@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,300;0,400;0,500;0,600;0,700;1,300;1,400;1,500;1,600;1,700&family=Inter:wght@300;400;500;600;700&display=swap');

/* CSS VARIABLES - DESIGN SYSTEM */
:root {
  /* Dark Mode (Default) */
  --bg-primary: oklch(0.145 0 0); /* pitch-black */
  --bg-secondary: oklch(0.16 0 0);
  --bg-tertiary: oklch(0.18 0 0);
  
  --card-bg: oklch(0.205 0 0 / 0.85); /* muted charcoal */
  --card-border: oklch(0.3 0 0 / 0.7); /* delicate gray-white border with opacity */
  --card-glow: transparent;

  --text-primary: oklch(0.985 0 0); /* crisp off-white */
  --text-secondary: oklch(0.75 0 0);
  --text-muted: oklch(0.55 0 0);

  /* Accent Color (Warm rust/terracotta) */
  --accent-primary: oklch(0.62 0.14 42);
  
  /* Semantic mappings for dynamic states */
  --accent-blue: oklch(0.62 0.14 42);
  --accent-purple: oklch(0.62 0.14 42);
  --accent-indigo: oklch(0.62 0.14 42);
  
  /* Status indicators - styled to match architectural palette */
  --accent-emerald: oklch(0.72 0.11 140); /* sage */
  --accent-rose: oklch(0.62 0.15 15); /* muted terracotta red */
  --accent-amber: oklch(0.75 0.12 75); /* ochre */

  /* Button styles */
  --btn-primary-bg: oklch(0.985 0 0); /* off-white block */
  --btn-primary-text: oklch(0.145 0 0); /* black text */
  --btn-secondary-bg: transparent;
  --btn-secondary-border: oklch(0.4 0 0 / 0.7);
  --btn-secondary-text: oklch(0.985 0 0);

  /* Gradients deactivated for flat design */
  --gradient-primary: var(--accent-primary);
  --gradient-blue: var(--accent-primary);
  --gradient-dark: var(--bg-primary);
  --gradient-glow: transparent;

  --font-body: 'Inter', 'Arial', sans-serif;
  --font-heading: 'Cormorant Garamond', 'Garamond', 'Georgia', serif;

  --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.4s cubic-bezier(0.4, 0, 0.2, 1);

  --shadow-sm: none;
  --shadow-md: none;
  --shadow-lg: none;
  --shadow-glass: none;

  --backdrop-blur: blur(20px);
}

/* LIGHT THEME VARIABLES */
body.light-theme {
  --bg-primary: oklch(0.975 0.008 95); /* warm cream/alabaster */
  --bg-secondary: oklch(0.985 0.006 95);
  --bg-tertiary: oklch(0.94 0.01 95);
  
  --card-bg: oklch(0.99 0.005 95 / 0.85); /* delicate warm white card */
  --card-border: oklch(0.19 0.015 70 / 0.15); /* delicate warm charcoal border */
  --card-glow: transparent;

  --text-primary: oklch(0.19 0.015 70); /* deep warm charcoal */
  --text-secondary: oklch(0.35 0.012 70);
  --text-muted: oklch(0.55 0.01 70);

  --accent-emerald: oklch(0.45 0.1 140);
  --accent-rose: oklch(0.5 0.12 15);
  --accent-amber: oklch(0.55 0.1 75);

  --btn-primary-bg: oklch(0.19 0.015 70); /* charcoal button */
  --btn-primary-text: oklch(0.975 0.008 95); /* cream text */
  --btn-secondary-bg: transparent;
  --btn-secondary-border: oklch(0.19 0.015 70 / 0.3);
  --btn-secondary-text: oklch(0.19 0.015 70);
}

/* RESET & BASE STYLES */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.62;
  min-height: 100vh;
  overflow-x: hidden;
  background-image: none;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 500; /* Editorial weight */
  letter-spacing: -0.01em;
  line-height: 1.2;
}

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

/* SCROLLBAR */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: var(--card-border);
  border-radius: 0;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--accent-primary);
}

/* LAYOUT UTILITIES */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 3rem;
}

/* NAVBAR */
.navbar {
  backdrop-filter: var(--backdrop-blur);
  -webkit-backdrop-filter: var(--backdrop-blur);
  background-color: var(--bg-primary);
  border-bottom: 1px solid var(--card-border);
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 1.75rem 0;
}

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

.logo {
  font-family: var(--font-heading);
  font-size: 1.85rem;
  font-weight: 500;
  font-style: italic;
  text-transform: lowercase;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.15rem;
}

.logo span {
  color: var(--accent-primary);
  font-style: normal;
  font-weight: 400;
  text-transform: uppercase;
  font-size: 0.95rem;
  letter-spacing: 0.15em;
  margin-left: 0.25rem;
  display: inline-block;
  vertical-align: middle;
}

.nav-links {
  display: flex;
  gap: 2.5rem;
  align-items: center;
  list-style: none;
}

.nav-link {
  color: var(--text-secondary);
  font-weight: 400;
  font-size: 0.95rem;
  letter-spacing: 0.02em;
}

.nav-link:hover, .nav-link.active {
  color: var(--text-primary);
  text-decoration: underline;
  text-underline-offset: 4px;
  text-shadow: none;
}

/* BUTTONS */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1.75rem;
  border-radius: 0; /* Strict square borders */
  font-weight: 500;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  cursor: pointer;
  transition: transform 0.12s ease-in-out, background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
  border: 1px solid transparent;
  gap: 0.5rem;
}

.btn:hover {
  transform: translateY(-0.5px);
}

.btn:active {
  transform: scale(0.99);
}

.btn-primary {
  background-color: var(--btn-primary-bg);
  color: var(--btn-primary-text);
  border: 1px solid var(--btn-primary-bg);
  box-shadow: none;
}

.btn-primary:hover {
  background-color: var(--accent-primary);
  border-color: var(--accent-primary);
  color: white;
  box-shadow: none;
}

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

.btn-secondary:hover {
  background-color: var(--text-primary);
  color: var(--bg-primary);
  border-color: var(--text-primary);
  transform: translateY(-0.5px);
}

.btn-danger {
  background-color: var(--accent-rose);
  color: white;
  border: 1px solid var(--accent-rose);
}
.btn-danger:hover {
  background-color: oklch(0.52 0.12 15);
  border-color: oklch(0.52 0.12 15);
  transform: translateY(-0.5px);
}

.btn-sm {
  padding: 0.55rem 1.15rem;
  font-size: 0.8rem;
}

/* GLASS CARD (Compartmentalized grid cells) */
.glass-card {
  background-color: var(--card-bg);
  border: 1px solid var(--card-border);
  backdrop-filter: var(--backdrop-blur);
  -webkit-backdrop-filter: var(--backdrop-blur);
  border-radius: 0; /* Strict square corners */
  padding: 3rem;
  box-shadow: none;
  transition: border-color var(--transition-normal);
}

.glass-card:hover {
  border-color: var(--accent-primary);
  box-shadow: none;
}

/* HERO SECTION */
.hero {
  padding: 10rem 0 8rem 0; /* Massive whitespace */
  text-align: center;
  position: relative;
}

.hero-glow {
  display: none; /* No neon gradient glows */
}

.hero h1 {
  font-size: 4.5rem;
  margin-bottom: 2rem;
  font-weight: 300; /* Elegant light serif */
  color: var(--text-primary);
  background: none;
  -webkit-text-fill-color: initial;
  -webkit-background-clip: initial;
}

.hero p {
  font-size: 1.35rem;
  color: var(--text-secondary);
  max-width: 750px;
  margin: 0 auto 3rem auto;
  font-weight: 300;
  line-height: 1.7;
}

.hero-ctas {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
}

/* FEATURES SECTION */
.features {
  padding: 6rem 0;
}

.section-title {
  text-align: center;
  font-size: 2.75rem;
  font-weight: 400;
  margin-bottom: 5rem;
  color: var(--text-primary);
}

.section-title span {
  color: var(--accent-primary);
  background: none;
  -webkit-text-fill-color: initial;
  -webkit-background-clip: initial;
  font-style: italic;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2.5rem;
}

.feature-card {
  text-align: left;
}

.feature-icon {
  width: 54px;
  height: 54px;
  border-radius: 0; /* Square edges */
  background: transparent;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-primary);
  font-size: 1.85rem;
  margin-bottom: 2rem;
  border: 1px solid var(--card-border);
}

.feature-card h3 {
  font-size: 1.5rem;
  font-weight: 400;
  margin-bottom: 1rem;
}

.feature-card p {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.65;
  font-weight: 300;
}

/* FORM STYLING */
.auth-wrapper {
  min-height: calc(100vh - 150px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 4rem 0;
}

.auth-card {
  width: 100%;
  max-width: 480px;
}

.auth-header {
  text-align: center;
  margin-bottom: 2.5rem;
}

.auth-header h2 {
  font-size: 2.25rem;
  font-weight: 400;
  margin-bottom: 0.75rem;
}

.auth-header p {
  color: var(--text-secondary);
  font-size: 1rem;
  font-weight: 300;
}

.form-group {
  margin-bottom: 2rem;
}

.form-label {
  display: block;
  margin-bottom: 0.75rem;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.form-input {
  width: 100%;
  padding: 0.85rem 1.25rem;
  background-color: var(--bg-primary);
  border: 1px solid var(--card-border);
  border-radius: 0; /* Sharp edges */
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 1rem;
  transition: var(--transition-fast);
}

.form-input:focus {
  outline: none;
  border-color: var(--accent-primary);
  background-color: var(--bg-primary);
  box-shadow: none;
}

.auth-footer {
  text-align: center;
  margin-top: 2rem;
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.auth-footer a {
  color: var(--accent-primary);
  font-weight: 600;
}

.auth-footer a:hover {
  text-decoration: underline;
}

/* ALERTS & TOASTS */
.alert {
  padding: 1rem 1.25rem;
  border-radius: 0; /* Square alert */
  font-size: 0.95rem;
  margin-bottom: 2rem;
  display: none;
  animation: slideUp var(--transition-fast);
}

.alert-danger {
  background: var(--bg-primary);
  border: 1px solid var(--accent-rose);
  color: var(--accent-rose);
}

.alert-success {
  background: var(--bg-primary);
  border: 1px solid var(--accent-emerald);
  color: var(--accent-emerald);
}

/* ANIMATIONS */
@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  animation: slideUp var(--transition-normal);
}

/* RESPONSIVE DESIGN */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 3rem;
  }
  .container {
    padding: 0 1.75rem;
  }
  .nav-links {
    gap: 1.5rem;
  }
}

/* GLOBAL THEME TRANSITIONS */
body, .glass-card, .navbar, .form-input, .activity-table th, .activity-table td, h1, h2, h3, h4, h5, h6, p, li, span, a, button {
  transition: background-color var(--transition-normal), 
              border-color var(--transition-normal), 
              color var(--transition-normal), 
              box-shadow var(--transition-normal),
              backdrop-filter var(--transition-normal);
}

/* Light Theme overrides for card hover & background */
body.light-theme .glass-card:hover {
  border-color: var(--accent-primary);
  box-shadow: none;
}

body.light-theme .form-input {
  background-color: var(--bg-primary);
}

body.light-theme .form-input:focus {
  border-color: var(--accent-primary);
}

body.light-theme .navbar {
  background-color: oklch(0.975 0.008 95 / 0.85);
}

/* TYPOGRAPHY INLINE HIGHLIGHTS */
em, .italic-emphasis {
  font-family: var(--font-heading) !important;
  font-style: italic !important;
  font-weight: 400 !important;
  text-transform: lowercase !important;
  color: var(--accent-primary) !important;
}

.italic {
  font-family: var(--font-heading);
  font-style: italic;
}

.text-accent {
  color: var(--accent-primary) !important;
}

.font-normal {
  font-weight: 400 !important;
}

/* SQUARE RADII OVERRIDES FOR LOCAL STYLES */
.badge, .tier-badge, .rank-badge, .avatar-circle, .progress-bar-container, .progress-bar-fill, .selected-file-box, .upload-zone, .tab-btn, .form-select, .answer-textarea, .podium-card {
  border-radius: 0 !important;
}

/* Delicate Borders for badges rather than glowing fills */
.badge-success, .tier-excellent {
  background: transparent !important;
  color: var(--accent-emerald) !important;
  border: 1px solid var(--accent-emerald) !important;
}

.badge-progress, .tier-good {
  background: transparent !important;
  color: var(--accent-amber) !important;
  border: 1px solid var(--accent-amber) !important;
}

.tier-poor {
  background: transparent !important;
  color: var(--accent-rose) !important;
  border: 1px solid var(--accent-rose) !important;
}

/* Whitespace utility classes */
.py-12 {
  padding-top: 3rem !important;
  padding-bottom: 3rem !important;
}

.py-24 {
  padding-top: 6rem !important;
  padding-bottom: 6rem !important;
}

.my-12 {
  margin-top: 3rem !important;
  margin-bottom: 3rem !important;
}

.my-24 {
  margin-top: 6rem !important;
  margin-bottom: 6rem !important;
}