/* ===== BASE ===== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
:root {
  --bg: #0a0a0a; --card: #1a1a2e; --text: #e0e0e0; --text-dim: #888;
  --accent: #e94560; --accent-glow: rgba(233,69,96,0.3);
  --border: rgba(255,255,255,0.06); --radius: 12px;
  --shadow: 0 4px 20px rgba(0,0,0,0.4);
}
body { font-family: 'Inter', -apple-system, sans-serif; background: var(--bg); color: var(--text); min-height: 100vh; line-height: 1.6; }
a { color: var(--accent); text-decoration: none; }
input, select, textarea { font-family: inherit; font-size: inherit; }

/* ===== BUTTONS ===== */
.btn { display: inline-flex; align-items: center; gap: 0.5rem; padding: 0.65rem 1.4rem; border-radius: 8px; font-weight: 600; font-size: 0.9rem; border: none; cursor: pointer; transition: all .2s; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { filter: brightness(1.15); transform: translateY(-1px); box-shadow: 0 4px 15px var(--accent-glow); }
.btn-ghost { background: transparent; color: var(--text); border: 1px solid var(--border); }
.btn-ghost:hover { background: rgba(255,255,255,0.05); }
.btn-sm { padding: 0.4rem 0.8rem; font-size: 0.8rem; }
.btn-full { width: 100%; justify-content: center; }
.btn-lg { padding: 0.9rem 2rem; font-size: 1.05rem; }
.btn-danger { background: #ff4757; color: #fff; }
.btn-danger:hover { background: #ff6b81; }

/* ===== LANDING ===== */
.landing { min-height: 100vh; overflow: hidden; position: relative; }
.landing-glow { position: absolute; top: -200px; left: 50%; transform: translateX(-50%); width: 600px; height: 600px; background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%); pointer-events: none; }
.landing-nav { display: flex; justify-content: space-between; align-items: center; padding: 1.5rem 3rem; position: relative; z-index: 1; }
.logo, .sidebar-logo { font-size: 1.4rem; font-weight: 700; color: var(--text); display: flex; align-items: center; gap: 0.5rem; }
.logo i, .sidebar-logo i { color: var(--accent); }
.nav-actions { display: flex; gap: 0.75rem; }
.landing-hero { display: flex; flex-direction: column; align-items: center; text-align: center; padding: 6rem 2rem 4rem; position: relative; z-index: 1; }
.landing-hero h1 { font-size: clamp(2.2rem, 5vw, 3.8rem); font-weight: 800; line-height: 1.15; margin-bottom: 1.2rem; }
.gradient-text { background: linear-gradient(135deg, var(--accent), #a855f7, #6366f1); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero-sub { font-size: 1.15rem; color: var(--text-dim); max-width: 500px; margin-bottom: 2.5rem; }
.hero-preview { margin-top: 3rem; }
.phone-mockup { width: 280px; height: 520px; background: var(--card); border-radius: 32px; border: 2px solid var(--border); padding: 1.5rem; display: flex; flex-direction: column; align-items: center; box-shadow: var(--shadow); overflow: hidden; }
.phone-screen { width: 100%; display: flex; flex-direction: column; align-items: center; gap: 0.8rem; padding-top: 2rem; }
.mock-avatar { width: 60px; height: 60px; border-radius: 50%; background: linear-gradient(135deg, var(--accent), #a855f7); }
.mock-name { font-size: 0.85rem; color: var(--text-dim); margin-bottom: 0.5rem; }
.mock-link { width: 100%; height: 40px; background: rgba(255,255,255,0.05); border-radius: 8px; animation: pulse 2s infinite; }
.mock-link:nth-child(4) { animation-delay: 0.3s; }
.mock-link:nth-child(5) { animation-delay: 0.6s; }
.mock-link:nth-child(6) { animation-delay: 0.9s; }
@keyframes pulse { 0%,100% { opacity: 0.5; } 50% { opacity: 0.8; } }

/* ===== AUTH ===== */
.auth-page { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 2rem; background: linear-gradient(135deg, var(--bg), var(--card)); }
.auth-card { background: var(--card); border: 1px solid var(--border); border-radius: 16px; padding: 2.5rem; width: 100%; max-width: 420px; box-shadow: var(--shadow); }
.auth-card h2 { font-size: 1.5rem; margin: 1.2rem 0; }
.logo-sm { font-size: 1.1rem; font-weight: 700; color: var(--text); display: flex; align-items: center; gap: 0.5rem; }
.logo-sm i { color: var(--accent); }
.form-group { margin-bottom: 1rem; }
.form-group label { display: block; font-size: 0.85rem; font-weight: 500; margin-bottom: 0.3rem; color: var(--text-dim); }
.form-group input, .form-group textarea, .form-group select {
  width: 100%; padding: 0.7rem 1rem; background: rgba(255,255,255,0.05); border: 1px solid var(--border);
  border-radius: 8px; color: var(--text); font-size: 0.95rem; transition: border .2s;
}
.form-group input:focus, .form-group textarea:focus { outline: none; border-color: var(--accent); }
.form-error { color: #ff4757; font-size: 0.85rem; margin-bottom: 0.75rem; min-height: 1.2em; }
.auth-switch { text-align: center; margin-top: 1.5rem; font-size: 0.9rem; color: var(--text-dim); }

/* ===== DASHBOARD ===== */
.dashboard-layout { display: grid; grid-template-columns: 240px 1fr 320px; min-height: 100vh; }
.sidebar { background: var(--card); border-right: 1px solid var(--border); display: flex; flex-direction: column; padding: 1.5rem 0; position: sticky; top: 0; height: 100vh; }
.sidebar-logo { padding: 0 1.5rem; margin-bottom: 2rem; }
.sidebar-nav { flex: 1; display: flex; flex-direction: column; gap: 0.2rem; }
.nav-item { display: flex; align-items: center; gap: 0.75rem; padding: 0.7rem 1.5rem; color: var(--text-dim); font-size: 0.9rem; font-weight: 500; transition: all .15s; }
.nav-item:hover { color: var(--text); background: rgba(255,255,255,0.03); }
.nav-item.active { color: var(--accent); background: rgba(233,69,96,0.08); border-right: 3px solid var(--accent); }
.nav-item i { width: 20px; text-align: center; }
.sidebar-bottom { border-top: 1px solid var(--border); padding-top: 0.5rem; }
.dash-main { padding: 2rem 2.5rem; overflow-y: auto; }
.dash-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 2rem; }
.dash-header h1 { font-size: 1.6rem; font-weight: 700; }

/* Preview panel */
.preview-panel { background: rgba(0,0,0,0.3); border-left: 1px solid var(--border); display: flex; align-items: flex-start; justify-content: center; padding: 2rem 1rem; position: sticky; top: 0; height: 100vh; overflow: hidden; }
.preview-frame .phone-mockup { width: 260px; height: 500px; position: relative; }
.preview-frame .phone-mockup iframe { width: 100%; height: 100%; border: none; border-radius: 28px; }

/* Link cards */
.link-list { display: flex; flex-direction: column; gap: 0.75rem; }
.link-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 1rem 1.25rem; display: flex; align-items: center; gap: 1rem; transition: all .2s; cursor: grab; }
.link-card:hover { border-color: rgba(255,255,255,0.12); }
.link-card .drag-handle { color: var(--text-dim); cursor: grab; font-size: 1.1rem; }
.link-card .link-info { flex: 1; min-width: 0; }
.link-card .link-title { font-weight: 600; font-size: 0.95rem; }
.link-card .link-url { font-size: 0.8rem; color: var(--text-dim); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.link-card .link-clicks { font-size: 0.8rem; color: var(--text-dim); white-space: nowrap; }
.link-card .link-actions { display: flex; gap: 0.5rem; }
.link-card .link-actions button { background: none; border: none; color: var(--text-dim); cursor: pointer; padding: 0.3rem; font-size: 0.9rem; transition: color .15s; }
.link-card .link-actions button:hover { color: var(--text); }
.link-card .link-actions button.delete:hover { color: #ff4757; }

/* Empty state */
.empty-state { text-align: center; padding: 4rem 2rem; color: var(--text-dim); }
.empty-state i { font-size: 3rem; margin-bottom: 1rem; opacity: 0.3; }
.empty-state h3 { font-size: 1.2rem; margin-bottom: 0.5rem; color: var(--text); }

/* Appearance */
.theme-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 1rem; margin-top: 1rem; }
.theme-card { border-radius: var(--radius); padding: 1.25rem; cursor: pointer; border: 2px solid var(--border); transition: all .2s; text-align: center; font-size: 0.85rem; font-weight: 600; }
.theme-card:hover { transform: translateY(-2px); }
.theme-card.active { border-color: var(--accent); box-shadow: 0 0 20px var(--accent-glow); }

/* Template grid */
.template-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 1rem; margin-top: 0.5rem; }
.template-card { border-radius: var(--radius); cursor: pointer; border: 2px solid var(--border); transition: all .2s; overflow: hidden; background: var(--card); }
.template-card:hover { transform: translateY(-2px); border-color: rgba(255,255,255,0.15); }
.template-card.active { border-color: var(--accent); box-shadow: 0 0 20px var(--accent-glow); }
.template-preview { min-height: 120px; display: flex; flex-direction: column; justify-content: center; }
.template-label { font-size: 0.85rem; font-weight: 600; padding: 0.6rem 0.75rem 0.1rem; }
.template-desc { font-size: 0.72rem; color: var(--text-dim); padding: 0.1rem 0.75rem 0.6rem; }

/* Profile section */
.profile-section { max-width: 500px; }
.profile-section .avatar-upload { display: flex; align-items: center; gap: 1.5rem; margin-bottom: 1.5rem; }
.profile-section .current-avatar { width: 80px; height: 80px; border-radius: 50%; object-fit: cover; border: 2px solid var(--border); }
.profile-section .avatar-placeholder-sm { width: 80px; height: 80px; border-radius: 50%; background: rgba(255,255,255,0.05); display: flex; align-items: center; justify-content: center; font-size: 1.5rem; color: var(--text-dim); border: 2px solid var(--border); }

/* Analytics */
.stat-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 1rem; margin-bottom: 2rem; }
.stat-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.5rem; }
.stat-card .stat-value { font-size: 2rem; font-weight: 700; color: var(--accent); }
.stat-card .stat-label { font-size: 0.85rem; color: var(--text-dim); margin-top: 0.3rem; }
.analytics-list { display: flex; flex-direction: column; gap: 0.5rem; }
.analytics-row { display: flex; align-items: center; gap: 1rem; padding: 0.75rem 1rem; background: var(--card); border-radius: 8px; border: 1px solid var(--border); }
.analytics-row .bar-wrap { flex: 1; height: 6px; background: rgba(255,255,255,0.05); border-radius: 3px; overflow: hidden; }
.analytics-row .bar { height: 100%; background: var(--accent); border-radius: 3px; transition: width .5s ease; }
.analytics-row .click-count { font-weight: 600; font-size: 0.9rem; min-width: 50px; text-align: right; }
.analytics-row .link-name { font-size: 0.9rem; min-width: 120px; }

/* Modal */
.modal { position: fixed; inset: 0; z-index: 1000; display: flex; align-items: center; justify-content: center; }
.modal.hidden { display: none; }
.modal-overlay { position: absolute; inset: 0; background: rgba(0,0,0,0.6); backdrop-filter: blur(4px); }
.modal-content { position: relative; background: var(--card); border: 1px solid var(--border); border-radius: 16px; padding: 2rem; width: 90%; max-width: 460px; box-shadow: var(--shadow); }
.modal-content h3 { font-size: 1.2rem; margin-bottom: 1.5rem; }
.modal-actions { display: flex; gap: 0.75rem; justify-content: flex-end; margin-top: 1.5rem; }

/* 404 */
.error-page { min-height: 100vh; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 1rem; }
.error-page h1 { font-size: 5rem; font-weight: 800; color: var(--accent); }

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .dashboard-layout { grid-template-columns: 1fr; }
  .sidebar { position: fixed; left: -260px; z-index: 100; width: 260px; transition: left .3s; }
  .sidebar.open { left: 0; }
  .preview-panel { display: none; }
  .dash-main { padding: 1.5rem; }
  .dash-header { flex-wrap: wrap; gap: 1rem; }
}
@media (max-width: 640px) {
  .landing-nav { padding: 1rem 1.5rem; }
  .landing-hero { padding: 3rem 1.5rem 2rem; }
  .auth-card { padding: 1.5rem; }
  .theme-grid { grid-template-columns: repeat(2, 1fr); }
  .template-grid { grid-template-columns: repeat(2, 1fr); }
}

/* Drag & drop */
.link-card.dragging { opacity: 0.5; }
.link-card.drag-over { border-top: 2px solid var(--accent); }

/* Toast */
.toast { position: fixed; bottom: 2rem; right: 2rem; background: var(--card); border: 1px solid var(--border); padding: 0.75rem 1.25rem; border-radius: 8px; font-size: 0.9rem; z-index: 2000; animation: slideIn .3s ease; box-shadow: var(--shadow); }
@keyframes slideIn { from { transform: translateY(20px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }

/* Hamburger */
.hamburger { display: none; position: fixed; top: 1rem; left: 1rem; z-index: 200; background: var(--card); border: 1px solid var(--border); border-radius: 8px; padding: 0.6rem 0.8rem; color: var(--text); font-size: 1.2rem; cursor: pointer; }
.sidebar-overlay { display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.5); z-index: 99; }
.mobile-topbar { display: none; position: fixed; top: 0; left: 0; right: 0; z-index: 50; background: var(--card); border-bottom: 1px solid var(--border); padding: 0.75rem 1rem 0.75rem 3.5rem; justify-content: space-between; align-items: center; }
.mobile-actions { display: flex; gap: 0.5rem; }
@media (max-width: 1024px) {
  .hamburger { display: block; }
  .sidebar-overlay.open { display: block; }
  .mobile-topbar { display: flex; }
  .dash-main { padding-top: 5.5rem !important; padding-left: 1rem !important; padding-right: 1rem !important; }
  .dash-header { margin-top: 0.5rem; }
}