/* ============================================================
   Dhyey Space — Design System
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500&display=swap');

/* ── CSS Custom Properties ─────────────────────────────── */
:root {
  /* Colour palette */
  --clr-bg-dark:       #0d0f17;
  --clr-bg-card:       #13161f;
  --clr-bg-elevated:   #1a1d2b;
  --clr-surface:       #21253a;
  --clr-border:        #2d3152;
  --clr-border-subtle: #1e2238;

  --clr-primary:       #6c63ff;
  --clr-primary-light: #8b85ff;
  --clr-primary-dark:  #5149e0;
  --clr-primary-glow:  rgba(108, 99, 255, 0.35);

  --clr-accent:        #00d4ff;
  --clr-accent-glow:   rgba(0, 212, 255, 0.25);

  --clr-success:       #22c55e;
  --clr-warning:       #f59e0b;
  --clr-danger:        #ef4444;

  --clr-text-primary:   #f1f2f8;
  --clr-text-secondary: #9da3c0;
  --clr-text-muted:     #5c6287;

  /* Typography */
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Courier New', monospace;

  /* Spacing */
  --sp-1: 0.25rem;  --sp-2: 0.5rem;   --sp-3: 0.75rem;
  --sp-4: 1rem;     --sp-5: 1.25rem;  --sp-6: 1.5rem;
  --sp-8: 2rem;     --sp-10: 2.5rem;  --sp-12: 3rem;
  --sp-16: 4rem;    --sp-20: 5rem;    --sp-24: 6rem;

  /* Radius */
  --r-sm: 6px;   --r-md: 12px;  --r-lg: 18px;
  --r-xl: 24px;  --r-full: 9999px;

  /* Shadows */
  --shadow-sm:  0 1px 3px rgba(0,0,0,.4), 0 1px 2px rgba(0,0,0,.3);
  --shadow-md:  0 4px 16px rgba(0,0,0,.5), 0 2px 6px rgba(0,0,0,.3);
  --shadow-lg:  0 10px 40px rgba(0,0,0,.6), 0 4px 12px rgba(0,0,0,.4);
  --shadow-glow: 0 0 30px var(--clr-primary-glow);

  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --t-fast: 150ms; --t-base: 250ms; --t-slow: 400ms;
}

/* Light mode overrides */
[data-theme="light"] {
  --clr-bg-dark:       #f4f6fb;
  --clr-bg-card:       #ffffff;
  --clr-bg-elevated:   #eef0f7;
  --clr-surface:       #e4e7f3;
  --clr-border:        #d1d5eb;
  --clr-border-subtle: #e8eaf4;
  --clr-text-primary:  #1a1d2b;
  --clr-text-secondary:#4a5080;
  --clr-text-muted:    #8a90b8;
  --shadow-sm:  0 1px 3px rgba(0,0,0,.08);
  --shadow-md:  0 4px 16px rgba(0,0,0,.12);
  --shadow-lg:  0 10px 40px rgba(0,0,0,.15);
}

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

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  background: var(--clr-bg-dark);
  color: var(--clr-text-primary);
  line-height: 1.6;
  min-height: 100vh;
  transition: background var(--t-base), color var(--t-base);
}

img { max-width: 100%; display: block; }
a { color: var(--clr-primary-light); text-decoration: none; }
a:hover { text-decoration: underline; }
ul, ol { list-style: none; }

/* ── Scrollbar ──────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--clr-bg-dark); }
::-webkit-scrollbar-thumb { background: var(--clr-border); border-radius: var(--r-full); }

/* ── Utility Classes ────────────────────────────────────── */
.container {
  width: 100%;
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 var(--sp-6);
}

.sr-only {
  position: absolute; width: 1px; height: 1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap;
}

/* ── Animated Background ────────────────────────────────── */
.bg-grid {
  position: fixed; inset: 0; z-index: -1;
  background-image:
    linear-gradient(var(--clr-border-subtle) 1px, transparent 1px),
    linear-gradient(90deg, var(--clr-border-subtle) 1px, transparent 1px);
  background-size: 40px 40px;
  opacity: 0.4;
  pointer-events: none;
}

.bg-glow {
  position: fixed; inset: 0; z-index: -1;
  background:
    radial-gradient(ellipse 80% 50% at 20% 20%, rgba(108,99,255,.12) 0%, transparent 60%),
    radial-gradient(ellipse 60% 40% at 80% 80%, rgba(0,212,255,.08) 0%, transparent 60%);
  pointer-events: none;
}

/* ── Navigation ─────────────────────────────────────────── */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(20px) saturate(150%);
  -webkit-backdrop-filter: blur(20px) saturate(150%);
  background: rgba(13, 15, 23, 0.85);
  border-bottom: 1px solid var(--clr-border-subtle);
  transition: background var(--t-base);
}

[data-theme="light"] .navbar { background: rgba(244,246,251,.85); }

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  font-weight: 800;
  font-size: 1.35rem;
  color: var(--clr-text-primary);
  letter-spacing: -0.03em;
  text-decoration: none !important;
}

.logo-icon {
  width: 36px; height: 36px;
  border-radius: var(--r-md);
  background: linear-gradient(135deg, var(--clr-primary), var(--clr-accent));
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem;
  box-shadow: 0 0 16px var(--clr-primary-glow);
}

.logo-text span { color: var(--clr-primary-light); }

.nav-actions { display: flex; align-items: center; gap: var(--sp-3); }

/* Theme toggle */
.theme-toggle {
  width: 40px; height: 40px;
  border-radius: var(--r-md);
  border: 1px solid var(--clr-border);
  background: var(--clr-bg-elevated);
  color: var(--clr-text-secondary);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem;
  transition: all var(--t-base) var(--ease-out);
}
.theme-toggle:hover {
  border-color: var(--clr-primary);
  color: var(--clr-primary-light);
  box-shadow: 0 0 12px var(--clr-primary-glow);
}

/* ── Buttons ─────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: var(--sp-3) var(--sp-5);
  border-radius: var(--r-md);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all var(--t-base) var(--ease-out);
  white-space: nowrap;
  text-decoration: none !important;
}

.btn-primary {
  background: linear-gradient(135deg, var(--clr-primary), var(--clr-primary-dark));
  color: #fff;
  box-shadow: 0 4px 20px var(--clr-primary-glow);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px var(--clr-primary-glow);
  filter: brightness(1.1);
}
.btn-primary:active { transform: translateY(0); }

.btn-secondary {
  background: var(--clr-bg-elevated);
  color: var(--clr-text-primary);
  border: 1px solid var(--clr-border);
}
.btn-secondary:hover {
  border-color: var(--clr-primary);
  color: var(--clr-primary-light);
  background: var(--clr-surface);
}

.btn-ghost {
  background: transparent;
  color: var(--clr-text-secondary);
  border: 1px solid transparent;
}
.btn-ghost:hover {
  background: var(--clr-bg-elevated);
  color: var(--clr-text-primary);
  border-color: var(--clr-border);
}

.btn-sm {
  padding: var(--sp-2) var(--sp-3);
  font-size: 0.82rem;
  border-radius: var(--r-sm);
}

.btn-lg {
  padding: var(--sp-4) var(--sp-8);
  font-size: 1rem;
  border-radius: var(--r-lg);
}

.btn-full { width: 100%; justify-content: center; }

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
}

/* ── Cards ──────────────────────────────────────────────── */
.card {
  background: var(--clr-bg-card);
  border: 1px solid var(--clr-border-subtle);
  border-radius: var(--r-xl);
  box-shadow: var(--shadow-md);
}

.card-glass {
  background: rgba(19, 22, 31, 0.7);
  backdrop-filter: blur(20px) saturate(150%);
  border: 1px solid var(--clr-border);
  border-radius: var(--r-xl);
}

[data-theme="light"] .card-glass {
  background: rgba(255, 255, 255, 0.8);
}

/* ── Upload Zone ─────────────────────────────────────────── */
.upload-zone {
  position: relative;
  border: 2px dashed var(--clr-border);
  border-radius: var(--r-xl);
  padding: var(--sp-16) var(--sp-8);
  text-align: center;
  cursor: pointer;
  transition: all var(--t-base) var(--ease-out);
  background: var(--clr-bg-elevated);
  overflow: hidden;
}

.upload-zone::before {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(135deg, var(--clr-primary-glow), var(--clr-accent-glow));
  opacity: 0;
  transition: opacity var(--t-base);
}

.upload-zone:hover,
.upload-zone.drag-over {
  border-color: var(--clr-primary);
  transform: scale(1.005);
  box-shadow: 0 0 40px var(--clr-primary-glow), var(--shadow-lg);
}

.upload-zone:hover::before,
.upload-zone.drag-over::before { opacity: 1; }

.upload-zone.drag-over {
  border-color: var(--clr-accent);
  box-shadow: 0 0 40px var(--clr-accent-glow), var(--shadow-lg);
}

.upload-zone-content {
  position: relative;
  z-index: 1;
}

.upload-icon {
  width: 72px; height: 72px;
  margin: 0 auto var(--sp-5);
  border-radius: var(--r-xl);
  background: linear-gradient(135deg, var(--clr-primary-dark), var(--clr-primary));
  display: flex; align-items: center; justify-content: center;
  font-size: 2rem;
  box-shadow: 0 8px 24px var(--clr-primary-glow);
  transition: transform var(--t-base) var(--ease-out);
}
.upload-zone:hover .upload-icon { transform: scale(1.1) rotate(-5deg); }

.upload-title {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: var(--sp-2);
  letter-spacing: -0.02em;
}

.upload-subtitle {
  color: var(--clr-text-secondary);
  font-size: 0.95rem;
  margin-bottom: var(--sp-6);
}

.upload-formats {
  display: flex;
  justify-content: center;
  gap: var(--sp-2);
  flex-wrap: wrap;
  margin-top: var(--sp-4);
}

.format-badge {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--r-full);
  padding: 2px 10px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--clr-text-secondary);
  font-family: var(--font-mono);
  letter-spacing: 0.05em;
}

/* ── Progress Bar ───────────────────────────────────────── */
.progress-container {
  display: none;
  margin-top: var(--sp-6);
}

.progress-container.visible { display: block; }

.progress-label {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--clr-text-secondary);
  margin-bottom: var(--sp-2);
}

.progress-bar-track {
  height: 6px;
  background: var(--clr-surface);
  border-radius: var(--r-full);
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--clr-primary), var(--clr-accent));
  border-radius: var(--r-full);
  width: 0%;
  transition: width 0.3s var(--ease-out);
  box-shadow: 0 0 10px var(--clr-primary-glow);
}

/* Indeterminate animation */
.progress-bar-fill.indeterminate {
  width: 40%;
  animation: indeterminate 1.5s ease-in-out infinite;
}

@keyframes indeterminate {
  0%   { transform: translateX(-100%); }
  100% { transform: translateX(350%); }
}

/* ── Result Panel ───────────────────────────────────────── */
.result-panel {
  display: none;
  margin-top: var(--sp-6);
  animation: slideUp var(--t-slow) var(--ease-out);
}

.result-panel.visible { display: block; }

@keyframes slideUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

.result-image-preview {
  width: 100%;
  max-height: 260px;
  object-fit: contain;
  border-radius: var(--r-lg);
  background: var(--clr-surface);
  margin-bottom: var(--sp-5);
}

.link-row {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  background: var(--clr-bg-dark);
  border: 1px solid var(--clr-border);
  border-radius: var(--r-md);
  padding: var(--sp-2) var(--sp-3);
  margin-bottom: var(--sp-3);
}

[data-theme="light"] .link-row { background: var(--clr-bg-elevated); }

.link-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--clr-text-muted);
  white-space: nowrap;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  min-width: 60px;
}

.link-value {
  flex: 1;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--clr-text-secondary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.copy-btn {
  flex-shrink: 0;
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--r-sm);
  padding: 4px 10px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--clr-text-secondary);
  cursor: pointer;
  transition: all var(--t-fast);
}
.copy-btn:hover { background: var(--clr-primary); color: #fff; border-color: var(--clr-primary); }
.copy-btn.copied { background: var(--clr-success); color: #fff; border-color: var(--clr-success); }

/* ── Toast Notifications ─────────────────────────────────── */
.toast-container {
  position: fixed;
  bottom: var(--sp-6);
  right: var(--sp-6);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
  pointer-events: none;
}

.toast {
  background: var(--clr-bg-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--r-md);
  padding: var(--sp-3) var(--sp-5);
  box-shadow: var(--shadow-lg);
  font-size: 0.9rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  min-width: 220px;
  max-width: 340px;
  animation: toastIn var(--t-base) var(--ease-out);
  pointer-events: all;
}

.toast.toast-exit { animation: toastOut var(--t-base) var(--ease-out) forwards; }

.toast-success { border-left: 3px solid var(--clr-success); }
.toast-error   { border-left: 3px solid var(--clr-danger); }
.toast-info    { border-left: 3px solid var(--clr-primary); }
.toast-warning { border-left: 3px solid var(--clr-warning); }

@keyframes toastIn {
  from { opacity: 0; transform: translateX(100%); }
  to   { opacity: 1; transform: translateX(0); }
}

@keyframes toastOut {
  from { opacity: 1; transform: translateX(0); }
  to   { opacity: 0; transform: translateX(100%); }
}

/* ── Hero / Stats section ────────────────────────────────── */
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  background: rgba(108,99,255,.15);
  border: 1px solid rgba(108,99,255,.3);
  border-radius: var(--r-full);
  padding: var(--sp-2) var(--sp-4);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--clr-primary-light);
  margin-bottom: var(--sp-4);
}

.hero-title {
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.1;
  margin-bottom: var(--sp-4);
}

.hero-title .gradient-text {
  background: linear-gradient(135deg, var(--clr-primary-light), var(--clr-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.1rem;
  color: var(--clr-text-secondary);
  max-width: 520px;
  margin-bottom: var(--sp-8);
}

/* ── Feature grid ───────────────────────────────────────── */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--sp-4);
  margin: var(--sp-12) 0;
}

.feature-card {
  background: var(--clr-bg-card);
  border: 1px solid var(--clr-border-subtle);
  border-radius: var(--r-lg);
  padding: var(--sp-5);
  transition: all var(--t-base) var(--ease-out);
}

.feature-card:hover {
  border-color: var(--clr-primary);
  transform: translateY(-4px);
  box-shadow: 0 8px 24px var(--clr-primary-glow);
}

.feature-icon {
  font-size: 1.6rem;
  margin-bottom: var(--sp-3);
}

.feature-title {
  font-weight: 700;
  font-size: 0.95rem;
  margin-bottom: var(--sp-1);
}

.feature-desc {
  font-size: 0.85rem;
  color: var(--clr-text-secondary);
}

/* ── Image Page ──────────────────────────────────────────── */
.image-page-wrapper {
  max-width: 900px;
  margin: 0 auto;
  padding: var(--sp-10) var(--sp-6);
}

.image-viewer {
  background: var(--clr-bg-card);
  border: 1px solid var(--clr-border-subtle);
  border-radius: var(--r-xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  margin-bottom: var(--sp-6);
}

.image-viewer img {
  width: 100%;
  max-height: 70vh;
  object-fit: contain;
  background: repeating-conic-gradient(
    var(--clr-surface) 0% 25%, var(--clr-bg-elevated) 0% 50%
  ) 0 0 / 20px 20px;
}

.image-meta-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--sp-4) var(--sp-5);
  border-top: 1px solid var(--clr-border-subtle);
  flex-wrap: wrap;
  gap: var(--sp-3);
}

.image-filename {
  font-weight: 600;
  font-family: var(--font-mono);
  font-size: 0.9rem;
}

.meta-badges {
  display: flex;
  gap: var(--sp-2);
  flex-wrap: wrap;
}

.meta-badge {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--r-full);
  padding: 2px 10px;
  font-size: 0.78rem;
  color: var(--clr-text-secondary);
}

.share-panel {
  background: var(--clr-bg-card);
  border: 1px solid var(--clr-border-subtle);
  border-radius: var(--r-xl);
  padding: var(--sp-6);
  box-shadow: var(--shadow-md);
}

.share-panel h2 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: var(--sp-5);
  color: var(--clr-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.8rem;
}

.share-actions {
  display: flex;
  gap: var(--sp-3);
  flex-wrap: wrap;
  margin-top: var(--sp-5);
}

/* ── 404 Page ────────────────────────────────────────────── */
.error-page {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  text-align: center;
  padding: var(--sp-8);
}

.error-code {
  font-size: 7rem;
  font-weight: 800;
  letter-spacing: -0.05em;
  line-height: 1;
  background: linear-gradient(135deg, var(--clr-primary), var(--clr-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--sp-4);
}

.error-title { font-size: 1.5rem; font-weight: 700; margin-bottom: var(--sp-3); }
.error-desc  { color: var(--clr-text-secondary); margin-bottom: var(--sp-8); }

/* ── Footer ──────────────────────────────────────────────── */
.footer {
  border-top: 1px solid var(--clr-border-subtle);
  padding: var(--sp-8) 0;
  margin-top: var(--sp-16);
  text-align: center;
  color: var(--clr-text-muted);
  font-size: 0.85rem;
}

.footer a {
  color: var(--clr-text-secondary);
  transition: color var(--t-fast);
}
.footer a:hover { color: var(--clr-primary-light); }

/* ── Responsiveness ──────────────────────────────────────── */
@media (max-width: 768px) {
  .hero-title { font-size: 2rem; }
  .upload-zone { padding: var(--sp-10) var(--sp-5); }
  .share-actions { flex-direction: column; }
  .image-meta-bar { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 480px) {
  :root { --sp-6: 1rem; }
  .toast-container { right: var(--sp-3); left: var(--sp-3); }
  .toast { min-width: unset; max-width: 100%; }
}

/* ── View counter ────────────────────────────────────────── */
.view-counter {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  color: var(--clr-text-secondary);
  font-size: 0.88rem;
}

.view-counter svg { opacity: 0.6; }

/* ── Pulse dot ───────────────────────────────────────────── */
.pulse-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--clr-success);
  display: inline-block;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(34,197,94,.6); }
  50%       { box-shadow: 0 0 0 6px rgba(34,197,94,.0); }
}

/* ── Loading skeleton ────────────────────────────────────── */
.skeleton {
  background: linear-gradient(90deg, var(--clr-surface) 25%, var(--clr-bg-elevated) 50%, var(--clr-surface) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--r-md);
}

@keyframes shimmer {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}