/* ============================================================
   Universal ShortLink — Custom CSS
   Glassmorphism, gradient accents, animations
   ============================================================ */

/* ── Google Fonts ─────────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=Space+Grotesk:wght@400;500;600;700&display=swap');

/* ── CSS Variables ────────────────────────────────────────── */
:root {
  --primary:       #6366f1;
  --primary-dark:  #4f46e5;
  --secondary:     #8b5cf6;
  --accent:        #06b6d4;
  --grad:          linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
  --grad-reverse:  linear-gradient(135deg, #8b5cf6 0%, #6366f1 100%);
  --grad-glow:     0 0 40px rgba(99,102,241,.35);

  /* Dark mode (default) */
  --bg:            #0d0d1a;
  --surface:       #13131f;
  --surface-2:     #1a1a2e;
  --card:          rgba(255,255,255,.04);
  --card-hover:    rgba(255,255,255,.07);
  --border:        rgba(255,255,255,.08);
  --border-hover:  rgba(99,102,241,.4);
  --text:          #e2e8f0;
  --text-muted:    #64748b;
  --text-dim:      #94a3b8;

  --radius-sm:     8px;
  --radius:        12px;
  --radius-lg:     20px;
  --radius-xl:     28px;

  --shadow:        0 4px 24px rgba(0,0,0,.4);
  --shadow-lg:     0 8px 48px rgba(0,0,0,.6);
  --transition:    all .2s cubic-bezier(.4,0,.2,1);
}

/* Light mode */
.light {
  --bg:        #f0f4ff;
  --surface:   #ffffff;
  --surface-2: #f8faff;
  --card:      #ffffff;
  --card-hover:#f0f4ff;
  --border:    rgba(99,102,241,.15);
  --border-hover: rgba(99,102,241,.4);
  --text:      #1e293b;
  --text-muted:#475569;
  --text-dim:  #64748b;
  --shadow:    0 4px 24px rgba(99,102,241,.12);
  --shadow-lg: 0 8px 48px rgba(99,102,241,.2);
}

/* ── Base ─────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  transition: background .3s, color .3s;
}

h1,h2,h3,h4,h5,h6 {
  font-family: 'Space Grotesk', 'Inter', sans-serif;
  font-weight: 700;
  line-height: 1.2;
}

/* ── Gradient Text ────────────────────────────────────────── */
.grad-text {
  background: var(--grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ── Buttons ──────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: .65rem 1.5rem;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: .9rem;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--grad);
  color: #fff;
  box-shadow: 0 4px 20px rgba(99,102,241,.35);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(99,102,241,.5);
}

.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 1.5px solid var(--primary);
}
.btn-outline:hover {
  background: var(--primary);
  color: #fff;
  transform: translateY(-2px);
}

.btn-ghost {
  background: var(--card);
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-ghost:hover {
  background: var(--card-hover);
  border-color: var(--border-hover);
}

.btn-lg { padding: .9rem 2rem; font-size: 1rem; border-radius: var(--radius-lg); }
.btn-sm { padding: .4rem .9rem; font-size: .8rem; border-radius: var(--radius-sm); }

/* ── Cards ────────────────────────────────────────────────── */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: var(--transition);
}
.card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow);
}

.glass {
  background: rgba(255,255,255,.05);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255,255,255,.1);
}
.light .glass {
  background: rgba(255,255,255,.7);
  border: 1px solid rgba(99,102,241,.15);
}

/* ── Inputs ───────────────────────────────────────────────── */
.input {
  width: 100%;
  padding: .75rem 1rem;
  background: var(--card);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: .95rem;
  font-family: inherit;
  outline: none;
  transition: var(--transition);
}
.input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(99,102,241,.15);
}
.input::placeholder { color: var(--text-muted); }

/* ── Navbar ───────────────────────────────────────────────── */
#navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(13,13,26,.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}
.light #navbar {
  background: rgba(255,255,255,.85);
  border-bottom: 1px solid rgba(99,102,241,.1);
}

.nav-link {
  color: var(--text-dim);
  text-decoration: none;
  font-size: .875rem;
  font-weight: 500;
  padding: .45rem 1rem;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  letter-spacing: .01em;
}
.nav-link:hover {
  color: #c7d2fe;
  background: rgba(99,102,241,.1);
}
.nav-link.active {
  color: #a5b4fc;
  background: rgba(99,102,241,.12);
  font-weight: 600;
}

/* ── Hero ─────────────────────────────────────────────────── */
.hero-bg {
  background: radial-gradient(ellipse 80% 60% at 50% -20%,
    rgba(99,102,241,.25) 0%, transparent 70%);
}

/* ── Shortener Card ───────────────────────────────────────── */
.shortener-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 2rem;
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow-lg);
}

.result-card {
  background: linear-gradient(135deg,
    rgba(99,102,241,.1) 0%,
    rgba(139,92,246,.08) 100%);
  border: 1px solid rgba(99,102,241,.25);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  animation: slideUp .4s cubic-bezier(.34,1.56,.64,1);
}

/* ── Stat Cards ───────────────────────────────────────────── */
.stat-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  text-align: center;
  transition: var(--transition);
}
.stat-card:hover {
  border-color: rgba(99,102,241,.4);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(99,102,241,.15);
}
.stat-number {
  font-size: 2.5rem;
  font-weight: 800;
  font-family: 'Space Grotesk', sans-serif;
  background: var(--grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
}

/* ── Feature Cards ────────────────────────────────────────── */
.feature-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  transition: var(--transition);
}
.feature-card:hover {
  border-color: rgba(99,102,241,.4);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(99,102,241,.12);
}
.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(99,102,241,.2), rgba(139,92,246,.2));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

/* ── FAQ ──────────────────────────────────────────────────── */
.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
}
.faq-item.open { border-color: rgba(99,102,241,.3); }
.faq-q {
  width: 100%;
  text-align: left;
  padding: 1.1rem 1.25rem;
  background: var(--card);
  border: none;
  color: var(--text);
  font-weight: 600;
  font-size: .95rem;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: inherit;
  transition: var(--transition);
}
.faq-q:hover { background: var(--card-hover); }
.faq-arrow { transition: transform .3s; font-size: .75rem; color: var(--primary); }
.faq-item.open .faq-arrow { transform: rotate(180deg); }
.faq-a {
  padding: 0 1.25rem;
  max-height: 0;
  overflow: hidden;
  transition: max-height .35s ease, padding .35s ease;
  color: var(--text-dim);
  font-size: .9rem;
  line-height: 1.7;
  background: var(--card);
}
.faq-item.open .faq-a { max-height: 300px; padding: .75rem 1.25rem 1.25rem; }

/* ── Toast notifications ──────────────────────────────────── */
#toast-container {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: .5rem;
}
.toast {
  min-width: 280px;
  max-width: 360px;
  padding: .9rem 1.25rem;
  border-radius: var(--radius);
  font-size: .875rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: .75rem;
  box-shadow: var(--shadow-lg);
  animation: slideUp .3s ease;
}
.toast-success { background: #14532d; border: 1px solid #16a34a; color: #86efac; }
.toast-error   { background: #450a0a; border: 1px solid #dc2626; color: #fca5a5; }
.toast-info    { background: #1e1b4b; border: 1px solid #6366f1; color: #a5b4fc; }

/* ── Loading spinner ──────────────────────────────────────── */
.spinner {
  width: 20px;
  height: 20px;
  border: 2.5px solid rgba(255,255,255,.2);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin .6s linear infinite;
  display: inline-block;
}

/* ── Badges ───────────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  padding: .25rem .75rem;
  border-radius: 999px;
  font-size: .75rem;
  font-weight: 600;
}
.badge-primary { background: rgba(99,102,241,.15); color: #a5b4fc; border: 1px solid rgba(99,102,241,.3); }
.badge-success { background: rgba(34,197,94,.12);  color: #86efac; border: 1px solid rgba(34,197,94,.25); }
.badge-danger  { background: rgba(239,68,68,.12);  color: #fca5a5; border: 1px solid rgba(239,68,68,.25); }
.badge-warning { background: rgba(234,179,8,.12);  color: #fde047; border: 1px solid rgba(234,179,8,.25); }

/* ── Tables ───────────────────────────────────────────────── */
.tbl { width: 100%; border-collapse: collapse; font-size: .875rem; }
.tbl th {
  text-align: left;
  padding: .75rem 1rem;
  color: var(--text-muted);
  font-weight: 500;
  font-size: .8rem;
  text-transform: uppercase;
  letter-spacing: .05em;
  border-bottom: 1px solid var(--border);
}
.tbl td {
  padding: .85rem 1rem;
  border-bottom: 1px solid var(--border);
  color: var(--text);
  vertical-align: middle;
}
.tbl tr:last-child td { border-bottom: none; }
.tbl tr:hover td { background: var(--card-hover); }

/* ── Footer ───────────────────────────────────────────────── */
footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
}

/* ── Scrollbar ────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(99,102,241,.3); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(99,102,241,.6); }

/* ── Animations ───────────────────────────────────────────── */
@keyframes slideUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}
@keyframes spin {
  to { transform: rotate(360deg); }
}
@keyframes pulse-glow {
  0%,100% { box-shadow: 0 0 20px rgba(99,102,241,.3); }
  50%     { box-shadow: 0 0 40px rgba(99,102,241,.6); }
}
@keyframes float {
  0%,100% { transform: translateY(0); }
  50%     { transform: translateY(-8px); }
}
@keyframes countUp { from { opacity:0 } to { opacity:1 } }

.fade-in   { animation: fadeIn .5s ease; }
.slide-up  { animation: slideUp .5s cubic-bezier(.34,1.56,.64,1); }
.float     { animation: float 4s ease-in-out infinite; }
.pulse-glow { animation: pulse-glow 2s ease-in-out infinite; }

/* ── Responsive ───────────────────────────────────────────── */
@media (max-width: 768px) {
  .shortener-card { padding: 1.25rem; }
  .stat-number { font-size: 2rem; }
  .hide-mobile { display: none !important; }
}

/* ── Utility ──────────────────────────────────────────────── */
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.sr-only  { position: absolute; width:1px; height:1px; overflow:hidden; clip:rect(0,0,0,0); }
.divider  { height: 1px; background: var(--border); margin: 2rem 0; }