/* ========== DESIGN SYSTEM VARIABLES ========== */
:root {
  --bg-primary: #0a0a0a;
  --bg-secondary: #1a1a1a;
  --bg-tertiary: #2a2a2a;
  --text-primary: #ffffff;
  --text-secondary: #cccccc;
  --text-muted: #888888;
  --accent: #ff6b6b;
  --accent-hover: #ff5252;
  --border: #333333;
  --shadow: rgba(0, 0, 0, 0.3);
  --glass-bg: rgba(255, 255, 255, 0.1);
  --glass-border: rgba(255, 255, 255, 0.2);
}

[data-theme="light"] {
  --bg-primary: #f8f9fa;
  --bg-secondary: #ffffff;
  --bg-tertiary: #e9ecef;
  --text-primary: #212529;
  --text-secondary: #495057;
  --text-muted: #6c757d;
  --accent: #007bff;
  --accent-hover: #0056b3;
  --border: #dee2e6;
  --shadow: rgba(0, 0, 0, 0.1);
  --glass-bg: rgba(0, 0, 0, 0.05);
  --glass-border: rgba(0, 0, 0, 0.1);
}

/* ========== GLOBAL STYLES ========== */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  transition: background 1.2s cubic-bezier(0.25, 0.46, 0.45, 0.94), color 1.2s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  animation: pageLoad 1.2s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  padding-top: 5rem;
}

@keyframes pageLoad {
  from {
    opacity: 0;
    transform: translateY(30px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* ========== NAVBAR ========== */
.navbar {
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--glass-border);
  padding: 1rem 0;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  transition: transform 0.5s ease, opacity 0.5s ease;
  animation: navbarSlideDown 1s cubic-bezier(0.25, 0.46, 0.45, 0.94) 0.2s both;
  transform: translateY(0);
  opacity: 1;
}

@keyframes navbarSlideDown {
  from {
    transform: translateY(-100%) scale(0.95);
    opacity: 0;
  }
  to {
    transform: translateY(0) scale(1);
    opacity: 1;
  }
}

.navbar-brand {
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--accent) !important;
  text-decoration: none;
  transition: color 0.3s ease;
}

.navbar-brand:hover {
  color: var(--accent-hover) !important;
}

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

.navbar-nav .nav-link {
  color: var(--text-secondary) !important;
  transition: color 0.3s ease;
  margin: 0 0.5rem;
}

.navbar-nav .nav-link:hover {
  color: var(--accent) !important;
}

.navbar-toggler {
  border: 1px solid var(--glass-border) !important;
  color: var(--text-primary) !important;
}

.navbar-toggler:focus {
  outline: none;
  box-shadow: 0 0 0 0.25rem rgba(255, 107, 107, 0.25);
}

.navbar-collapse {
  background: inherit;
  border-radius: 0 0 12px 12px;
  padding: 1rem 0;
  margin-top: 0;
}

.navbar-collapse .navbar-nav .nav-link {
  color: var(--text-primary) !important;
  padding: 0.75rem 1.5rem !important;
  transition: all 0.3s ease;
}

.navbar-collapse .navbar-nav .nav-link:hover {
  background: var(--bg-tertiary);
  padding-left: 2rem !important;
  color: var(--accent) !important;
}

.theme-toggle {
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.2rem;
  cursor: pointer;
  padding: 0.5rem;
  border-radius: 50%;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
}

.theme-toggle:hover {
  background: var(--glass-bg);
  transform: scale(1.1);
}

/* ========== CONTAINER ========== */
.container {
  max-width: none;
  margin: 0 auto;
  padding: 2rem 1rem;
  position: relative;
}

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

@media (min-width: 1024px) {
  .container {
    padding-left: 0;
    padding-right: 0;
    padding: 3rem 2rem;
  }
}

/* ========== FORMS ========== */
.form-control,
.form-select,
textarea.form-control {
  background: var(--bg-secondary);
  border: 1px solid var(--glass-border);
  color: var(--text-primary) !important;
  padding: 1rem 1.5rem;
  border-radius: 12px;
  font-size: 1rem;
  transition: all 0.3s ease;
  box-shadow: 0 4px 20px var(--shadow);
}

.form-control:hover,
.form-select:hover,
textarea.form-control:hover {
  background: var(--bg-secondary);
  border-color: var(--glass-border);
  color: var(--text-primary) !important;
}

.form-control:focus,
.form-select:focus,
textarea.form-control:focus {
  background: var(--bg-secondary);
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(255, 107, 107, 0.1);
  outline: none;
  color: var(--text-primary) !important;
}

.form-control::placeholder {
  color: var(--text-muted);
}

.form-label {
  color: var(--text-secondary);
  font-weight: 500;
  margin-bottom: 0.75rem;
}

/* ========== CARDS ========== */
.card {
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  overflow: hidden;
  transition: all 0.3s ease;
  box-shadow: 0 8px 32px var(--shadow);
  position: relative;
  height: 100%;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--accent), #ff8e53);
  transform: scaleX(0);
  transition: transform 0.3s ease;
}

.card:hover {
  transform: translateY(-10px) scale(1.02);
  box-shadow: 0 20px 40px var(--shadow), 0 0 20px rgba(255, 107, 107, 0.4);
  filter: brightness(1.05);
}

.card:hover::before {
  transform: scaleX(1);
}

.card img {
  transition: transform 0.3s ease;
}

.card:hover img {
  transform: scale(1.05);
}

.card-title {
  font-weight: 600;
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
  transition: color 0.3s ease;
}

.card:hover .card-title {
  color: var(--accent);
}

.card-text {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  font-size: 0.9rem;
  flex-grow: 1;
}

.card-body {
  padding: 2rem;
  display: flex;
  flex-direction: column;
  min-height: 250px;
}

/* Card entrance animation */
.card {
  animation: cardEntrance 0.6s ease-out;
  animation-fill-mode: both;
}

.card:nth-child(1) { animation-delay: 0.1s; }
.card:nth-child(2) { animation-delay: 0.2s; }
.card:nth-child(3) { animation-delay: 0.3s; }
.card:nth-child(4) { animation-delay: 0.4s; }
.card:nth-child(5) { animation-delay: 0.5s; }
.card:nth-child(6) { animation-delay: 0.6s; }
.card:nth-child(7) { animation-delay: 0.7s; }
.card:nth-child(8) { animation-delay: 0.8s; }

@keyframes cardEntrance {
  from {
    opacity: 0;
    transform: translateY(30px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* ========== BUTTONS ========== */
.btn {
  padding: 0.75rem 1.5rem;
  border-radius: 50px;
  font-weight: 500;
  text-decoration: none;
  transition: all 0.3s ease;
  border: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-hover));
  color: white;
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--accent-hover), #ff3838);
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(255, 107, 107, 0.3);
}

.btn-danger {
  background: linear-gradient(135deg, var(--accent), var(--accent-hover));
  color: white;
}

.btn-danger:hover {
  background: linear-gradient(135deg, var(--accent-hover), #ff3838);
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(255, 107, 107, 0.3);
}

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

.btn-secondary:hover {
  background: var(--border);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--accent);
  color: var(--accent);
}

.btn-outline:hover {
  background: var(--accent);
  color: white;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ========== HEADINGS ========== */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-primary);
  font-weight: 600;
  margin-bottom: 1.5rem;
  line-height: 1.4;
}

h1 {
  font-size: 2.5rem;
}

h2 {
  font-size: 2rem;
}

h3 {
  font-size: 1.5rem;
}

h4 {
  font-size: 1.25rem;
}

@media (max-width: 768px) {
  h1 { font-size: 2rem; }
  h2 { font-size: 1.5rem; }
  h3 { font-size: 1.25rem; }
  h4 { font-size: 1.1rem; }
}

/* ========== TABLES ========== */
.table {
  color: var(--text-primary);
  border-color: var(--border);
  background: var(--bg-secondary) !important;
}

.table-dark {
  background: var(--bg-secondary) !important;
}

.table thead th {
  border-color: var(--border);
  background: var(--bg-tertiary) !important;
  color: var(--text-primary);
}

.table tbody td {
  border-color: var(--border);
  background: var(--bg-secondary) !important;
  color: var(--text-primary);
}

.table tbody tr:hover {
  background: var(--bg-tertiary) !important;
}

/* ========== FOOTER ========== */
.footer {
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  border-top: 1px solid var(--glass-border);
  padding: 3rem 0 2rem;
  position: relative;
  margin-top: 4rem;
}

.footer p {
  margin-bottom: 1rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 2rem;
  flex-wrap: wrap;
  margin-top: 1.5rem;
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 400;
  transition: color 0.3s ease;
}

.footer-links a:hover {
  color: var(--accent);
}

/* ========== UTILITIES ========== */
.text-center {
  text-align: center;
}

.text-muted {
  color: var(--text-muted);
}

.text-secondary {
  color: var(--text-secondary);
}

.loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  text-align: center;
  color: var(--text-secondary);
  font-size: 1.1rem;
  margin-top: 2rem;
}

.no-results {
  text-align: center;
  color: var(--text-secondary);
  font-size: 1.1rem;
  position: relative;
  margin-top: 2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 4px solid var(--glass-border);
  border-top: 4px solid var(--accent);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

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

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

.alert {
  padding: 1rem 1.5rem;
  border-radius: 12px;
  border-left: 4px solid var(--accent);
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
}

.alert-success {
  border-left-color: #4ade80;
}

.alert-error {
  border-left-color: var(--accent);
}

.alert-info {
  border-left-color: #3b82f6;
}

/* ========== MODALS ========== */
.modal-content {
  background: var(--bg-secondary);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  color: var(--text-primary);
}

.modal-header {
  border-bottom: 1px solid var(--glass-border);
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.modal-body {
  padding: 2rem;
  background: var(--bg-secondary);
  color: var(--text-primary);
}

.modal-footer {
  border-top: 1px solid var(--glass-border);
  background: var(--bg-tertiary);
}

.btn-close {
  filter: brightness(1.5);
}

.btn-close:hover {
  filter: brightness(2);
}

/* ========== RESPONSIVE ========== */
@media (max-width: 768px) {
  body {
    padding-top: 4rem;
  }

  .container {
    padding: 1rem;
  }

  .navbar-brand {
    font-size: 1.25rem;
  }

  .card-body {
    padding: 1.5rem;
  }

  .footer {
    padding: 2rem 0 1rem;
  }

  .footer-links {
    gap: 1rem;
  }

  .btn {
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
  }
}

@media (max-width: 480px) {
  .form-control,
  .form-select,
  textarea.form-control {
    padding: 0.75rem 1rem;
    font-size: 0.9rem;
  }

  .btn {
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
  }

  h1 { font-size: 1.75rem; }
  h2 { font-size: 1.25rem; }
  h3 { font-size: 1.1rem; }
}

/* ========== SCROLLBAR ========== */
::-webkit-scrollbar {
  width: 10px;
}

::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
  background: var(--accent);
  border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--accent-hover);
}