:root {
  --bg-deep-black: #000000;
  --bg-card: #0a0a0a;
  --primary-purple: #3b003b;
  --primary-purple-hover: #4d004d;
  --accent-yellow: #F6E05E;
  --accent-gold: #D4AF37;
  --text-main: #ffffff;
  --text-muted: #cccccc;
  --border-color: #1a1a1a;
}

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

body {
  font-family: 'Inter', 'Segoe UI', sans-serif;
  background-color: var(--bg-deep-black);
  color: var(--text-main);
  line-height: 1.6;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
  color: var(--accent-yellow);
  font-weight: 700;
  margin-bottom: 1rem;
}

a {
  color: var(--accent-yellow);
  text-decoration: none;
  transition: color 0.3s ease;
}

a:hover {
  color: var(--text-main);
}

/* Layout Utilities */
.container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
}

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

.mt-2 {
  margin-top: 2rem;
}

.mb-2 {
  margin-bottom: 2rem;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border-radius: 4px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  border: none;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.btn-primary {
  background-color: var(--accent-yellow);
  color: var(--bg-deep-black);
}

.btn-primary:hover {
  background-color: #e6c200;
  transform: translateY(-2px);
}

.btn-secondary {
  background-color: var(--primary-purple);
  color: var(--text-main);
}

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

.btn-block {
  display: block;
  width: 100%;
}

/* Header & Nav */
header {
  background-color: rgba(5, 5, 5, 0.95);
  border-bottom: 1px solid var(--border-color);
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 1000;
}

header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.5rem;
  font-weight: bold;
  color: var(--text-main);
  letter-spacing: 2px;
}

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

nav ul {
  list-style: none;
  display: flex;
  gap: 1.5rem;
  align-items: center;
}

nav a {
  color: var(--text-main);
  font-weight: 500;
}

nav a:hover,
nav a.active {
  color: var(--accent-yellow);
}

/* Desktop Nav specific links */
.desktop-link {
  color: var(--text-main);
  font-weight: 500;
}

/* Mobile Menu Button */
.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 6px;
  cursor: pointer;
  z-index: 1001;
}

.mobile-menu-btn span {
  width: 30px;
  height: 3px;
  background-color: var(--text-main);
  transition: 0.3s;
}

/* Mobile Menu Overlay */
.mobile-menu {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  background-color: var(--bg-deep-black);
  z-index: 2000;
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform 0.3s ease-in-out;
  overflow-y: auto;
}

.mobile-menu.active {
  transform: translateX(0);
}

.mobile-menu-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  border-bottom: 1px solid var(--border-color);
}

.close-btn {
  color: var(--text-main);
  font-size: 2rem;
  cursor: pointer;
}

.mobile-nav ul {
  flex-direction: column;
  gap: 0;
  align-items: stretch;
}

.mobile-nav li {
  padding: 1.5rem 2rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.mobile-nav li.dark-bg {
  background-color: #0b0f19;
  /* Slight dark blue/black tint from image */
}

.mobile-nav li.purple-bg {
  background-color: var(--primary-purple);
}

.mobile-nav a {
  font-size: 1.1rem;
  display: block;
}

/* Media Queries */
@media screen and (max-width: 768px) {
  .desktop-nav {
    display: none;
  }

  .mobile-menu-btn {
    display: flex;
  }
}

@media screen and (min-width: 769px) {
  .mobile-menu {
    display: none !important;
  }
}

/* Forms */
.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--text-muted);
}

.form-control {
  width: 100%;
  padding: 0.75rem;
  background-color: var(--bg-deep-black);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  border-radius: 4px;
}

.form-control:focus {
  outline: none;
  border-color: var(--primary-purple);
}

/* Cards */
.card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card.hover-animate:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.5);
}

/* Animations */
.fade-in-section {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.8s ease-out, transform 0.8s ease-out;
  will-change: opacity, visibility;
}

.fade-in-section.is-visible {
  opacity: 1;
  transform: none;
}

/* Auth Pages */
.auth-wrapper {
  min-height: calc(100vh - 80px);
  /* rough header offset */
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}

.auth-card {
  width: 100%;
  max-width: 400px;
}

/* Alerts */
.alert {
  padding: 1rem;
  margin-bottom: 1rem;
  border-radius: 4px;
}

.alert-error {
  background-color: rgba(255, 0, 0, 0.1);
  border: 1px solid red;
  color: #ffb3b3;
}

.alert-success {
  background-color: rgba(0, 255, 0, 0.1);
  border: 1px solid green;
  color: #b3ffb3;
}

/* Dashboard Layout */
.dashboard-layout {
  display: flex;
  min-height: calc(100vh - 80px);
  /* Adjust based on header height */
  transition: all 0.3s ease;
}

/* Sidebar */
.sidebar {
  width: 250px;
  background-color: var(--bg-card);
  border-right: 1px solid var(--border-color);
  padding: 1.5rem 1rem;
  display: flex;
  flex-direction: column;
  transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  z-index: 100;
  overflow: hidden;
  white-space: nowrap;
}

.sidebar.collapsed {
  width: 70px;
  padding: 1.5rem 0.5rem;
}

/* Sidebar Toggle Header */
.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 2rem;
  padding: 0 0.5rem;
}

.sidebar.collapsed .sidebar-header {
  justify-content: center;
}

.sidebar-title {
  color: var(--text-muted);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  font-weight: 700;
  transition: opacity 0.2s ease;
}

.sidebar.collapsed .sidebar-title {
  opacity: 0;
  display: none;
}

.sidebar-toggle {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  transition: all 0.3s ease;
}

.sidebar-toggle:hover {
  background-color: rgba(255, 255, 255, 0.1);
  color: var(--accent-yellow);
}

.sidebar.collapsed .sidebar-toggle {
  transform: rotate(180deg);
}

.sidebar .nav-menu {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  overflow-y: auto;
  overflow-x: hidden;
}

/* Scrollbar styling for sidebar menu */
.sidebar .nav-menu::-webkit-scrollbar {
  width: 4px;
}

.sidebar .nav-menu::-webkit-scrollbar-track {
  background: transparent;
}

.sidebar .nav-menu::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 4px;
}

.sidebar .nav-link {
  display: flex;
  align-items: center;
  padding: 0.85rem 1rem;
  color: var(--text-muted);
  border-radius: 8px;
  transition: all 0.2s ease-in-out;
  font-weight: 500;
  font-size: 1rem;
  position: relative;
}

.sidebar.collapsed .nav-link {
  padding: 0.85rem;
  justify-content: center;
}

.sidebar .nav-link .nav-text {
  transition: opacity 0.2s ease-in-out;
  margin-left: 12px;
}

.sidebar.collapsed .nav-link .nav-text {
  opacity: 0;
  width: 0;
  margin-left: 0;
  overflow: hidden;
}

/* Tooltip for collapsed sidebar */
.sidebar.collapsed .nav-link:hover::after,
.sidebar.collapsed .logout-btn a:hover::after {
  content: attr(data-title);
  position: absolute;
  left: 100%;
  top: 50%;
  transform: translateY(-50%);
  margin-left: 10px;
  background-color: rgba(0, 0, 0, 0.9);
  color: var(--text-main);
  padding: 0.4rem 0.8rem;
  border-radius: 4px;
  font-size: 0.85rem;
  white-space: nowrap;
  pointer-events: none;
  z-index: 1000;
  border: 1px solid var(--primary-purple);
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}

.sidebar .nav-link i {
  font-size: 1.2rem;
  width: 20px;
  text-align: center;
  opacity: 0.8;
  transition: opacity 0.2s, color 0.2s;
  flex-shrink: 0;
}

/* Keep SVG support just in case */
.sidebar .nav-link svg {
  margin-right: 0;
  /* Handled by .nav-text margin now */
  width: 20px;
  text-align: center;
  opacity: 0.8;
  transition: opacity 0.2s ease-in-out;
  flex-shrink: 0;
}

.sidebar .nav-link:hover {
  background-color: rgba(59, 0, 59, 0.4);
  color: var(--text-main);
  transform: translateX(4px);
}

.sidebar.collapsed .nav-link:hover {
  transform: translateX(0);
  /* Don't slide horizontally when collapsed */
  background-color: rgba(59, 0, 59, 0.6);
}

.sidebar .nav-link:hover i,
.sidebar .nav-link:hover svg {
  opacity: 1;
  color: var(--accent-yellow);
}

.sidebar .nav-link.active {
  background-color: var(--primary-purple);
  color: var(--accent-yellow);
  box-shadow: 0 4px 12px rgba(59, 0, 59, 0.5);
  font-weight: 600;
}

.sidebar .nav-link.active i,
.sidebar .nav-link.active svg {
  opacity: 1;
}

.sidebar .logout-btn {
  margin-top: auto;
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
  padding-bottom: 0.5rem;
}

.sidebar .logout-btn a {
  color: #ff6666;
  opacity: 0.8;
  display: flex;
  align-items: center;
  padding: 0.85rem 1rem;
  border-radius: 8px;
  transition: all 0.2s ease;
  font-weight: 500;
  text-decoration: none;
  position: relative;
}

.sidebar.collapsed .logout-btn a {
  padding: 0.85rem;
  justify-content: center;
}

.sidebar .logout-btn .nav-text {
  margin-left: 12px;
  transition: opacity 0.2s ease;
}

.sidebar.collapsed .logout-btn .nav-text {
  opacity: 0;
  width: 0;
  margin-left: 0;
  overflow: hidden;
}

.sidebar .logout-btn i {
  font-size: 1.2rem;
  width: 20px;
  text-align: center;
  flex-shrink: 0;
}

.sidebar .logout-btn a:hover {
  background-color: rgba(255, 102, 102, 0.1);
  color: #ff4d4d;
  opacity: 1;
  transform: translateX(4px);
}

.sidebar.collapsed .logout-btn a:hover {
  transform: translateX(0);
}

/* Dashboard Content Area */
.dashboard-content {
  flex-grow: 1;
  padding: 2rem;
  overflow-y: auto;
  width: calc(100% - 250px);
  transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.dashboard-layout:has(.sidebar.collapsed) .dashboard-content {
  width: calc(100% - 70px);
}

/* Responsive Dashboard Layout */
@media screen and (max-width: 768px) {
  .dashboard-layout {
    flex-direction: column;
  }

  .sidebar {
    position: fixed;
    top: 0;
    left: -280px;
    /* Hidden by default */
    width: 280px !important;
    height: 100vh;
    z-index: 2000;
    box-shadow: 5px 0 25px rgba(0, 0, 0, 0.5);
    transition: left 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border-right: 1px solid var(--border-color);
    padding: 1.5rem 1rem;
    overflow-y: auto;
  }

  .sidebar.mobile-open {
    left: 0;
  }

  .sidebar-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    z-index: 1999;
    display: none;
    opacity: 0;
    transition: opacity 0.3s ease;
  }

  .sidebar-overlay.active {
    display: block;
    opacity: 1;
  }

  /* Floating toggle button for mobile dashboard */
  .mobile-dashboard-toggle {
    display: flex;
    position: fixed;
    bottom: 5rem;
    right: 1.5rem;
    width: 56px;
    height: 56px;
    background: var(--primary-purple);
    color: var(--accent-yellow);
    border-radius: 50%;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    box-shadow: 0 4px 15px rgba(59, 0, 59, 0.5);
    z-index: 1500;
    cursor: pointer;
    border: 1px solid rgba(255, 215, 0, 0.2);
    transition: all 0.3s ease;
  }

  .mobile-dashboard-toggle:active {
    transform: scale(0.9);
  }

  .sidebar-header {
    display: flex;
    /* Show toggle button on mobile header now */
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1rem;
    margin-bottom: 1.5rem;
  }

  .sidebar .logout-btn {
    margin-top: 2rem;
  }

  .dashboard-content {
    width: 100% !important;
    padding: 1.5rem;
  }

  .sidebar.collapsed .nav-text,
  .sidebar .nav-text {
    opacity: 1 !important;
    width: auto !important;
    margin-left: 12px !important;
    display: inline-block !important;
  }

  .sidebar.collapsed .nav-link,
  .sidebar .nav-link {
    justify-content: flex-start !important;
    padding: 1rem !important;
  }
}

/* ─── Performance: Card Entrance Animation ─────────────────────────────── */
/* Driven by CSS custom property --card-delay set from JS, no setTimeout   */
.card-animate {
  opacity: 0;
  transform: translateY(18px);
  animation: cardEnter 0.45s ease forwards;
  animation-delay: var(--card-delay, 0s);
  will-change: opacity, transform;
}

@keyframes cardEnter {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ─── Scroll Fade-in Sections ──────────────────────────────────────────── */
.fade-in-section {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.55s ease, transform 0.55s ease;
  will-change: opacity, transform;
}

.fade-in-section.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ─── Image Optimisation Defaults ──────────────────────────────────────── */
img {
  max-width: 100%;
  height: auto;
  display: block;
  /* content-visibility allows browser to skip off-screen image decode     */
  content-visibility: auto;
}

/* Reserve paint for images with known dimensions to prevent CLS          */
img[width][height] {
  aspect-ratio: attr(width) / attr(height);
}

/* ─── Performance: GPU-composited transitions where possible ───────────── */
.btn {
  will-change: transform;
}

.grid-card {
  will-change: transform, box-shadow;
}