/* ============================================================
   projects.css  —  Portfolio Projects Section
   Design system matched to style.css (AHRN portfolio)
   ============================================================ */

/* ── CSS Variables (mirrors style.css root) ── */
:root {
  --bg:          #0a0a0a;
  --surface:     #111111;
  --glass:       rgba(255, 255, 255, 0.04);
  --border:      rgba(255, 255, 255, 0.08);
  --card-border: rgba(142, 242, 36, 0.536);
  --shadow1:     rgba(142, 242, 36, 0.09);
  --shadow2:     rgba(142, 242, 36, 0.28);
  --accent:      #85eb18;
  --accent-tag:  #84fc03;
  --text:        #eaeaea;
  --muted:       #b0b0b0;

  --font-display: 'Syne', sans-serif;
  --font-body:    'DM Sans', sans-serif;
  --font-tag:     'Red Rose', sans-serif;
}

/* ── Light mode override ── */
body.light-mode {
  --bg:          #fff;
  --surface:     rgb(247, 249, 250);
  --glass:       rgba(59, 130, 246, 0.03);
  --border:      rgba(0, 0, 0, 0.133);
  --card-border: rgba(59, 130, 246, 0.25);
  --shadow1:     rgba(59, 130, 246, 0.05);
  --shadow2:     rgba(59, 130, 246, 0.14);
  --accent:      #3f78f3;
  --accent-tag:  #47b2f1;
  --text:        #0a0f1e;
  --muted:       #2b2c2d;
}

/* ── Base reset (scoped) ── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
}

/* ── Accessibility ── */
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ============================================================
   SECTION WRAPPER
   ============================================================ */
.projects-section {
  max-width: 1200px; margin: 0 auto; 
  padding: 7rem 0rem;
  position: relative;
}

/* ── Section header ── */
.section-header {
  margin-bottom: 2.5rem;
}

.section-label {
  display: block;
  font-family: var(--font-body);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.45rem;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800;
  letter-spacing: -0.5px;
  color: var(--text);
}

/* ============================================================
   FILTER BUTTONS
   ============================================================ */
.filters {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 2rem;
}

.filter-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  padding: 6px 16px;
  border-radius: 20px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  transition: all 0.2s ease;
}

.filter-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.filter-btn.active {
  background: var(--accent);
  color: #0a0a0a;
  border-color: var(--accent);
  font-weight: 600;
}

.filter-count {
  font-size: 0.68rem;
  opacity: 0.75;
}

/* ============================================================
   PROJECTS GRID
   ============================================================ */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1rem;
}

/* ============================================================
   PROJECT CARD
   ============================================================ */
.project-card {
  background: var(--glass);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.3rem 1.4rem;
  display: flex;
  flex-direction: column;
  gap: 12px;
  position: relative;
  overflow: hidden;
  transition: border-color 0.3s ease, transform 0.25s ease, box-shadow 0.3s ease;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

/* Subtle green glow on top edge */
.project-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 0% 0%, var(--shadow1), transparent 65%);
  opacity: 0;
  transition: opacity 0.4s ease;
  pointer-events: none;
}

.project-card:hover {
  border-color: var(--card-border);
  transform: translateY(-3px);
  box-shadow:
    0 8px 32px var(--shadow1),
    0 0 0 0.5px var(--card-border);
}

.project-card:hover::before {
  opacity: 1;
}

/* hidden (filtered out) */
.project-card.hidden {
  display: none;
}

/* ── Card header row ── */
.card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 10px;
}

/* ── Card meta (badge + year) ── */
.card-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 5px;
}

/* ── Type badges ── */
.type-badge {
  font-family: var(--font-tag);
  font-size: 0.60rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 3px 9px;
  border-radius: 10px;
}

.badge-web {
  background: rgba(59, 130, 246, 0.12);
  color: #60a5fa;
  border: 0.5px solid rgba(59, 130, 246, 0.25);
}

body.light-mode .badge-web {
  background: #E6F1FB;
  color: #0C447C;
  border-color: rgba(12, 68, 124, 0.18);
}

.badge-app {
  background: rgba(133, 235, 24, 0.10);
  color: var(--accent);
  border: 0.5px solid rgba(133, 235, 24, 0.25);
}

body.light-mode .badge-app {
  background: #EAF3DE;
  color: #27500A;
  border-color: rgba(39, 80, 10, 0.18);
}

/* ── Year / subtitle ── */
.card-year {
  font-size: 0.70rem;
  color: var(--muted);
  font-style: italic;
  opacity: 0.8;
}

/* ── Card title ── */
.card-title {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.25;
  letter-spacing: -0.2px;
}

/* ── Card icon ── */
.card-icon {
  font-size: 1.25rem;
  color: var(--muted);
  opacity: 0.55;
  flex-shrink: 0;
  margin-top: 2px;
  transition: color 0.3s, opacity 0.3s;
}

.project-card:hover .card-icon {
  color: var(--accent);
  opacity: 1;
}

/* ── Description ── */
.card-desc {
  font-size: 0.82rem;
  color: var(--muted);
  line-height: 1.65;
}

/* ── Tags ── */
.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
}

.tag {
  font-family: var(--font-tag);
  font-size: 0.68rem;
  font-weight: 400;
  padding: 3px 9px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.04);
  color: var(--muted);
  border: 0.5px solid var(--border);
  letter-spacing: 0.3px;
  transition: border-color 0.2s, color 0.2s;
}

.project-card:hover .tag {
  border-color: rgba(133, 235, 24, 0.18);
}

body.light-mode .tag {
  background: rgba(0, 0, 0, 0.04);
}

/* ── Action buttons ── */
.card-actions {
  display: flex;
  gap: 8px;
  margin-top: auto;
  padding-top: 8px;
  border-top: 0.5px solid var(--border);
}

.action-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-family: var(--font-body);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: 6px 14px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  text-decoration: none;
  transition: all 0.2s ease;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.action-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--shadow1);
}

/* Primary (solid accent) button */
.action-btn.action-primary {
  background: var(--accent);
  color: #0a0a0a;
  border-color: var(--accent);
  font-weight: 600;
  box-shadow: 0 0 12px var(--shadow1);
}

.action-btn.action-primary:hover {
  background: var(--accent-tag);
  border-color: var(--accent-tag);
  box-shadow: 0 0 20px var(--shadow2);
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1080px) {
  .projects-section {
    padding: 4rem 5vw;
  }
}

@media (max-width: 768px) {
  .projects-section {
    padding: 3.5rem 1.5rem;
  }

  .projects-grid {
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 12px;
  }
}

@media (max-width: 480px) {
  .projects-section {
    padding: 3rem 1.2rem;
  }

  .projects-grid {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .project-card {
    padding: 1.1rem 1.1rem;
  }

  .filters {
    gap: 6px;
  }

  .filter-btn {
    font-size: 0.70rem;
    padding: 5px 12px;
  }
}