/* ============================================================
   LinkShield — Main Stylesheet
   ============================================================ */

:root {
  --bg-deep: #060A12;
  --bg-card: #0D1420;
  --bg-surface: #111B2E;
  --bg-elevated: #162338;
  --cyan: #00D4FF;
  --cyan-dim: #0099BB;
  --cyan-glow: rgba(0,212,255,0.15);
  --magenta: #FF2D78;
  --magenta-glow: rgba(255,45,120,0.15);
  --gold: #FFB800;
  --text-primary: #E8EDF5;
  --text-secondary: #7A8BA0;
  --text-muted: #3D5070;
  --border: rgba(0,212,255,0.12);
  --border-hover: rgba(0,212,255,0.35);
  --radius: 12px;
  --radius-sm: 8px;
}

* { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior:smooth; }

body {
  background: var(--bg-deep);
  color: var(--text-primary);
  font-family: 'Inter', sans-serif;
  min-height: 100vh;
  overflow-x: hidden;
}

body::before {
  content:'';
  position:fixed;
  inset:0;
  background-image:
    linear-gradient(rgba(0,212,255,0.03) 1px,transparent 1px),
    linear-gradient(90deg,rgba(0,212,255,0.03) 1px,transparent 1px);
  background-size:48px 48px;
  pointer-events:none;
  z-index:0;
}

/* NAV */
nav {
  position:fixed;top:0;left:0;right:0;z-index:100;
  padding:16px 40px;
  display:flex;align-items:center;justify-content:space-between;
  background:rgba(6,10,18,0.85);
  backdrop-filter:blur(16px);
  border-bottom:1px solid var(--border);
}
.logo { display:flex;align-items:center;gap:10px;font-family:'Space Grotesk',sans-serif;font-size:20px;font-weight:700;color:var(--text-primary);text-decoration:none; }
.logo-icon { width:32px;height:32px;background:linear-gradient(135deg,var(--cyan),var(--magenta));border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:14px; }
.logo span { color:var(--cyan); }
.nav-links { display:flex;align-items:center;gap:8px; }
.nav-links a { color:var(--text-secondary);text-decoration:none;font-size:14px;font-weight:500;padding:8px 14px;border-radius:var(--radius-sm);transition:all .2s; }
.nav-links a:hover { color:var(--text-primary);background:var(--bg-surface); }
.nav-admin { color:var(--gold) !important; }
.nav-cta { background:var(--cyan)!important;color:var(--bg-deep)!important;font-weight:600!important; }
.nav-cta:hover { background:#00BBDD!important;transform:translateY(-1px); }

/* HERO */
.hero { position:relative;z-index:1;padding:140px 40px 80px;text-align:center;max-width:900px;margin:0 auto; }
.hero-badge { display:inline-flex;align-items:center;gap:6px;background:rgba(0,212,255,0.08);border:1px solid rgba(0,212,255,0.2);color:var(--cyan);font-size:12px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;padding:6px 14px;border-radius:100px;margin-bottom:32px; }
.hero-badge-dot { width:6px;height:6px;background:var(--cyan);border-radius:50%;animation:pulse 2s ease-in-out infinite; }
@keyframes pulse { 0%,100%{opacity:1;transform:scale(1)} 50%{opacity:.4;transform:scale(.8)} }
.hero h1 { font-family:'Space Grotesk',sans-serif;font-size:clamp(42px,6vw,72px);font-weight:700;line-height:1.05;letter-spacing:-.02em;margin-bottom:24px; }
.hero h1 em { font-style:normal;background:linear-gradient(135deg,var(--cyan) 0%,var(--magenta) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text; }
.hero p { font-size:18px;color:var(--text-secondary);line-height:1.65;max-width:580px;margin:0 auto 48px; }
.tunnel-wrap { margin:0 auto 60px;max-width:600px; }
#tunnelCanvas { width:100%;height:80px;display:block; }

/* CARD */
.app-section { position:relative;z-index:1;max-width:820px;margin:0 auto;padding:0 24px 80px; }
.card { background:var(--bg-card);border:1px solid var(--border);border-radius:20px;overflow:hidden;box-shadow:0 0 60px rgba(0,212,255,.05),0 32px 80px rgba(0,0,0,.4); }

/* TABS */
.tabs { display:flex;background:var(--bg-deep);border-bottom:1px solid var(--border);padding:0 4px; }
.tab-btn { flex:1;padding:18px 16px;background:none;border:none;color:var(--text-muted);font-family:'Space Grotesk',sans-serif;font-size:13px;font-weight:600;letter-spacing:.04em;text-transform:uppercase;cursor:pointer;position:relative;transition:color .2s;display:flex;align-items:center;justify-content:center;gap:8px; }
.tab-btn.active { color:var(--cyan); }
.tab-btn.active::after { content:'';position:absolute;bottom:0;left:0;right:0;height:2px;background:var(--cyan);border-radius:2px 2px 0 0; }
.tab-btn:hover:not(.active) { color:var(--text-secondary); }

/* PANEL */
.panel { display:none;padding:40px; }
.panel.active { display:block; }

/* FORM */
.form-group { margin-bottom:24px; }
label { display:block;font-size:12px;font-weight:600;letter-spacing:.06em;text-transform:uppercase;color:var(--text-secondary);margin-bottom:10px; }
.label-row { display:flex;align-items:center;justify-content:space-between;margin-bottom:10px; }
.label-tag { font-size:10px;font-weight:600;letter-spacing:.06em;text-transform:uppercase;padding:3px 8px;border-radius:4px;background:rgba(0,212,255,0.1);color:var(--cyan);border:1px solid rgba(0,212,255,0.2); }
.label-tag.shadow { background:rgba(255,45,120,0.1);color:var(--magenta);border-color:rgba(255,45,120,0.2); }
.label-tag.gold { background:rgba(255,184,0,0.1);color:var(--gold);border-color:rgba(255,184,0,0.2); }

input[type="text"],input[type="url"],input[type="password"],select {
  width:100%;background:var(--bg-surface);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text-primary);font-family:'JetBrains Mono',monospace;font-size:13px;padding:14px 16px;outline:none;transition:border-color .2s,box-shadow .2s;
}
input:focus,select:focus { border-color:var(--cyan);box-shadow:0 0 0 3px var(--cyan-glow); }
select { appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%237A8BA0' d='M6 8L1 3h10z'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 14px center;cursor:pointer; }
select option { background:var(--bg-surface); }

/* CHAIN */
.redirect-chain { display:flex;flex-direction:column;gap:12px; }
.step-badge { width:32px;height:32px;background:var(--bg-elevated);border:1px solid var(--border);border-radius:50%;display:flex;align-items:center;justify-content:center;font-family:'JetBrains Mono',monospace;font-size:11px;color:var(--text-secondary);flex-shrink:0; }
.step-badge.start { border-color:rgba(0,212,255,.4);color:var(--cyan); }
.connector-line { width:1px;height:20px;background:linear-gradient(to bottom,var(--cyan-dim),transparent);margin-left:15px; }

/* TOGGLE */
.toggle-row { display:flex;align-items:center;justify-content:space-between;padding:16px;background:var(--bg-surface);border:1px solid var(--border);border-radius:var(--radius-sm);cursor:pointer;transition:border-color .2s; }
.toggle-row:hover { border-color:var(--border-hover); }
.toggle-info { flex:1;margin-right:16px; }
.toggle-title { font-size:14px;font-weight:600;color:var(--text-primary);margin-bottom:4px; }
.toggle-desc { font-size:12px;color:var(--text-muted);line-height:1.4; }
.toggle-switch { position:relative;width:44px;height:24px;flex-shrink:0; }
.toggle-switch input { display:none; }
.toggle-track { position:absolute;inset:0;background:var(--bg-elevated);border:1px solid var(--border);border-radius:12px;transition:all .3s;cursor:pointer; }
.toggle-track::after { content:'';position:absolute;top:3px;left:3px;width:16px;height:16px;background:var(--text-muted);border-radius:50%;transition:all .3s; }
.toggle-switch input:checked + .toggle-track { background:rgba(255,45,120,.2);border-color:var(--magenta); }
.toggle-switch input:checked + .toggle-track::after { background:var(--magenta);transform:translateX(20px);box-shadow:0 0 8px var(--magenta); }

/* SHADOW OPTIONS */
.shadow-options { margin-top:16px;padding:20px;background:rgba(255,45,120,.04);border:1px solid rgba(255,45,120,.15);border-radius:var(--radius-sm);display:none; }
.shadow-options.visible { display:block; }
.shadow-grid { display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:12px; }
.shadow-opt { padding:12px;background:var(--bg-surface);border:1px solid var(--border);border-radius:var(--radius-sm);cursor:pointer;transition:all .2s;text-align:center; }
.shadow-opt:hover { border-color:rgba(255,45,120,.3); }
.shadow-opt.selected { border-color:var(--magenta);background:rgba(255,45,120,.08); }
.shadow-opt-icon { font-size:20px;margin-bottom:6px; }
.shadow-opt-title { font-size:12px;font-weight:600;color:var(--text-primary);margin-bottom:3px; }
.shadow-opt-desc { font-size:10px;color:var(--text-muted);line-height:1.4; }

/* DIVIDER */
.divider { height:1px;background:var(--border);margin:32px 0; }

/* BUTTONS */
.btn { display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:14px 28px;border-radius:var(--radius-sm);font-family:'Space Grotesk',sans-serif;font-size:14px;font-weight:600;cursor:pointer;border:none;transition:all .2s;text-decoration:none; }
.btn-primary { background:linear-gradient(135deg,var(--cyan) 0%,#0099CC 100%);color:var(--bg-deep);width:100%;padding:16px;font-size:15px;box-shadow:0 4px 24px rgba(0,212,255,.25); }
.btn-primary:hover { transform:translateY(-2px);box-shadow:0 8px 32px rgba(0,212,255,.4); }
.btn-primary:disabled { opacity:.6;pointer-events:none; }
.btn-secondary { background:var(--bg-surface);color:var(--text-secondary);border:1px solid var(--border); }
.btn-secondary:hover { color:var(--text-primary);border-color:var(--border-hover); }
.btn-ghost { background:none;color:var(--text-secondary);border:1px solid var(--border);padding:8px 14px;font-size:12px; }
.btn-ghost:hover { color:var(--cyan);border-color:rgba(0,212,255,.3); }
.btn-danger { background:rgba(255,45,120,.1);color:var(--magenta);border:1px solid rgba(255,45,120,.2);padding:8px 14px;font-size:12px; }
.btn-danger:hover { background:rgba(255,45,120,.2); }

/* RESULT */
.result-box { display:none;margin-top:28px;padding:24px;background:rgba(0,212,255,.04);border:1px solid rgba(0,212,255,.2);border-radius:var(--radius);animation:slideIn .4s ease; }
.result-box.visible { display:block; }
@keyframes slideIn { from{opacity:0;transform:translateY(10px)} to{opacity:1;transform:translateY(0)} }
.result-header { display:flex;align-items:center;gap:10px;margin-bottom:16px; }
.result-icon { width:36px;height:36px;background:rgba(0,212,255,.1);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:16px; }
.result-title { font-family:'Space Grotesk',sans-serif;font-size:15px;font-weight:600; }
.result-subtitle { font-size:12px;color:var(--text-muted);margin-top:2px; }
.result-url-row { display:flex;align-items:center;gap:10px;background:var(--bg-deep);border:1px solid var(--border);border-radius:var(--radius-sm);padding:12px 16px;margin-bottom:16px; }
.result-url { flex:1;font-family:'JetBrains Mono',monospace;font-size:13px;color:var(--cyan);word-break:break-all; }
.result-meta { display:flex;gap:8px;flex-wrap:wrap; }
.meta-tag { font-size:11px;font-weight:500;padding:4px 10px;border-radius:4px;display:flex;align-items:center;gap:5px; }
.meta-tag.hops { background:rgba(0,212,255,.08);color:var(--cyan);border:1px solid rgba(0,212,255,.15); }
.meta-tag.shadow { background:rgba(255,45,120,.08);color:var(--magenta);border:1px solid rgba(255,45,120,.15); }
.meta-tag.created { background:rgba(122,139,160,.08);color:var(--text-secondary);border:1px solid var(--border); }

/* LINKS */
.links-header { display:flex;align-items:center;justify-content:space-between;margin-bottom:24px; }
.links-title { font-family:'Space Grotesk',sans-serif;font-size:18px;font-weight:600; }
.links-count { font-size:12px;color:var(--text-muted);margin-top:2px; }
.links-empty { text-align:center;padding:60px 20px;color:var(--text-muted); }
.links-empty-icon { font-size:40px;margin-bottom:16px; }
.links-empty-text { font-size:14px; }
.link-item { background:var(--bg-surface);border:1px solid var(--border);border-radius:var(--radius-sm);padding:16px;margin-bottom:10px;transition:border-color .2s;animation:slideIn .3s ease; }
.link-item:hover { border-color:var(--border-hover); }
.link-item-top { display:flex;align-items:flex-start;justify-content:space-between;gap:12px;margin-bottom:10px; }
.link-short { font-family:'JetBrains Mono',monospace;font-size:14px;font-weight:500;color:var(--cyan);text-decoration:none;cursor:pointer; }
.link-short:hover { text-decoration:underline; }
.link-dest { font-size:12px;color:var(--text-muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:300px;margin-top:4px; }
.link-actions { display:flex;gap:6px;flex-shrink:0; }
.link-item-bottom { display:flex;align-items:center;gap:8px;flex-wrap:wrap; }
.clicks-badge { font-size:11px;color:var(--text-muted);display:flex;align-items:center;gap:4px; }

/* STATS */
.stats-grid { display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-bottom:28px; }
.stat-card { background:var(--bg-surface);border:1px solid var(--border);border-radius:var(--radius-sm);padding:20px;text-align:center; }
.stat-value { font-family:'Space Grotesk',sans-serif;font-size:32px;font-weight:700;margin-bottom:6px; }
.stat-label { font-size:11px;font-weight:600;letter-spacing:.06em;text-transform:uppercase;color:var(--text-muted); }

/* FEATURES */
.features { position:relative;z-index:1;max-width:1000px;margin:0 auto;padding:0 24px 100px; }
.features-title { font-family:'Space Grotesk',sans-serif;font-size:32px;font-weight:700;text-align:center;margin-bottom:48px;letter-spacing:-.02em; }
.features-grid { display:grid;grid-template-columns:repeat(3,1fr);gap:20px; }
.feature-card { background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:28px;transition:border-color .2s,transform .2s; }
.feature-card:hover { border-color:var(--border-hover);transform:translateY(-4px); }
.feature-icon { width:48px;height:48px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:22px;margin-bottom:16px; }
.icon-cyan { background:rgba(0,212,255,.1);border:1px solid rgba(0,212,255,.2); }
.icon-magenta { background:rgba(255,45,120,.1);border:1px solid rgba(255,45,120,.2); }
.icon-gold { background:rgba(255,184,0,.1);border:1px solid rgba(255,184,0,.2); }
.feature-title { font-family:'Space Grotesk',sans-serif;font-size:16px;font-weight:600;margin-bottom:10px; }
.feature-desc { font-size:13px;color:var(--text-secondary);line-height:1.6; }

/* TOAST */
.toast { position:fixed;bottom:32px;right:32px;background:var(--bg-elevated);border:1px solid rgba(0,212,255,.25);border-radius:var(--radius-sm);padding:14px 20px;font-size:13px;color:var(--text-primary);z-index:999;display:flex;align-items:center;gap:10px;box-shadow:0 8px 32px rgba(0,0,0,.5);transform:translateY(100px);opacity:0;transition:all .3s cubic-bezier(.175,.885,.32,1.275); }
.toast.show { transform:translateY(0);opacity:1; }

/* MODAL */
.modal-overlay { position:fixed;inset:0;background:rgba(6,10,18,.85);backdrop-filter:blur(8px);z-index:200;display:none;align-items:center;justify-content:center;padding:24px; }
.modal-overlay.open { display:flex; }
.modal { background:var(--bg-card);border:1px solid var(--border);border-radius:20px;width:100%;max-width:520px;padding:36px;animation:slideIn .3s ease; }
.modal-header { display:flex;align-items:center;justify-content:space-between;margin-bottom:24px; }
.modal-title { font-family:'Space Grotesk',sans-serif;font-size:18px;font-weight:700; }
.modal-close { background:none;border:none;color:var(--text-muted);font-size:20px;cursor:pointer;padding:4px; }
.modal-close:hover { color:var(--text-primary); }
.hop-path { display:flex;flex-direction:column;gap:8px; }
.hop-item { display:flex;align-items:center;gap:12px;padding:10px 14px;background:var(--bg-surface);border-radius:var(--radius-sm);font-family:'JetBrains Mono',monospace;font-size:12px;color:var(--text-secondary); }
.hop-item.first { color:var(--cyan);border-left:2px solid var(--cyan); }
.hop-item.last { color:var(--magenta);border-left:2px solid var(--magenta); }
.hop-arrow { color:var(--text-muted);font-size:10px;padding-left:26px; }

/* ADMIN */
.admin-wrap { max-width:900px;margin:80px auto;padding:24px; }
.admin-header { display:flex;align-items:center;justify-content:space-between;margin-bottom:32px; }
.admin-title { font-family:'Space Grotesk',sans-serif;font-size:24px;font-weight:700; }

/* LOGIN */
.login-wrap { min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px; }
.login-card { background:var(--bg-card);border:1px solid var(--border);border-radius:20px;width:100%;max-width:400px;padding:40px; }
.login-title { font-family:'Space Grotesk',sans-serif;font-size:22px;font-weight:700;margin-bottom:8px;text-align:center; }
.login-sub { font-size:13px;color:var(--text-muted);text-align:center;margin-bottom:32px; }
.error-msg { background:rgba(255,45,120,.1);border:1px solid rgba(255,45,120,.3);color:var(--magenta);padding:12px 16px;border-radius:var(--radius-sm);font-size:13px;margin-bottom:20px; }

/* FADE IN */
.fade-in { opacity:0;transform:translateY(20px);transition:opacity .6s ease,transform .6s ease; }
.fade-in.visible { opacity:1;transform:translateY(0); }

footer { position:relative;z-index:1;text-align:center;padding:32px;border-top:1px solid var(--border);color:var(--text-muted);font-size:13px; }
footer span { color:var(--cyan); }

@media (max-width:700px) {
  nav { padding:14px 20px; }
  .hero { padding:120px 20px 60px; }
  .panel { padding:24px 20px; }
  .features-grid,.stats-grid { grid-template-columns:1fr; }
  .shadow-grid { grid-template-columns:1fr; }
}