideIn {
  from {
    width: 0;
    opacity: 0;
  }
  to {
    width: 150px;
    opacity: 0.75;
  }
}

@media (min-width: 768px) {
  .logo {
    font-size: 3.5rem;
  }

  .logo::before {
    height: 15px;
    bottom: 27px;
    width: 200px;
  }

  @keyframes slideIn {
    from {
      width: 0;
      opacity: 0;
    }
    to {
      width: 200px;
      opacity: 0.75;
    }
  }
}

.subtitle {
  font-size: 1rem;
  color: var(--text-secondary);
  font-weight: 400;
  letter-spacing: 0.5px;
}

@media (min-width: 768px) {
  .subtitle {
    font-size: 1.125rem;
  }
}

/* ============================================
   Links Section
   ============================================ */

.links-section {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  animation: fadeInUp 0.8s var(--transition-smooth) 0.2s backwards;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.link-card {
  position: relative;
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem 1.5rem;
  background: var(--card-bg);
  border: 2px solid var(--border-color);
  border-radius: 16px;
  text-decoration: none;
  color: var(--text-primary);
  transition: all var(--transition-speed) var(--transition-smooth);
  box-shadow: 0 2px 8px var(--card-shadow);
  overflow: hidden;
}

.link-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, var(--yellow), var(--blue));
  opacity: 0;
  transition: opacity var(--transition-speed) var(--transition-smooth);
  z-index: -1;
}

.link-card:hover::before {
  opacity: 0.08;
}

.link-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px var(--card-hover-shadow);
  border-color: var(--yellow);
}

.link-card:active {
  transform: translateY(-2px);
}

/* Staggered animation for cards */
.link-card:nth-child(1) {
  animation-delay: 0.3s;
}
.link-card:nth-child(2) {
  animation-delay: 0.4s;
}
.link-card:nth-child(3) {
  animation-delay: 0.5s;
}
.link-card:nth-child(4) {
  animation-delay: 0.6s;
}
.link-card:nth-child(5) {
  animation-delay: 0.7s;
}

.link-icon {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--yellow), var(--light-yellow));
  border-radius: 12px;
  transition: all var(--transition-speed) var(--transition-smooth);
}

.link-card:hover .link-icon {
  transform: rotate(8deg) scale(1.1);
}

.link-icon svg {
  width: 24px;
  height: 24px;
  color: var(--black);
}

.link-icon .icon-svg {
  width: 24px;
  height: 24px;
  display: block;
  filter: brightness(0) saturate(100%);
}

[data-theme="dark"] .link-icon .icon-svg {
  filter: brightness(0) saturate(100%) invert(10%);
}

.link-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.link-title {
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.link-subtitle {
  font-size: 0.875rem;
  color: var(--text-secondary);
  font-weight: 400;
}

.link-arrow {
  flex-shrink: 0;
  color: var(--blue);
  transition: transform var(--transition-speed) var(--transition-smooth);
}

.link-card:hover .link-arrow {
  transform: translateX(5px);
}

/* ============================================
   Disabled Card (Portfolio)
   ============================================ */

.link-card.disabled {
  pointer-events: none;
  opacity: 0.5;
  cursor: not-allowed;
}

.link-card.disabled .link-icon {
  background: var(--bg-secondary);
}

.link-card.disabled .link-icon svg {
  color: var(--text-secondary);
}

.link-card.disabled:hover {
  transform: none;
  box-shadow: 0 2px 8px var(--card-shadow);
  border-color: var(--border-color);
}

.link-badge {
  flex-shrink: 0;
  padding: 0.375rem 0.875rem;
  background: var(--bg-secondary);
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* ============================================
   Footer
   ============================================ */

.footer {
  text-align: center;
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--border-color);
  animation: fadeIn 1s var(--transition-smooth) 0.8s backwards;
}

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

.footer p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  font-weight: 400;
}

/* ============================================
   Background Decoration
   ============================================ */

.background-decoration {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.background-decoration::before {
  content: "";
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--light-yellow) 0%, transparent 70%);
  opacity: 0.15;
  animation: float 20s ease-in-out infinite;
}

.background-decoration::after {
  content: "";
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, var(--blue) 0%, transparent 70%);
  opacity: 0.1;
  animation: float 25s ease-in-out infinite reverse;
}

@keyframes float {
  0%,
  100% {
    transform: translate(0, 0) rotate(0deg);
  }
  33% {
    transform: translate(30px, -30px) rotate(120deg);
  }
  66% {
    transform: translate(-20px, 20px) rotate(240deg);
  }
}

/* ============================================
   Responsive Adjustments
   ============================================ */

@media (max-width: 480px) {
  .theme-toggle {
    width: 44px;
    height: 44px;
    top: 1rem;
    right: 1rem;
  }

  .logo {
    font-size: 2rem;
  }

  .link-card {
    padding: 1rem 1.25rem;
  }

  .link-icon {
    width: 44px;
    height: 44px;
  }

  .link-icon svg {
    width: 22px;
    height: 22px;
  }

  .link-title {
    font-size: 1rem;
  }
}

/* ============================================
   Accessibility
   ============================================ */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Focus styles for accessibility */
.theme-toggle:focus-visible,
.link-card:focus-visible {
  outline: 3px solid var(--blue);
  outline-offset: 3px;
}