@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500;700&display=swap');

/* ── Root & Reset ── */
:root {
    --bg-primary:    #0d1117;
    --bg-secondary:  #111827;
    --bg-card:       #161f2e;
    --bg-hover:      #1a2535;
    --border:        rgba(255,255,255,0.06);
    --border-bright: rgba(255,255,255,0.1);
    --cyan:          #22d3ee;
    --cyan-dim:      rgba(34,211,238,0.15);
    --cyan-glow:     rgba(34,211,238,0.3);
    --green:         #10b981;
    --green-dim:     rgba(16,185,129,0.15);
    --text-primary:  #e2e8f0;
    --text-muted:    #64748b;
    --text-dim:      #475569;
    --radius:        10px;
    --transition:    0.2s ease;
}

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

body {
    font-family: 'Inter', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    /* Subtle grid pattern */
    background-image:
        linear-gradient(rgba(34,211,238,0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(34,211,238,0.02) 1px, transparent 1px);
    background-size: 40px 40px;
}

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: #1e3a4a; border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--cyan); }

/* ── Navbar ── */
.navbar {
    background: rgba(13,17,23,0.95) !important;
    border-bottom: 1px solid var(--border) !important;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 14px 0;
    position: sticky;
    top: 0;
    z-index: 1050;
}

.navbar-brand {
    font-size: 1.4rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    color: #fff !important;
}

.navbar-brand span { color: var(--cyan); }
.navbar-brand small {
    display: block;
    font-size: .6rem;
    font-weight: 400;
    letter-spacing: .15em;
    color: var(--text-muted);
    text-transform: uppercase;
    margin-top: -4px;
}

.nav-link {
    color: var(--text-muted) !important;
    font-weight: 500;
    font-size: .88rem;
    border-radius: 6px;
    padding: 6px 12px !important;
    transition: all var(--transition);
}

.nav-link:hover {
    color: var(--cyan) !important;
    background: var(--cyan-dim);
}

.dropdown-menu {
    background: var(--bg-card);
    border: 1px solid var(--border-bright);
    border-radius: var(--radius);
    box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}

.dropdown-item {
    color: var(--text-primary);
    font-size: .88rem;
    padding: 8px 16px;
    border-radius: 6px;
    transition: all var(--transition);
}

.dropdown-item:hover {
    background: var(--cyan-dim);
    color: var(--cyan);
}

.dropdown-divider { border-color: var(--border); }

/* ── Buttons ── */
.btn {
    font-weight: 600;
    font-size: .85rem;
    border-radius: 8px;
    transition: all var(--transition);
    letter-spacing: .01em;
}

.btn-primary {
    background: var(--cyan);
    border: none;
    color: #0d1117;
    box-shadow: 0 4px 15px var(--cyan-glow);
}

.btn-primary:hover {
    background: #38bdf8;
    color: #0d1117;
    transform: translateY(-1px);
    box-shadow: 0 6px 20px var(--cyan-glow);
}

.btn-outline-primary {
    border: 1px solid var(--cyan);
    color: var(--cyan);
    background: transparent;
}

.btn-outline-primary:hover {
    background: var(--cyan-dim);
    color: var(--cyan);
    border-color: var(--cyan);
}

.btn-outline-secondary {
    border: 1px solid var(--border-bright);
    color: var(--text-muted);
    background: transparent;
}

.btn-outline-secondary:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
    border-color: var(--border-bright);
}

.btn-success {
    background: var(--green);
    border: none;
    color: #fff;
}

.btn-warning {
    background: #f59e0b;
    border: none;
    color: #0d1117;
}

.btn-danger {
    background: #ef4444;
    border: none;
    color: #fff;
}

.btn-outline-danger {
    border: 1px solid rgba(239,68,68,0.3);
    color: #ef4444;
    background: transparent;
}

.btn-outline-danger:hover {
    background: rgba(239,68,68,0.1);
    color: #ef4444;
}

.btn-outline-warning {
    border: 1px solid rgba(245,158,11,0.4);
    color: #f59e0b;
    background: transparent;
}

.btn-sm { font-size: .8rem; padding: 5px 12px; }
.btn-lg { font-size: .95rem; padding: 11px 24px; }

/* ── Cards ── */
.card {
    background: var(--bg-card) !important;
    border: 1px solid var(--border) !important;
    border-radius: var(--radius) !important;
    color: var(--text-primary);
    transition: border-color var(--transition), box-shadow var(--transition);
}

.card:hover {
    border-color: var(--border-bright) !important;
    box-shadow: 0 8px 30px rgba(0,0,0,0.3) !important;
}

.card-header {
    background: transparent !important;
    border-bottom: 1px solid var(--border) !important;
    color: var(--text-primary);
}

.card-footer {
    background: transparent !important;
    border-top: 1px solid var(--border) !important;
}

/* ── Stat Cards ── */
.stat-card {
    background: var(--bg-card) !important;
    border: 1px solid var(--border) !important;
    border-radius: var(--radius) !important;
    padding: 24px;
    transition: border-color var(--transition);
}

.stat-card:hover { border-color: rgba(34,211,238,0.2) !important; }

.stat-label {
    font-size: .7rem;
    font-weight: 700;
    letter-spacing: .1em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 8px;
}

.stat-value {
    font-family: 'JetBrains Mono', monospace;
    font-size: 2rem;
    font-weight: 700;
    color: var(--cyan);
    line-height: 1;
    margin-bottom: 4px;
}

.stat-sub {
    font-size: .78rem;
    color: var(--text-dim);
}

/* ── Search Bar ── */
.search-bar {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 14px 18px;
    color: var(--text-primary);
    font-size: .9rem;
    width: 100%;
    transition: border-color var(--transition), box-shadow var(--transition);
    outline: none;
}

.search-bar::placeholder { color: var(--text-dim); }

.search-bar:focus {
    border-color: rgba(34,211,238,0.4);
    box-shadow: 0 0 0 3px rgba(34,211,238,0.08);
}

/* ── Forms ── */
.form-control, .form-select {
    background: var(--bg-card) !important;
    border: 1px solid var(--border) !important;
    border-radius: 8px !important;
    color: var(--text-primary) !important;
    padding: 10px 14px;
    font-size: .9rem;
    transition: all var(--transition);
}

.form-control::placeholder { color: var(--text-dim); }

.form-control:focus, .form-select:focus {
    border-color: rgba(34,211,238,0.4) !important;
    box-shadow: 0 0 0 3px rgba(34,211,238,0.08) !important;
    outline: none;
}

.form-select option { background: var(--bg-card); color: var(--text-primary); }

.input-group-text {
    background: var(--bg-card) !important;
    border: 1px solid var(--border) !important;
    color: var(--text-muted) !important;
    border-radius: 8px 0 0 8px !important;
}

.form-label { color: var(--text-muted); font-size: .85rem; font-weight: 500; }

/* ── Subnet Table ── */
.subnet-table-wrap {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
}

.subnet-table-header {
    display: grid;
    grid-template-columns: 60px 1fr 120px 160px 130px;
    padding: 10px 24px;
    border-bottom: 1px solid var(--border);
    background: rgba(255,255,255,0.02);
}

.subnet-table-header span {
    font-size: .68rem;
    font-weight: 700;
    letter-spacing: .1em;
    text-transform: uppercase;
    color: var(--text-dim);
}

.subnet-row {
    display: grid;
    grid-template-columns: 60px 1fr 120px 160px 130px;
    padding: 14px 24px;
    border-bottom: 1px solid var(--border);
    align-items: center;
    transition: background var(--transition);
    cursor: default;
}

.subnet-row:last-child { border-bottom: none; }

.subnet-row:hover { background: var(--bg-hover); }

.subnet-row-num {
    font-size: .75rem;
    color: var(--text-dim);
    font-family: 'JetBrains Mono', monospace;
}

.subnet-ip {
    font-family: 'JetBrains Mono', monospace;
    font-size: .95rem;
    font-weight: 500;
    color: var(--text-primary);
    letter-spacing: .02em;
}

.prefix-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: rgba(34,211,238,0.1);
    border: 1px solid rgba(34,211,238,0.2);
    color: var(--cyan);
    font-family: 'JetBrains Mono', monospace;
    font-size: .82rem;
    font-weight: 600;
    padding: 4px 14px;
    border-radius: 6px;
    letter-spacing: .02em;
}

.hosts-text {
    font-size: .85rem;
    color: var(--text-muted);
    font-family: 'JetBrains Mono', monospace;
}

.status-available {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--green-dim);
    border: 1px solid rgba(16,185,129,0.25);
    color: var(--green);
    font-size: .78rem;
    font-weight: 600;
    padding: 5px 14px;
    border-radius: 6px;
    letter-spacing: .03em;
}

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

@keyframes pulse-dot {
    0%, 100% { opacity: 1; }
    50% { opacity: .4; }
}

.status-locked {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(100,116,139,0.1);
    border: 1px solid rgba(100,116,139,0.2);
    color: var(--text-muted);
    font-size: .78rem;
    font-weight: 600;
    padding: 5px 14px;
    border-radius: 6px;
}

/* ── Price Tag ── */
.price-tag {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--cyan);
}

.price-hidden {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(100,116,139,0.1);
    border: 1px solid rgba(100,116,139,0.15);
    border-radius: 6px;
    padding: 5px 12px;
    font-size: .8rem;
    color: var(--text-dim);
}

/* ── Badges ── */
.badge {
    border-radius: 5px;
    font-size: .7em;
    font-weight: 600;
    padding: 4px 8px;
    letter-spacing: .03em;
}

.bg-primary   { background: rgba(34,211,238,0.15) !important; color: var(--cyan) !important; border: 1px solid rgba(34,211,238,0.2); }
.bg-success   { background: var(--green-dim) !important; color: var(--green) !important; border: 1px solid rgba(16,185,129,0.25); }
.bg-danger    { background: rgba(239,68,68,0.12) !important; color: #f87171 !important; border: 1px solid rgba(239,68,68,0.2); }
.bg-warning   { background: rgba(245,158,11,0.12) !important; color: #fbbf24 !important; border: 1px solid rgba(245,158,11,0.2); }
.bg-info      { background: rgba(99,102,241,0.12) !important; color: #818cf8 !important; border: 1px solid rgba(99,102,241,0.2); }
.bg-secondary { background: rgba(100,116,139,0.1) !important; color: var(--text-muted) !important; border: 1px solid rgba(100,116,139,0.2); }

/* ── Tables ── */
.table {
    color: var(--text-primary);
    border-color: var(--border);
    --bs-table-bg: transparent;
    --bs-table-hover-bg: var(--bg-hover);
    --bs-table-border-color: var(--border);
}

.table thead th {
    font-size: .68rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .1em;
    color: var(--text-dim);
    border-color: var(--border);
    padding: 12px 16px;
    background: rgba(255,255,255,0.02);
}

.table tbody td {
    border-color: var(--border);
    padding: 14px 16px;
    vertical-align: middle;
    color: var(--text-primary);
}

.table tbody tr:hover { background: var(--bg-hover) !important; }

/* ── Alerts ── */
.alert {
    border-radius: var(--radius) !important;
    font-size: .88rem;
}

.alert-success  { background: var(--green-dim); border: 1px solid rgba(16,185,129,0.25); color: #6ee7b7; }
.alert-danger   { background: rgba(239,68,68,0.1); border: 1px solid rgba(239,68,68,0.2); color: #fca5a5; }
.alert-warning  { background: rgba(245,158,11,0.1); border: 1px solid rgba(245,158,11,0.2); color: #fcd34d; }
.alert-info     { background: rgba(34,211,238,0.08); border: 1px solid rgba(34,211,238,0.15); color: var(--cyan); }

/* ── Hero (index page) ── */
.hero-section {
    padding: 60px 0 50px;
    position: relative;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    background: var(--cyan-dim);
    border: 1px solid rgba(34,211,238,0.2);
    color: var(--cyan);
    padding: 5px 14px;
    border-radius: 50px;
    font-size: .78rem;
    font-weight: 600;
    letter-spacing: .05em;
    margin-bottom: 16px;
}

.hero-title {
    font-size: clamp(1.8rem, 4vw, 3rem);
    font-weight: 800;
    color: #fff;
    line-height: 1.1;
    margin-bottom: 14px;
    letter-spacing: -.02em;
}

.hero-title span { color: var(--cyan); }

.hero-subtitle {
    font-size: .95rem;
    color: var(--text-muted);
    margin-bottom: 28px;
    line-height: 1.7;
}

/* ── Auth ── */
.auth-card { max-width: 440px; margin: 0 auto; }
.auth-header {
    background: linear-gradient(135deg, #0f1f35, #0d2a3a);
    border-bottom: 1px solid var(--border);
    padding: 32px 28px 24px;
    text-align: center;
    color: #fff;
}

/* ── Payment options ── */
.payment-option {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 18px;
    cursor: pointer;
    transition: all var(--transition);
    background: var(--bg-card);
    position: relative;
}

.payment-option:hover,
.payment-option.selected {
    border-color: rgba(34,211,238,0.4);
    background: var(--cyan-dim);
}

.payment-option input[type="radio"] { display: none; }

.payment-option-icon { font-size: 1.8rem; display: block; margin-bottom: 6px; }

.payment-check {
    position: absolute;
    top: 10px; right: 10px;
    width: 20px; height: 20px;
    border-radius: 50%;
    border: 1px solid var(--border-bright);
    display: flex; align-items: center; justify-content: center;
    transition: all var(--transition);
    font-size: .7rem;
}

.payment-option.selected .payment-check {
    background: var(--cyan);
    border-color: var(--cyan);
    color: #0d1117;
}

/* ── Welcome Banner ── */
.welcome-banner {
    background: linear-gradient(135deg, #0f1f35, #0d2a3a);
    border: 1px solid rgba(34,211,238,0.15);
    border-radius: var(--radius);
    padding: 28px;
    margin-bottom: 24px;
}

/* ── Theme toggle ── */
#themeToggle {
    width: 36px; height: 36px;
    border-radius: 8px;
    display: flex; align-items: center; justify-content: center;
    padding: 0;
}

/* ── Footer ── */
footer {
    margin-top: auto;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    padding: 28px 0;
}

.footer-brand {
    font-weight: 800;
    font-size: 1.1rem;
    color: #fff;
}

.footer-brand span { color: var(--cyan); }

/* ── Misc ── */
.font-monospace, .font-mono {
    font-family: 'JetBrains Mono', 'Courier New', monospace !important;
}

.text-cyan    { color: var(--cyan) !important; }
.text-muted   { color: var(--text-muted) !important; }
.border-dark  { border-color: var(--border) !important; }

.list-group-item {
    background: transparent;
    border-color: var(--border);
    color: var(--text-primary);
}

.list-group-item:hover { background: var(--bg-hover); }

.dropdown-menu { --bs-dropdown-bg: var(--bg-card); }

/* ── Responsive ── */
@media (max-width: 768px) {
    .subnet-table-header { display: none; }
    .subnet-row {
        grid-template-columns: 1fr;
        gap: 8px;
        padding: 16px;
    }
    .subnet-row-num { display: none; }
}