/* ============================================
   PasteBoard — style.css
   Aesthetic: Dark Obsidian Studio
   ============================================ */

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

:root {
  --bg:        #080810;
  --bg-card:   #0f0f1a;
  --bg-panel:  #131325;
  --bg-code:   #0a0a14;
  --border:    rgba(255,255,255,0.07);
  --border-hi: rgba(0,224,255,0.3);
  --accent:    #00e0ff;
  --accent2:   #7b61ff;
  --accent3:   #39ff7a;
  --text:      #e8e8f0;
  --text-muted:#8888aa;
  --text-dim:  #444460;
  --font-display: 'Syne', sans-serif;
  --font-mono:    'JetBrains Mono', monospace;
  --radius:    12px;
  --radius-lg: 20px;
  --shadow:    0 24px 80px rgba(0,0,0,0.6);
  --glow:      0 0 60px rgba(0,224,255,0.08);
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-display);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  overflow-x: hidden;
}

/* ---- Background ---- */
.bg-grid {
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,224,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,224,255,0.03) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
  z-index: 0;
}

.bg-glow {
  position: fixed;
  top: -200px;
  left: 50%;
  transform: translateX(-50%);
  width: 900px;
  height: 600px;
  background: radial-gradient(ellipse at center, rgba(123,97,255,0.12) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

/* ---- Container ---- */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* ---- Header ---- */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 16px 0;
  background: rgba(8,8,16,0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--accent);
}

.logo-icon {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
}

.logo-text {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.2rem;
  color: var(--text);
  letter-spacing: -0.02em;
}

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

.header-nav {
  display: flex;
  align-items: center;
  gap: 16px;
}

.badge {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--accent);
  background: rgba(0,224,255,0.08);
  border: 1px solid rgba(0,224,255,0.2);
  padding: 3px 8px;
  border-radius: 20px;
  letter-spacing: 0.05em;
}

.gh-link {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.85rem;
  transition: color 0.2s;
}

.gh-link:hover { color: var(--text); }

/* ---- Hero ---- */
.hero {
  padding: 80px 0 48px;
  text-align: center;
  position: relative;
  z-index: 1;
}

.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 20px;
  opacity: 0;
  animation: fadeUp 0.6s ease 0.1s forwards;
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: var(--text);
  margin-bottom: 24px;
  opacity: 0;
  animation: fadeUp 0.6s ease 0.2s forwards;
}

.hero-accent {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent2) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-sub {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 580px;
  margin: 0 auto;
  line-height: 1.7;
  opacity: 0;
  animation: fadeUp 0.6s ease 0.3s forwards;
}

/* ---- Main ---- */
.main-content {
  padding-bottom: 80px;
  position: relative;
  z-index: 1;
}

/* ---- Upload Zone ---- */
.upload-section {
  opacity: 0;
  animation: fadeUp 0.6s ease 0.4s forwards;
}

.upload-zone {
  position: relative;
  border: 2px dashed var(--border-hi);
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  cursor: pointer;
  transition: border-color 0.25s, background 0.25s, box-shadow 0.25s;
  overflow: hidden;
  min-height: 340px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.upload-zone:hover,
.upload-zone.drag-over {
  border-color: var(--accent);
  background: rgba(0,224,255,0.03);
  box-shadow: 0 0 60px rgba(0,224,255,0.1);
}

.upload-zone.drag-over .drop-overlay { opacity: 1; pointer-events: all; }

.upload-zone-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  padding: 48px 32px;
  text-align: center;
}

.upload-icon-wrap {
  width: 72px;
  height: 72px;
  background: rgba(0,224,255,0.07);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1.5px solid rgba(0,224,255,0.2);
  color: var(--accent);
  transition: transform 0.3s, box-shadow 0.3s;
}

.upload-zone:hover .upload-icon-wrap {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0,224,255,0.15);
}

.upload-icon { width: 32px; height: 32px; }

.upload-title {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.02em;
}

.upload-desc {
  color: var(--text-muted);
  font-size: 0.9rem;
}

kbd {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.15);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--text);
}

.upload-formats {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: center;
}

.upload-formats span {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  padding: 3px 8px;
  border-radius: 4px;
  color: var(--text-muted);
}

.upload-btn {
  margin-top: 8px;
  padding: 12px 28px;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #000;
  border: none;
  border-radius: 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.9rem;
  cursor: pointer;
  letter-spacing: 0.02em;
  transition: transform 0.2s, box-shadow 0.2s, opacity 0.2s;
}

.upload-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0,224,255,0.3);
}

/* Drop overlay */
.drop-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,224,255,0.06);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s;
  border-radius: var(--radius-lg);
}

.drop-overlay-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  color: var(--accent);
  font-size: 1.2rem;
  font-weight: 700;
}

/* ---- Result Section ---- */
.result-section {
  opacity: 0;
  animation: fadeIn 0.4s ease forwards;
}

.result-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  padding: 14px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.result-file-info {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
}

.result-file-info strong {
  color: var(--text);
  font-weight: 600;
}

.btn-reset {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-muted);
  font-family: var(--font-display);
  font-size: 0.82rem;
  cursor: pointer;
  transition: color 0.2s, background 0.2s, border-color 0.2s;
}

.btn-reset:hover {
  color: var(--text);
  background: rgba(255,255,255,0.07);
  border-color: rgba(255,255,255,0.15);
}

/* ---- Result Grid ---- */
.result-grid {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 20px;
  align-items: start;
}

@media (max-width: 768px) {
  .result-grid { grid-template-columns: 1fr; }
}

/* ---- Preview Panel ---- */
.panel {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
}

.panel-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.panel-meta {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--accent);
}

.preview-container {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  min-height: 200px;
  background: repeating-conic-gradient(rgba(255,255,255,0.02) 0% 25%, transparent 0% 50%) 0 0/20px 20px;
}

.preview-container img {
  max-width: 100%;
  max-height: 280px;
  object-fit: contain;
  border-radius: 6px;
  box-shadow: 0 8px 30px rgba(0,0,0,0.4);
}

.preview-stats {
  padding: 14px 18px;
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.stat-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.72rem;
}

.stat-label { color: var(--text-muted); }
.stat-value { color: var(--text); }
.stat-value.warn { color: #ffaa00; }
.stat-value.ok { color: var(--accent3); }

/* ---- Codes Panel ---- */
.codes-panel {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

/* ---- Tabs ---- */
.tab-nav {
  display: flex;
  border-bottom: 1px solid var(--border);
  overflow-x: auto;
}

.tab-btn {
  flex-shrink: 0;
  padding: 12px 18px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-muted);
  background: none;
  border: none;
  cursor: pointer;
  transition: color 0.2s, background 0.2s;
  position: relative;
}

.tab-btn::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transition: transform 0.2s;
}

.tab-btn:hover { color: var(--text); background: rgba(255,255,255,0.02); }
.tab-btn.active { color: var(--accent); }
.tab-btn.active::after { transform: scaleX(1); }

.tab-panels { padding: 0; }
.tab-panel { display: none; padding: 20px; flex-direction: column; gap: 12px; }
.tab-panel.active { display: flex; }

/* ---- Code Block ---- */
.code-block-wrap {
  display: flex;
  flex-direction: column;
  gap: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.code-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  background: rgba(255,255,255,0.02);
  border-bottom: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
}

.copy-btn {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 4px 10px;
  background: rgba(0,224,255,0.07);
  border: 1px solid rgba(0,224,255,0.2);
  border-radius: 5px;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  cursor: pointer;
  transition: background 0.2s, box-shadow 0.2s;
}

.copy-btn:hover {
  background: rgba(0,224,255,0.14);
  box-shadow: 0 0 12px rgba(0,224,255,0.15);
}

.copy-btn.copied {
  background: rgba(57,255,122,0.1);
  border-color: rgba(57,255,122,0.3);
  color: var(--accent3);
}

.code-block {
  background: var(--bg-code);
  padding: 16px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  line-height: 1.7;
  color: #a0d8ef;
  white-space: pre-wrap;
  word-break: break-all;
  max-height: 180px;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: rgba(255,255,255,0.1) transparent;
}

.code-block::-webkit-scrollbar { width: 4px; }
.code-block::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 2px; }

.code-note {
  font-size: 0.78rem;
  color: var(--text-muted);
  line-height: 1.6;
  padding: 2px 0;
}

.code-note code {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  background: rgba(255,255,255,0.06);
  padding: 1px 5px;
  border-radius: 3px;
  color: var(--accent);
}

/* ---- Quick Actions ---- */
.quick-actions {
  display: flex;
  gap: 10px;
  padding: 16px 20px;
  border-top: 1px solid var(--border);
  flex-wrap: wrap;
}

.action-btn {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 9px 16px;
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  border-radius: 7px;
  color: var(--text-muted);
  font-family: var(--font-display);
  font-size: 0.82rem;
  cursor: pointer;
  transition: all 0.2s;
}

.action-btn:hover {
  color: var(--text);
  background: rgba(255,255,255,0.06);
  border-color: rgba(255,255,255,0.15);
}

/* ---- History ---- */
.history-section {
  margin-top: 32px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.history-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
}

.btn-clear-history {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-dim);
  background: none;
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 3px 8px;
  cursor: pointer;
  transition: color 0.2s;
}

.btn-clear-history:hover { color: var(--text-muted); }

.history-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  gap: 1px;
  background: var(--border);
}

.history-thumb {
  position: relative;
  aspect-ratio: 1;
  cursor: pointer;
  overflow: hidden;
  background: var(--bg-code);
}

.history-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s;
}

.history-thumb:hover img { transform: scale(1.05); }

.history-thumb-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.2s;
  font-size: 0.65rem;
  font-family: var(--font-mono);
  color: var(--accent);
  text-align: center;
  padding: 8px;
}

.history-thumb:hover .history-thumb-overlay { opacity: 1; }

/* ---- Toast ---- */
.toast {
  position: fixed;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%) translateY(80px);
  background: rgba(20,20,36,0.95);
  border: 1px solid rgba(57,255,122,0.3);
  color: var(--accent3);
  padding: 10px 20px;
  border-radius: 30px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  display: flex;
  align-items: center;
  gap: 8px;
  backdrop-filter: blur(20px);
  box-shadow: 0 8px 32px rgba(0,0,0,0.5);
  transition: transform 0.35s cubic-bezier(0.34, 1.56, 0.64, 1), opacity 0.3s;
  z-index: 1000;
  opacity: 0;
}

.toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

/* ---- Features Strip ---- */
.features-strip {
  padding: 60px 0;
  border-top: 1px solid var(--border);
  position: relative;
  z-index: 1;
}

.features-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 32px;
}

.feature-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.feature-icon {
  font-size: 1.5rem;
  flex-shrink: 0;
  line-height: 1;
}

.feature-item strong {
  display: block;
  font-weight: 700;
  font-size: 0.95rem;
  margin-bottom: 4px;
  color: var(--text);
}

.feature-item p {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ---- Footer ---- */
.footer {
  border-top: 1px solid var(--border);
  padding: 24px 0;
  position: relative;
  z-index: 1;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-credits, .footer-copy {
  font-size: 0.8rem;
  color: var(--text-dim);
}

/* ---- Animations ---- */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* ---- Scrollbar ---- */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.08); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.14); }

/* ---- Responsive ---- */
@media (max-width: 600px) {
  .hero { padding: 48px 0 32px; }
  .tab-btn { padding: 10px 12px; }
  .features-row { grid-template-columns: 1fr 1fr; }
  .footer-inner { flex-direction: column; align-items: flex-start; gap: 4px; }
}