/* Main Landing Page Styles */
/* Extends global.css */

/* Phase 1: Typography & Fonts */
@import url('https://fonts.googleapis.com/css2?family=Crimson+Pro:wght@400;600&family=Work+Sans:wght@400;500&display=swap');

:root {
  /* Typography */
  --font-serif: 'Crimson Pro', Georgia, serif;
  --font-sans: 'Work Sans', -apple-system, sans-serif;

  /* Dark Mode Color System */
  --bg-base: #1a1a1a;
  --bg-elevated: #242424;
  --text-primary: #e8e8e8;
  --text-secondary: #a0a0a0;
  --border-subtle: #2f2f2f;

  /* Section Colors - Muted, adjusted for dark mode */
  --academic-color: #9b8bb8;
  --jobb-color: #7a9bb8;
  --tools-color: #7fa490;
  --creative-color: #d4a5a3;
  --lab-color: #c9a08b;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-base);
  min-height: 100vh;
  color: var(--text-primary);
}

/* Phase 3: Header Redesign - Refined, Solid */
header {
  background: var(--bg-base);
  padding: 2rem 0;
  border-bottom: 1px solid var(--border-subtle);
}

.header-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

header h1 {
  font-family: var(--font-serif);
  color: var(--text-primary);
  font-size: 2.5rem;
  font-weight: 600;
}

header p {
  font-family: var(--font-sans);
  color: var(--text-secondary);
  font-size: 1rem;
  margin-top: 0.25rem;
  line-height: 1.6;
}

/* Phase 5: Spacing & Layout */
main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 4rem 2rem;
}

/* Portfolio Intro - Replaces Welcome Section */
.portfolio-intro {
  font-family: var(--font-sans);
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 2.5rem;
  line-height: 1.8;
}

.apps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 2rem;
}

/* Card Container for Flip Interaction */
.app-card-container {
  perspective: 1000px;
  position: relative;
}

.app-card-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transition: transform 0.6s ease;
  transform-style: preserve-3d;
}

.app-card-container.flipped .app-card-inner {
  transform: rotateY(180deg);
}

/* Phase 4: Card Redesign - Subtle, Sophisticated (Dark Mode) */
.app-card {
  background: color-mix(in srgb, var(--accent-color) 8%, var(--bg-elevated));
  border: 1px solid color-mix(in srgb, var(--accent-color) 20%, transparent);
  border-radius: 12px;
  padding: 2.5rem;
  text-decoration: none;
  color: inherit;
  transition: all 0.3s ease-out;
  display: flex;
  flex-direction: column;
  position: relative;
  backface-visibility: hidden;
}

/* Card Front and Back faces */
.app-card-container .app-card-front,
.app-card-container .app-card-back {
  backface-visibility: hidden;
  cursor: pointer;
}

.app-card-container .app-card-front {
  position: relative;
}

.app-card-container .app-card-back {
  position: absolute !important;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  transform: rotateY(180deg);
  overflow-y: auto;
  max-height: 100%;
  padding: 1.5rem !important;
  cursor: pointer;
}

.app-card-back * {
  cursor: pointer;
}

.app-card-back a {
  cursor: pointer !important;
}

/* Phase 6: Refined Hover Interaction (Dark Mode) */
.app-card:hover:not(.app-card-front):not(.app-card-back) {
  transform: scale(1.01);
  border-color: color-mix(in srgb, var(--accent-color) 35%, transparent);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
}

/* Hover for flip cards */
.app-card-front:hover,
.app-card-back:hover {
  border-color: color-mix(in srgb, var(--accent-color) 35%, transparent);
}

.app-icon {
  width: 48px;
  height: 48px;
  background: color-mix(in srgb, var(--accent-color) 18%, var(--bg-base));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

.app-card h3 {
  font-family: var(--font-sans);
  font-size: 1.25rem;
  font-weight: 500;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.app-card p {
  font-family: var(--font-sans);
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.8;
  flex-grow: 1;
}

/* Phase 8: Status Indicators - Refined (Dark Mode) */
.app-status {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid color-mix(in srgb, var(--accent-color) 15%, transparent);
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-secondary);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-color);
}

.status-dot.inactive {
  background: #5a5a5a;
}

.app-card.coming-soon {
  opacity: 0.6;
  pointer-events: none;
}

.app-card.coming-soon .status-dot {
  background: #5a5a5a;
}

/* Section-specific colors - Cohesive, Desaturated Palette */
.app-card[data-app="academic"] {
  --accent-color: var(--academic-color);
}

.app-card[data-app="jobb"] {
  --accent-color: var(--jobb-color);
}

.app-card[data-app="tools"] {
  --accent-color: var(--tools-color);
}

.app-card[data-app="creative"] {
  --accent-color: var(--creative-color);
}

.app-card[data-app="lab"] {
  --accent-color: var(--lab-color);
}

/* Subproject Menu (Card Back) */
.app-card-back h3 {
  font-size: 1.1rem;
  margin-bottom: 1rem;
}

.subproject-menu {
  list-style: none;
  padding: 0;
  margin: 0 0 1rem 0;
}

.subproject-menu li {
  margin-bottom: 0.75rem;
}

.subproject-menu a {
  display: block;
  padding: 0.75rem;
  background: color-mix(in srgb, var(--accent-color) 5%, var(--bg-base));
  border: 1px solid color-mix(in srgb, var(--accent-color) 15%, transparent);
  border-radius: 8px;
  text-decoration: none;
  color: inherit;
  transition: all 0.2s ease;
}

.subproject-menu a:hover {
  background: color-mix(in srgb, var(--accent-color) 10%, var(--bg-base));
  border-color: color-mix(in srgb, var(--accent-color) 30%, transparent);
  transform: translateX(4px);
}

.subproject-menu strong {
  display: block;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 0.2rem;
}

.subproject-menu span {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.4;
}

/* Flip Back Button */
.flip-back {
  background: transparent;
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  padding: 0.6rem 1rem;
  border-radius: 8px;
  cursor: pointer;
  font-family: var(--font-sans);
  font-size: 0.85rem;
  transition: all 0.2s ease;
  width: 100%;
  margin-top: 0.5rem;
}

.flip-back:hover {
  background: var(--bg-base);
  border-color: color-mix(in srgb, var(--accent-color) 25%, transparent);
  color: var(--text-primary);
}

/* Subcategory Menu (nested drill-down) */
.subcategory-menu {
  padding: 0;
}

.subcategory-menu h3 {
  font-size: 1.1rem;
  margin-bottom: 1rem;
}

.subcategory-menu ul {
  list-style: none;
  padding: 0;
  margin: 0 0 1rem 0;
}

.subcategory-menu li {
  margin-bottom: 0.75rem;
}

.subcategory-menu a {
  display: block;
  padding: 0.75rem;
  background: color-mix(in srgb, var(--accent-color) 5%, var(--bg-base));
  border: 1px solid color-mix(in srgb, var(--accent-color) 15%, transparent);
  border-radius: 8px;
  text-decoration: none;
  color: inherit;
  transition: all 0.2s ease;
}

.subcategory-menu a:hover {
  background: color-mix(in srgb, var(--accent-color) 10%, var(--bg-base));
  border-color: color-mix(in srgb, var(--accent-color) 30%, transparent);
  transform: translateX(4px);
}

.subcategory-menu strong {
  display: block;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 0.2rem;
}

.subcategory-menu span {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.subcategory-back {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  padding: 0.4rem 0;
  cursor: pointer;
  font-family: var(--font-sans);
  font-size: 0.85rem;
  transition: color 0.2s ease;
  margin-bottom: 0.5rem;
  display: block;
}

.subcategory-back:hover {
  color: var(--text-primary);
}

footer {
  text-align: center;
  padding: 2rem;
  color: var(--text-secondary);
  font-size: 0.85rem;
}

footer a {
  color: var(--text-primary);
  text-decoration: none;
  transition: color 0.2s ease;
}

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