:root {
    --bg: #0d1117;
    --bg-alt: #161b22;
    --card: #1a2029;
    --border: #2a3140;
    --accent: #3b82f6;
    --accent-2: #22c55e;
    --danger: #ef4444;
    --text: #e6edf3;
    --text-dim: #8b949e;
    --radius: 14px;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: 'Segoe UI', Roboto, Arial, sans-serif;
    line-height: 1.5;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.container { max-width: 1100px; margin: 0 auto; padding: 0 18px; }

/* ---------------- Navbar ---------------- */
.navbar {
    background: var(--bg-alt);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 50;
}
.navbar-inner {
    max-width: 1100px;
    margin: 0 auto;
    padding: 14px 18px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.brand { font-size: 20px; font-weight: 700; color: var(--text); }
.brand span { color: var(--accent); }

.nav-links { display: flex; gap: 20px; align-items: center; }
.nav-links a { color: var(--text-dim); font-weight: 500; }
.nav-links a:hover { color: var(--text); text-decoration: none; }
.nav-links .btn { color: #fff; }

.hamburger {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 6px;
}
.hamburger span {
    width: 24px;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
}

.mobile-menu {
    display: none;
    flex-direction: column;
    background: var(--bg-alt);
    border-top: 1px solid var(--border);
}
.mobile-menu a {
    padding: 12px 18px;
    color: var(--text-dim);
    border-bottom: 1px solid var(--border);
}
.mobile-menu.open { display: flex; }

@media (max-width: 760px) {
    .nav-links { display: none; }
    .hamburger { display: flex; }
}

/* ---------------- Buttons ---------------- */
.btn {
    display: inline-block;
    padding: 10px 20px;
    border-radius: 10px;
    background: var(--accent);
    color: #fff !important;
    border: none;
    cursor: pointer;
    font-size: 15px;
    font-weight: 600;
    transition: transform .15s ease, box-shadow .15s ease;
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 6px 18px rgba(59,130,246,.35); text-decoration: none; }
.btn-outline { background: transparent; border: 1px solid var(--border); color: var(--text) !important; }
.btn-danger { background: var(--danger); }
.btn-green { background: var(--accent-2); }
.btn-block { display: block; width: 100%; text-align: center; }

/* ---------------- Cards ---------------- */
.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 22px;
    transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease;
}
.card:hover {
    transform: scale(1.02);
    border-color: var(--accent);
    box-shadow: 0 10px 30px rgba(0,0,0,.35);
}

.grid {
    display: grid;
    gap: 18px;
    grid-template-columns: repeat(4, 1fr);
    margin: 24px 0;
}
@media (max-width: 900px) { .grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 480px) { .grid { grid-template-columns: 1fr; } }

.stat-label { color: var(--text-dim); font-size: 13px; text-transform: uppercase; letter-spacing: .04em; }
.stat-value { font-size: 26px; font-weight: 700; margin-top: 6px; }

/* ---------------- Hero ---------------- */
.hero { text-align: center; padding: 70px 18px; }
.hero h1 { font-size: 38px; margin-bottom: 12px; }
.hero p { color: var(--text-dim); font-size: 17px; max-width: 560px; margin: 0 auto 26px; }
.hero .btn { margin: 0 8px; }

/* ---------------- Forms ---------------- */
.form-card { max-width: 420px; margin: 50px auto; }
.form-group { margin-bottom: 16px; }
label { display: block; margin-bottom: 6px; font-size: 14px; color: var(--text-dim); }
input[type=text], input[type=email], input[type=password], input[type=number], textarea, select {
    width: 100%;
    padding: 11px 12px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: var(--bg);
    color: var(--text);
    font-size: 15px;
}
input:focus, textarea:focus, select:focus { outline: none; border-color: var(--accent); }

.alert { padding: 12px 14px; border-radius: 8px; margin-bottom: 16px; font-size: 14px; }
.alert-success { background: rgba(34,197,94,.12); border: 1px solid var(--accent-2); color: var(--accent-2); }
.alert-error { background: rgba(239,68,68,.12); border: 1px solid var(--danger); color: var(--danger); }

/* ---------------- Captcha ---------------- */
.captcha-icons { display: flex; gap: 10px; flex-wrap: wrap; margin: 10px 0; }
.captcha-icon {
    font-size: 26px;
    width: 52px;
    height: 52px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    cursor: pointer;
}
.captcha-icon:hover { border-color: var(--accent); }
.captcha-icon.selected { border-color: var(--accent-2); }
.captcha-target { font-size: 30px; }

/* ---------------- Table ---------------- */
table { width: 100%; border-collapse: collapse; margin-top: 10px; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); font-size: 14px; }
th { color: var(--text-dim); font-weight: 600; text-transform: uppercase; font-size: 12px; }

.badge { padding: 3px 10px; border-radius: 20px; font-size: 12px; font-weight: 600; }
.badge-green { background: rgba(34,197,94,.15); color: var(--accent-2); }
.badge-red { background: rgba(239,68,68,.15); color: var(--danger); }
.badge-yellow { background: rgba(234,179,8,.15); color: #eab308; }

/* ---------------- Footer ---------------- */
.footer {
    border-top: 1px solid var(--border);
    margin-top: 60px;
    padding: 20px 18px;
    color: var(--text-dim);
    font-size: 13px;
}
.footer-inner { max-width: 1100px; margin: 0 auto; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; }

/* ---------------- Code box (embed snippets) ---------------- */
.code-box {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 14px;
    font-family: Consolas, Menlo, monospace;
    font-size: 13px;
    word-break: break-all;
    color: var(--accent-2);
}

/* ---------------- Direct link landing page ---------------- */
.landing-wrap {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    text-align: center;
    gap: 18px;
}
.spinner {
    width: 42px; height: 42px;
    border: 4px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }