/* =========================================================
   DeepFake Detection System - style.css
   Dark AI/security theme, fully responsive.
   ========================================================= */

:root {
  --bg: #060a13;
  --bg-2: #0b1220;
  --card: rgba(15, 23, 42, 0.72);
  --card-solid: #0f172a;
  --border: rgba(148, 163, 184, 0.16);
  --text: #e2e8f0;
  --muted: #94a3b8;
  --accent: #22d3ee;
  --accent-2: #a78bfa;
  --green: #34d399;
  --red: #f87171;
  --amber: #fbbf24;
  --radius: 16px;
}

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

/* Make sure the hidden attribute always wins over any display rule */
[hidden] { display: none !important; }

html { scroll-behavior: smooth; }

body {
  font-family: "Segoe UI", system-ui, -apple-system, Roboto, Arial, sans-serif;
  background:
    radial-gradient(900px 500px at 85% -10%, rgba(167, 139, 250, 0.14), transparent 60%),
    radial-gradient(800px 500px at 10% 0%, rgba(34, 211, 238, 0.12), transparent 55%),
    var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  line-height: 1.55;
}

.bg-grid {
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(rgba(148, 163, 184, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 163, 184, 0.05) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(ellipse at 50% 20%, black 30%, transparent 75%);
  pointer-events: none;
}

main {
  width: min(1080px, calc(100% - 40px));
  margin: 0 auto;
  padding: 26px 0 50px;
  flex: 1;
}

/* ---------------- Navbar ---------------- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 50;
  width: min(1080px, calc(100% - 40px));
  margin: 14px auto 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 18px;
  border-radius: var(--radius);
  background: rgba(8, 12, 22, 0.8);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text);
  font-weight: 700;
  font-size: 1.06rem;
  letter-spacing: 0.02em;
}
.brand em {
  font-style: normal;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.nav-links { display: flex; gap: 6px; }
.nav-links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.93rem;
  padding: 8px 13px;
  border-radius: 10px;
  transition: color 0.2s, background 0.2s;
}
.nav-links a:hover { color: var(--text); background: rgba(148, 163, 184, 0.08); }
.nav-links a.active {
  color: #06121a;
  font-weight: 600;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
}

/* ---------------- Flash messages ---------------- */
.flash-stack {
  width: min(1080px, calc(100% - 40px));
  margin: 16px auto 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.flash {
  padding: 11px 16px;
  border-radius: 12px;
  font-size: 0.95rem;
  border: 1px solid;
  animation: slideIn 0.25s ease;
}
.flash-error {
  background: rgba(248, 113, 113, 0.1);
  border-color: rgba(248, 113, 113, 0.35);
  color: #fecaca;
}
.flash-success {
  background: rgba(52, 211, 153, 0.1);
  border-color: rgba(52, 211, 153, 0.35);
  color: #bbf7d0;
}
@keyframes slideIn {
  from { opacity: 0; transform: translateY(-6px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ---------------- Hero ---------------- */
.hero { text-align: center; padding: 46px 10px 26px; }
.hero h1 {
  font-size: clamp(1.9rem, 4.5vw, 3rem);
  letter-spacing: -0.02em;
  line-height: 1.15;
}
.grad-text {
  background: linear-gradient(90deg, #34d399, #22d3ee);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.grad-text-red {
  background: linear-gradient(90deg, #f472b6, #f87171);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero p {
  color: var(--muted);
  max-width: 640px;
  margin: 14px auto 18px;
  font-size: 1.02rem;
}
.chip-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 9px;
}
.chip {
  font-size: 0.82rem;
  color: var(--text);
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(148, 163, 184, 0.07);
  white-space: nowrap;
}

/* ---------------- Panels & cards ---------------- */
.panel {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  backdrop-filter: blur(8px);
  box-shadow: 0 18px 45px rgba(2, 6, 17, 0.5);
}

.upload-panel {
  max-width: 720px;
  margin: 0 auto;
  padding: 22px;
}

.tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  padding: 6px;
  border-radius: 12px;
  background: rgba(2, 6, 17, 0.55);
  border: 1px solid var(--border);
  margin-bottom: 16px;
}
.tab {
  appearance: none;
  border: 0;
  cursor: pointer;
  padding: 11px 8px;
  border-radius: 9px;
  font-size: 0.98rem;
  font-weight: 600;
  color: var(--muted);
  background: transparent;
  transition: background 0.2s, color 0.2s, box-shadow 0.2s;
}
.tab:hover { color: var(--text); }
.tab.active {
  color: #06121a;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  box-shadow: 0 6px 18px rgba(34, 211, 238, 0.25);
}

/* ---------------- Dropzone ---------------- */
.dropzone {
  display: block;
  border: 1.6px dashed rgba(148, 163, 184, 0.35);
  border-radius: 14px;
  padding: 38px 18px;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s, transform 0.15s;
  overflow: hidden;
  position: relative;
}
.dropzone:hover, .dropzone.dragover {
  border-color: var(--accent);
  background: rgba(34, 211, 238, 0.06);
}
.dropzone.dragover { transform: scale(1.01); }
.dz-title { font-size: 1.08rem; font-weight: 600; margin-top: 10px; }
.dz-sub { color: var(--muted); font-size: 0.86rem; margin-top: 4px; }

.dropzone input[type="file"] {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

.preview {
  position: relative;
  margin-top: 14px;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: rgba(2, 6, 17, 0.45);
}
.preview img,
.preview video {
  width: 92px;
  height: 92px;
  object-fit: cover;
  border-radius: 10px;
  background: #000;
  flex-shrink: 0;
}
.preview-meta {
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 0;
}
.preview-meta span:first-child {
  font-weight: 600;
  overflow-wrap: anywhere;
}
.preview-meta span:last-child { color: var(--muted); font-size: 0.85rem; }
.remove-btn {
  margin-left: auto;
  appearance: none;
  border: 1px solid var(--border);
  background: rgba(148, 163, 184, 0.08);
  color: var(--muted);
  width: 34px;
  height: 34px;
  border-radius: 50%;
  font-size: 1.15rem;
  cursor: pointer;
  flex-shrink: 0;
  transition: color 0.2s, border-color 0.2s;
}
.remove-btn:hover { color: var(--red); border-color: var(--red); }

.limits {
  margin-top: 10px;
  text-align: center;
  color: var(--muted);
  font-size: 0.82rem;
}

/* ---------------- Buttons ---------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
  border-radius: 12px;
  font-size: 0.95rem;
  font-weight: 600;
  padding: 11px 20px;
  transition: transform 0.15s, box-shadow 0.2s, filter 0.2s;
}
.btn:hover { transform: translateY(-1px); filter: brightness(1.07); }
.btn:active { transform: translateY(0); }
.btn-primary {
  color: #06121a;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  box-shadow: 0 10px 26px rgba(34, 211, 238, 0.28);
}
.btn-ghost {
  color: var(--text);
  background: rgba(148, 163, 184, 0.09);
  border-color: var(--border);
}
.btn-danger {
  color: #fecaca;
  background: rgba(248, 113, 113, 0.12);
  border-color: rgba(248, 113, 113, 0.4);
}
.btn-lg {
  width: 100%;
  margin-top: 18px;
  font-size: 1.08rem;
  padding: 15px 22px;
  border-radius: 14px;
}
.btn-sm { padding: 8px 14px; font-size: 0.85rem; }
.btn-xs { padding: 5px 10px; font-size: 0.78rem; border-radius: 9px; }
.btn-icon { font-size: 1.1em; }

/* ---------------- Stats ---------------- */
.mini-stats, .stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 14px;
  margin: 26px auto 0;
}
.stat-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-align: center;
  padding: 20px 12px;
  backdrop-filter: blur(8px);
}
.stat-value {
  display: block;
  font-size: 1.9rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.stat-label { color: var(--muted); font-size: 0.86rem; }
.stat-green .stat-value {
  background: linear-gradient(90deg, #34d399, #86efac);
  -webkit-background-clip: text;
  background-clip: text;
}
.stat-red .stat-value {
  background: linear-gradient(90deg, #f87171, #fca5a5);
  -webkit-background-clip: text;
  background-clip: text;
}

/* ---------------- Steps ---------------- */
.steps { margin-top: 48px; text-align: center; }
.steps h2 { font-size: 1.5rem; margin-bottom: 18px; }
.steps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 14px;
  text-align: left;
}
.step-card { padding: 20px; }
.step-num {
  font-size: 0.85rem;
  font-weight: 800;
  color: var(--accent);
  letter-spacing: 0.14em;
}
.step-card h3 { margin: 8px 0 6px; font-size: 1.08rem; }
.step-card p { color: var(--muted); font-size: 0.92rem; }

/* ---------------- Result page ---------------- */
.page-title h1 { font-size: 1.7rem; margin-bottom: 4px; }
.muted { color: var(--muted); }

.verdict-hero {
  display: flex;
  align-items: center;
  gap: 28px;
  padding: 30px;
  flex-wrap: wrap;
  justify-content: center;
  text-align: left;
  position: relative;
  overflow: hidden;
}
.verdict-real { border-color: rgba(52, 211, 153, 0.4); }
.verdict-fake { border-color: rgba(248, 113, 113, 0.45); }

.ring-bg {
  fill: none;
  stroke: rgba(148, 163, 184, 0.14);
  stroke-width: 9;
}
.ring-fg {
  fill: none;
  stroke-width: 9;
  stroke-linecap: round;
  transform: rotate(-90deg);
  transform-origin: 50% 50%;
  filter: drop-shadow(0 0 6px currentColor);
}
.ring-green { stroke: var(--green); color: var(--green); }
.ring-red { stroke: var(--red); color: var(--red); }
.ring-grey { stroke: var(--muted); color: var(--muted); }
.ring-text {
  fill: var(--text);
  font-size: 1.55rem;
  font-weight: 800;
}
.ring-sub { fill: var(--muted); font-size: 0.5rem; letter-spacing: 0.12em; }

.verdict-main { flex: 1; min-width: 220px; }
.verdict-kicker {
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.75rem;
  color: var(--muted);
  margin-bottom: 8px;
}
.verdict-badge {
  font-size: clamp(2rem, 5vw, 3rem);
  letter-spacing: -0.01em;
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.badge-real { color: var(--green); text-shadow: 0 0 24px rgba(52, 211, 153, 0.45); }
.badge-unknown { color: var(--muted); }
.badge-fake {
  color: var(--red);
  text-shadow: 0 0 24px rgba(248, 113, 113, 0.5);
  animation: pulseRed 1.6s ease-in-out infinite;
}
@keyframes pulseRed {
  0%, 100% { text-shadow: 0 0 18px rgba(248, 113, 113, 0.35); }
  50%      { text-shadow: 0 0 34px rgba(248, 113, 113, 0.75); }
}
.verdict-note { color: var(--muted); margin-top: 10px; font-size: 0.94rem; max-width: 480px; }

.prob-bars { margin-top: 16px; padding: 20px 22px; }
.prob-row {
  display: grid;
  grid-template-columns: 52px 1fr 58px;
  align-items: center;
  gap: 12px;
  padding: 7px 0;
}
.prob-label { font-size: 0.88rem; font-weight: 700; }
.prob-real-label { color: var(--green); }
.prob-fake-label { color: var(--red); }
.prob-track {
  height: 12px;
  border-radius: 999px;
  background: rgba(2, 6, 17, 0.6);
  border: 1px solid var(--border);
  overflow: hidden;
}
.prob-fill {
  height: 100%;
  border-radius: 999px;
  animation: growBar 0.9s cubic-bezier(0.2, 0.7, 0.3, 1);
}
.fill-real { background: linear-gradient(90deg, #059669, #34d399); }
.fill-fake { background: linear-gradient(90deg, #dc2626, #f87171); }
.prob-value { text-align: right; font-size: 0.9rem; color: var(--muted); }
@keyframes growBar { from { transform: scaleX(0); } to { transform: scaleX(1); } }
.prob-fill { transform-origin: left center; }

.details-panel { margin-top: 16px; padding: 24px; }
.details-panel h2, .table-panel h2, .recent-panel h2 {
  font-size: 1.2rem;
  margin-bottom: 16px;
}
.detail-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 10px;
}
.detail-item {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: rgba(2, 6, 17, 0.4);
}
.detail-item span { color: var(--muted); font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.06em; }
.detail-item strong { font-size: 0.97rem; overflow-wrap: anywhere; }

.action-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

/* ---------------- History page ---------------- */
.table-panel, .recent-panel { margin-top: 18px; padding: 22px; }
.table-head-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}
.table-head-row h2 { margin-bottom: 0; }

.table-wrap { overflow-x: auto; border-radius: 12px; border: 1px solid var(--border); }
table { width: 100%; border-collapse: collapse; font-size: 0.9rem; min-width: 780px; }
thead th {
  text-align: left;
  padding: 11px 13px;
  background: rgba(2, 6, 17, 0.65);
  color: var(--muted);
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  white-space: nowrap;
}
tbody td {
  padding: 11px 13px;
  border-top: 1px solid var(--border);
  white-space: nowrap;
}
tbody tr:hover { background: rgba(148, 163, 184, 0.05); }
.cell-file { max-width: 220px; overflow: hidden; text-overflow: ellipsis; }

.chip-pred {
  padding: 4px 11px;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}
.chip-real { color: #052e21; background: linear-gradient(90deg, #34d399, #6ee7b7); }
.chip-fake { color: #2f0707; background: linear-gradient(90deg, #f87171, #fda4af); }
.chip-unknown { color: #0b1220; background: #94a3b8; }

.empty-state { text-align: center; padding: 38px 10px; }
.empty-state p { color: var(--muted); margin-bottom: 14px; }

.recent-list { list-style: none; display: flex; flex-direction: column; gap: 8px; }
.recent-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 13px;
  border: 1px solid var(--border);
  border-radius: 11px;
  background: rgba(2, 6, 17, 0.4);
}
.dot { width: 10px; height: 10px; border-radius: 50%; flex-shrink: 0; }
.dot-real { background: var(--green); box-shadow: 0 0 10px rgba(52, 211, 153, 0.7); }
.dot-fake { background: var(--red); box-shadow: 0 0 10px rgba(248, 113, 113, 0.7); }
.dot-unknown { background: var(--muted); }
.recent-name {
  font-weight: 600;
  max-width: 320px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.recent-meta { margin-left: auto; color: var(--muted); font-size: 0.83rem; white-space: nowrap; }

/* ---------------- Scanning overlay ---------------- */
.scanning-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 26px;
  background: rgba(4, 8, 16, 0.88);
  backdrop-filter: blur(6px);
}
.scanner {
  position: relative;
  width: 130px;
  height: 130px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
  padding: 6px;
  border-radius: 18px;
  border: 1px solid rgba(34, 211, 238, 0.4);
}
.scan-face span {
  border-radius: 6px;
  background: rgba(34, 211, 238, 0.14);
  border: 1px solid rgba(34, 211, 238, 0.25);
  animation: cellBlink 1.2s ease-in-out infinite;
}
.scan-face span:nth-child(2n) { animation-delay: 0.2s; }
.scan-face span:nth-child(3n) { animation-delay: 0.45s; }
@keyframes cellBlink {
  0%, 100% { opacity: 0.35; }
  50%      { opacity: 1; background: rgba(34, 211, 238, 0.3); }
}
.scan-line {
  position: absolute;
  left: 6px;
  right: 6px;
  height: 3px;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  box-shadow: 0 0 14px rgba(34, 211, 238, 0.8);
  animation: scanMove 1.5s ease-in-out infinite alternate;
}
@keyframes scanMove {
  from { top: 8px; }
  to   { top: 116px; }
}
.scan-status { color: var(--muted); letter-spacing: 0.08em; font-size: 0.95rem; }

/* ---------------- Footer ---------------- */
footer {
  border-top: 1px solid var(--border);
  margin-top: 30px;
  padding: 20px;
  text-align: center;
  color: var(--muted);
  font-size: 0.84rem;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

/* ---------------- Responsive ---------------- */
@media (max-width: 640px) {
  .navbar { flex-direction: column; gap: 8px; }
  .nav-links { justify-content: center; }
  .hero { padding-top: 30px; }
  .verdict-hero { text-align: center; flex-direction: column; }
  .recent-meta { margin-left: 0; white-space: normal; }
  .recent-list li { flex-wrap: wrap; }
  .action-row .btn { width: 100%; }
}