* { margin: 0; padding: 0; box-sizing: border-box; }
:root {
    --bg: #0a0a1a;
    --surface: #12122a;
    --elevated: #1a1a32;
    --border: rgba(255,255,255,0.08);
    --text: #e8e8f0;
    --text-secondary: rgba(255,255,255,0.55);
    --text-muted: rgba(255,255,255,0.3);
    --accent: #6366f1;
    --accent-light: #818cf8;
    --success: #10b981;
    --error: #f43f5e;
    --warning: #f59e0b;
}
body {
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    min-height: 100vh;
}

/* Login */
.login-wrap {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 24px;
}
.login-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 40px;
    width: 100%;
    max-width: 380px;
    text-align: center;
}
.login-card h1 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 8px;
    background: linear-gradient(135deg, var(--accent-light), #a78bfa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.login-card p { color: var(--text-muted); font-size: 13px; margin-bottom: 24px; }
.input {
    width: 100%;
    background: rgba(255,255,255,0.04);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 12px 16px;
    font-size: 14px;
    color: var(--text);
    outline: none;
    transition: border-color 0.2s;
}
.input:focus { border-color: var(--accent); }
.input::placeholder { color: var(--text-muted); }
.btn {
    width: 100%;
    padding: 12px;
    border: none;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    margin-top: 12px;
}
.btn-primary {
    background: var(--accent);
    color: white;
}
.btn-primary:hover { background: #5558e6; }
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-outline {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-secondary);
}
.btn-outline:hover { border-color: var(--accent); color: var(--text); }
.btn-sm { padding: 6px 12px; font-size: 12px; width: auto; margin-top: 0; border-radius: 8px; }
.btn-danger { background: var(--error); color: white; }
.btn-danger:hover { background: #e11d48; }
.btn-success { background: var(--success); color: white; }
.error-msg { color: var(--error); font-size: 13px; margin-top: 8px; }

/* Dashboard */
.app { max-width: 960px; margin: 0 auto; padding: 0 24px 60px; }
.header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 0;
    border-bottom: 1px solid var(--border);
    margin-bottom: 24px;
}
.header h2 {
    font-size: 18px;
    font-weight: 700;
    color: var(--accent-light);
}
.tabs {
    display: flex;
    gap: 4px;
    margin-bottom: 24px;
    background: var(--surface);
    border-radius: 12px;
    padding: 4px;
    border: 1px solid var(--border);
}
.tab {
    padding: 8px 16px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-size: 13px;
    font-weight: 500;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
}
.tab.active { background: var(--accent); color: white; }
.tab:hover:not(.active) { color: var(--text); }

/* Stats */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 12px;
    margin-bottom: 24px;
}
.stat-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 16px;
    text-align: center;
}
.stat-card .num {
    font-size: 28px;
    font-weight: 700;
    color: var(--accent-light);
}
.stat-card .label {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 4px;
}

/* Create form */
.create-form {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 20px;
    margin-bottom: 20px;
}
.create-form h3 { font-size: 15px; font-weight: 600; margin-bottom: 12px; }
.form-row { display: flex; gap: 10px; flex-wrap: wrap; align-items: flex-end; }
.form-group { flex: 1; min-width: 100px; }
.form-group label { display: block; font-size: 11px; color: var(--text-muted); margin-bottom: 4px; text-transform: uppercase; letter-spacing: 0.5px; }
.form-group .input { width: 100%; }

/* Codes list */
.codes-table { width: 100%; border-collapse: collapse; }
.codes-table th {
    text-align: left;
    padding: 8px 12px;
    font-size: 11px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 1px solid var(--border);
}
.codes-table td {
    padding: 10px 12px;
    font-size: 13px;
    border-bottom: 1px solid var(--border);
    color: var(--text-secondary);
}
.codes-table tr:hover td { background: rgba(255,255,255,0.02); }
.code-text {
    font-family: 'SF Mono', 'Fira Code', monospace;
    color: var(--accent-light);
    font-weight: 600;
    cursor: pointer;
    user-select: all;
}
.badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 6px;
    font-size: 11px;
    font-weight: 600;
}
.badge-unused { background: rgba(16,185,129,0.12); color: var(--success); }
.badge-used { background: rgba(255,255,255,0.06); color: var(--text-muted); }
.badge-inactive { background: rgba(244,63,94,0.12); color: var(--error); }

/* Batch display */
.batch-display {
    background: var(--surface);
    border: 1px solid rgba(99,102,241,0.2);
    border-radius: 14px;
    padding: 20px;
    margin-bottom: 20px;
}
.batch-display h3 { font-size: 15px; margin-bottom: 12px; color: var(--success); }
.batch-codes {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 8px;
    margin-bottom: 12px;
}
.batch-code {
    font-family: 'SF Mono', 'Fira Code', monospace;
    background: rgba(99,102,241,0.08);
    border: 1px solid rgba(99,102,241,0.15);
    border-radius: 8px;
    padding: 8px 12px;
    font-size: 13px;
    color: var(--accent-light);
    cursor: pointer;
    transition: all 0.15s;
    text-align: center;
}
.batch-code:hover { background: rgba(99,102,241,0.15); }
.batch-code.copied { background: rgba(16,185,129,0.12); color: var(--success); border-color: rgba(16,185,129,0.2); }

/* Filter bar */
.filter-bar {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
    flex-wrap: wrap;
    align-items: center;
}
.filter-bar select {
    background: var(--surface);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    border-radius: 8px;
    padding: 6px 12px;
    font-size: 13px;
    outline: none;
}

/* Pagination */
.pagination {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 16px;
}
.pagination button {
    padding: 6px 14px;
    border: 1px solid var(--border);
    background: transparent;
    color: var(--text-secondary);
    border-radius: 8px;
    font-size: 12px;
    cursor: pointer;
}
.pagination button:hover { border-color: var(--accent); color: var(--text); }
.pagination button:disabled { opacity: 0.3; cursor: not-allowed; }
.pagination .current { background: var(--accent); color: white; border-color: var(--accent); }

/* Recent list */
.recent-list { margin-top: 16px; }
.recent-item {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    border-bottom: 1px solid var(--border);
    font-size: 13px;
}
.recent-item .user { color: var(--accent-light); }
.recent-item .time { color: var(--text-muted); }

/* Client limit inline */
.client-limit {
    display: flex;
    align-items: center;
    gap: 4px;
}
.client-limit .input {
    text-align: center;
}

/* Toast */
.toast {
    position: fixed;
    bottom: 24px;
    right: 24px;
    background: var(--success);
    color: white;
    padding: 10px 20px;
    border-radius: 10px;
    font-size: 13px;
    font-weight: 500;
    opacity: 0;
    transform: translateY(10px);
    transition: all 0.3s;
    pointer-events: none;
    z-index: 999;
}
.toast.show { opacity: 1; transform: translateY(0); }

/* Table scroll wrapper */
#codes-list, #users-list { overflow-x: auto; }

/* Responsive */
@media (max-width: 600px) {
    .form-row { flex-direction: column; }
    .codes-table { font-size: 12px; min-width: 600px; }
    .codes-table th, .codes-table td { padding: 6px 8px; }
    .batch-codes { grid-template-columns: 1fr; }
    .header h2 { font-size: 16px; }
}