/* =============================================
   C.Link — Main CSS
   Design: Dark premium, Syne + DM Sans
   ============================================= */

:root {
  --bg: #080b14;
  --bg-2: #0d1120;
  --bg-3: #111827;
  --surface: #141c2e;
  --surface-2: #1a2540;
  --border: rgba(255,255,255,0.07);
  --border-2: rgba(255,255,255,0.12);

  --accent: #6366f1;
  --accent-2: #818cf8;
  --accent-glow: rgba(99,102,241,0.35);
  --green: #22c55e;
  --amber: #f59e0b;
  --red: #ef4444;
  --pink: #ec4899;
  --cyan: #06b6d4;

  --text: #f1f5f9;
  --text-2: #94a3b8;
  --text-3: #475569;

  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 20px;
  --shadow: 0 8px 32px rgba(0,0,0,0.4);
  --shadow-sm: 0 2px 12px rgba(0,0,0,0.3);

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

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

html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.6;
  min-height: 100vh;
}

a { color: inherit; text-decoration: none; }
button { cursor: pointer; font-family: inherit; }

/* ─── Grid BG ──────────────────────────────── */
.bg-grid {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image:
    linear-gradient(rgba(99,102,241,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(99,102,241,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
}

/* ─── LANDING NAV ───────────────────────────── */
.landing-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 48px;
  background: rgba(8,11,20,0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.5px;
}

.brand-bolt { font-size: 22px; }

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

.nav-login {
  color: var(--text-2);
  font-size: 14px;
  font-weight: 500;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  transition: color 0.2s;
}
.nav-login:hover { color: var(--text); }

.nav-cta {
  background: var(--accent);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  padding: 8px 20px;
  border-radius: var(--radius-sm);
  transition: background 0.2s, transform 0.15s;
}
.nav-cta:hover { background: var(--accent-2); transform: translateY(-1px); }

/* ─── HERO ──────────────────────────────────── */
.hero {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 120px 24px 80px;
  text-align: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(99,102,241,0.12);
  border: 1px solid rgba(99,102,241,0.3);
  color: var(--accent-2);
  font-size: 13px;
  font-weight: 500;
  padding: 6px 16px;
  border-radius: 100px;
  margin-bottom: 32px;
  animation: fadeDown 0.6s ease;
}

.badge-dot {
  width: 6px; height: 6px;
  background: var(--green);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--green);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(48px, 8vw, 88px);
  font-weight: 800;
  line-height: 1.0;
  letter-spacing: -3px;
  margin-bottom: 24px;
  animation: fadeDown 0.7s ease 0.1s both;
}

.gradient-text {
  background: linear-gradient(135deg, var(--accent) 0%, var(--pink) 60%, var(--amber) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-sub {
  font-size: 18px;
  color: var(--text-2);
  max-width: 520px;
  margin: 0 auto 48px;
  animation: fadeDown 0.7s ease 0.2s both;
}

/* ─── SHORTEN CARD ──────────────────────────── */
.shorten-card {
  width: 100%;
  max-width: 680px;
  background: var(--surface);
  border: 1px solid var(--border-2);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: 0 0 80px rgba(99,102,241,0.08), var(--shadow);
  animation: fadeUp 0.7s ease 0.3s both;
}

.form-tabs {
  display: flex;
  gap: 4px;
  background: var(--bg-3);
  padding: 4px;
  border-radius: var(--radius-sm);
  margin-bottom: 24px;
}

.tab-btn {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 12px;
  border: none;
  background: transparent;
  color: var(--text-2);
  font-size: 13px;
  font-weight: 500;
  border-radius: calc(var(--radius-sm) - 2px);
  transition: all 0.2s;
}

.tab-btn.active {
  background: var(--surface-2);
  color: var(--text);
  box-shadow: var(--shadow-sm);
}

.tab-pane { display: none; }
.tab-pane.active { display: block; }

.input-row { display: flex; flex-direction: column; gap: 10px; }

.url-input {
  width: 100%;
  background: var(--bg-3);
  border: 1px solid var(--border-2);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  color: var(--text);
  font-size: 15px;
  font-family: var(--font-body);
  transition: border-color 0.2s;
}
.url-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}
.url-input::placeholder { color: var(--text-3); }

.slug-wrap {
  display: flex;
  align-items: center;
  background: var(--bg-3);
  border: 1px solid var(--border-2);
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: border-color 0.2s;
}
.slug-wrap:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.slug-prefix {
  padding: 12px 12px 12px 16px;
  color: var(--text-3);
  font-size: 13px;
  white-space: nowrap;
  flex-shrink: 0;
}

.slug-input {
  flex: 1;
  background: transparent;
  border: none;
  padding: 12px 8px;
  color: var(--accent-2);
  font-size: 14px;
  font-weight: 600;
  font-family: var(--font-body);
}
.slug-input:focus { outline: none; }

.slug-status {
  padding: 0 12px;
  font-size: 16px;
}

.options-row {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 12px;
}

.opt-toggle {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text-2);
  cursor: pointer;
}
.opt-toggle input[type="checkbox"] {
  accent-color: var(--accent);
  width: 14px; height: 14px;
}

.extra-fields { margin-top: 10px; }

.opt-input {
  width: 100%;
  background: var(--bg-3);
  border: 1px solid var(--border-2);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 14px;
}
.opt-input:focus { outline: none; border-color: var(--accent); }

/* WhatsApp tab */
.wa-form { display: flex; flex-direction: column; gap: 10px; }
.wa-textarea {
  width: 100%;
  background: var(--bg-3);
  border: 1px solid var(--border-2);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 15px;
  resize: vertical;
}
.wa-textarea:focus { outline: none; border-color: var(--accent); }

.wa-preview {
  background: rgba(37,211,102,0.08);
  border: 1px solid rgba(37,211,102,0.2);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  font-size: 13px;
  display: flex;
  gap: 8px;
  align-items: center;
  overflow: hidden;
}
.preview-label { color: var(--green); font-weight: 600; }
.preview-url { color: var(--text-2); word-break: break-all; }

/* UTM grid */
.utm-form { display: flex; flex-direction: column; gap: 10px; }
.utm-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.utm-input {
  background: var(--bg-3);
  border: 1px solid var(--border-2);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 14px;
  width: 100%;
}
.utm-input:focus { outline: none; border-color: var(--accent); }

/* Turnstile */
.cf-turnstile { margin: 16px 0 0; display: flex; justify-content: center; }

/* Shorten button */
.shorten-btn {
  width: 100%;
  margin-top: 16px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  padding: 14px 24px;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.3px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: background 0.2s, transform 0.15s, box-shadow 0.2s;
}
.shorten-btn:hover {
  background: var(--accent-2);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px var(--accent-glow);
}
.shorten-btn:active { transform: translateY(0); }
.shorten-btn:disabled { opacity: 0.6; pointer-events: none; }

/* ─── RESULT CARD ───────────────────────────── */
.result-card {
  width: 100%;
  max-width: 680px;
  margin-top: 20px;
  background: var(--surface);
  border: 1px solid var(--green);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: 0 0 40px rgba(34,197,94,0.08);
  animation: fadeUp 0.4s ease;
}

.result-inner {
  display: flex;
  gap: 24px;
  align-items: center;
}

.result-left { flex: 1; }
.result-label { font-size: 12px; color: var(--text-3); text-transform: uppercase; letter-spacing: 1px; margin-bottom: 6px; }
.result-url {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 700;
  color: var(--accent-2);
  word-break: break-all;
  margin-bottom: 12px;
}
.result-actions { display: flex; gap: 10px; }

.btn-copy {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  padding: 8px 16px;
  font-size: 13px;
  font-weight: 600;
  transition: background 0.2s;
}
.btn-copy:hover { background: var(--accent-2); }

.btn-test {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--surface-2);
  color: var(--text-2);
  border: 1px solid var(--border-2);
  border-radius: var(--radius-sm);
  padding: 8px 16px;
  font-size: 13px;
  font-weight: 500;
  transition: color 0.2s, border-color 0.2s;
}
.btn-test:hover { color: var(--text); border-color: var(--border-2); }

.result-right { flex-shrink: 0; text-align: center; }
.qr-preview {
  width: 120px; height: 120px;
  border-radius: var(--radius-sm);
  border: 2px solid var(--border-2);
}
.qr-download {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  color: var(--text-3);
  transition: color 0.2s;
}
.qr-download:hover { color: var(--text); }

/* ─── FEATURES ──────────────────────────────── */
.features {
  position: relative;
  z-index: 1;
  padding: 80px 24px;
  max-width: 1100px;
  margin: 0 auto;
}

.feat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
}

.feat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: border-color 0.2s, transform 0.2s;
}
.feat-card:hover {
  border-color: var(--border-2);
  transform: translateY(-3px);
}

.feat-icon { font-size: 32px; margin-bottom: 14px; }
.feat-card h3 {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 8px;
}
.feat-card p { font-size: 14px; color: var(--text-2); line-height: 1.6; }

/* ─── FOOTER ────────────────────────────────── */
.landing-footer {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--border);
  padding: 24px;
  text-align: center;
}
.footer-inner { display: flex; align-items: center; justify-content: center; gap: 16px; }
.footer-brand { font-family: var(--font-display); font-weight: 700; font-size: 15px; }
.footer-by { font-size: 13px; color: var(--text-3); }
.footer-by a { color: var(--accent-2); }
.footer-by a:hover { text-decoration: underline; }

/* ─── AUTH ──────────────────────────────────── */
.login-page, .password-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
}

.auth-wrap {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 420px;
  padding: 24px;
}

.auth-card {
  background: var(--surface);
  border: 1px solid var(--border-2);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow);
  animation: fadeUp 0.5s ease;
}

.auth-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 800;
  margin-bottom: 28px;
  color: var(--text);
}

.auth-title {
  font-family: var(--font-display);
  font-size: 26px;
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 6px;
}

.auth-sub { font-size: 14px; color: var(--text-2); margin-bottom: 28px; }

.auth-error {
  background: rgba(239,68,68,0.1);
  border: 1px solid rgba(239,68,68,0.3);
  color: #fca5a5;
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  font-size: 13px;
  margin-bottom: 16px;
  display: flex;
  gap: 8px;
  align-items: center;
}

.auth-form { display: flex; flex-direction: column; gap: 16px; }

.field-group { display: flex; flex-direction: column; gap: 6px; }
.field-group label { font-size: 13px; font-weight: 500; color: var(--text-2); }
.field-group input {
  background: var(--bg-3);
  border: 1px solid var(--border-2);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 15px;
  transition: border-color 0.2s;
}
.field-group input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.auth-btn {
  width: 100%;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  padding: 13px;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: background 0.2s, transform 0.15s;
  margin-top: 4px;
}
.auth-btn:hover { background: var(--accent-2); transform: translateY(-1px); }

.auth-footer {
  text-align: center;
  margin-top: 20px;
  font-size: 13px;
  color: var(--text-3);
}
.auth-footer a:hover { color: var(--text-2); }

.lock-icon { font-size: 40px; margin-bottom: 16px; }

/* ─── ERROR PAGES ───────────────────────────── */
.error-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
}

.error-wrap {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 40px 24px;
}

.error-code {
  font-family: var(--font-display);
  font-size: 120px;
  font-weight: 800;
  line-height: 1;
  background: linear-gradient(135deg, var(--accent), var(--pink));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 16px;
}

.error-title {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 12px;
}

.error-sub { color: var(--text-2); margin-bottom: 28px; }

.error-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--accent);
  color: #fff;
  padding: 10px 24px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  transition: background 0.2s;
}
.error-btn:hover { background: var(--accent-2); }

/* ─── ANIMATIONS ────────────────────────────── */
@keyframes fadeDown {
  from { opacity: 0; transform: translateY(-16px); }
  to { opacity: 1; transform: translateY(0); }
}

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

/* ─── MOBILE ────────────────────────────────── */
@media (max-width: 640px) {
  .landing-nav { padding: 14px 20px; }
  .hero-title { letter-spacing: -2px; }
  .shorten-card { padding: 20px; }
  .utm-grid { grid-template-columns: 1fr; }
  .result-inner { flex-direction: column; align-items: flex-start; }
  .result-right { align-self: center; }
  .form-tabs .tab-btn span { display: none; }
}