:root {
    --bg-color: #0f172a;
    --card-bg: rgba(30, 41, 59, 0.7);
    --accent-color: #38bdf8;
    --accent-glow: rgba(56, 189, 248, 0.3);
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --border-color: rgba(255, 255, 255, 0.1);
    --success: #10b981;
    --danger: #ef4444;
    --glass: rgba(255, 255, 255, 0.03);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    overflow-x: hidden;
    min-height: 100vh;
}

.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-shell {
    margin: 0;
    padding: 2rem;
    width: 100%;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-panel {
    width: min(420px, 100%);
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    padding: 2rem;
}

.login-brand {
    color: var(--accent-color);
    font-size: 1.25rem;
    font-weight: 800;
    margin-bottom: 1rem;
}

.login-error {
    min-height: 1.5rem;
    color: var(--danger);
    margin-top: 1rem;
}

/* Layout */
.app-container {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
aside {
    width: 260px;
    background: rgba(15, 23, 42, 0.95);
    border-right: 1px solid var(--border-color);
    padding: 2rem 1.5rem;
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    z-index: 100;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--accent-color);
    margin-bottom: 3rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

nav ul {
    list-style: none;
}

nav li {
    margin-bottom: 0.5rem;
}

nav a {
    color: var(--text-secondary);
    text-decoration: none;
    padding: 0.8rem 1rem;
    border-radius: 0.75rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

nav a:hover, nav a.active {
    background: var(--glass);
    color: var(--accent-color);
    box-shadow: inset 0 0 0 1px var(--border-color);
}

nav a i {
    font-size: 1.2rem;
}

/* Main Content */
main {
    flex: 1;
    margin-left: 260px;
    padding: 2rem 3rem;
    animation: fadeIn 0.5s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Header */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 3rem;
}

h1 {
    font-size: 1.875rem;
    font-weight: 700;
}

/* Cards & Stats */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.stat-card {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: 1.25rem;
    border: 1px solid var(--border-color);
    backdrop-filter: blur(10px);
}

.stat-card .label {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: 0.5rem;
}

.stat-card .value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent-color);
}

/* Forms & Tables */
.content-section {
    background: var(--card-bg);
    border-radius: 1.5rem;
    border: 1px solid var(--border-color);
    padding: 2rem;
    margin-bottom: 2rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

input, select {
    width: 100%;
    background: rgba(15, 23, 42, 0.5);
    border: 1px solid var(--border-color);
    padding: 0.75rem 1rem;
    border-radius: 0.75rem;
    color: white;
    outline: none;
    transition: border-color 0.3s;
}

input:focus, select:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 2px var(--accent-glow);
}

button {
    background: var(--accent-color);
    color: var(--bg-color);
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    transition: filter 0.3s;
}

button:hover {
    filter: brightness(1.1);
}

button.secondary {
    background: var(--glass);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

/* Tables */
table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
}

th {
    text-align: left;
    color: var(--text-secondary);
    font-weight: 500;
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
}

td {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
}

tr:hover td {
    background: rgba(255, 255, 255, 0.02);
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    backdrop-filter: blur(5px);
}

.modal-content {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    padding: 2.5rem;
    border-radius: 1.5rem;
    width: 500px;
    max-width: 90%;
}

.license-box {
    background: var(--glass);
    padding: 1.25rem;
    border-radius: 1rem;
    border: 1px dashed var(--accent-color);
    text-align: center;
    margin: 1.5rem 0;
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.1rem;
    line-height: 1.5;
    color: var(--accent-color);
    word-break: break-all;
}

.activation-code-box {
    font-size: 2.6rem;
    letter-spacing: 0.3rem;
    word-break: normal;
}

.modal-note {
    color: var(--text-secondary);
    margin: -0.5rem 0 1.5rem;
    line-height: 1.6;
}

.form-error {
    color: var(--danger);
    min-height: 1.5rem;
    margin-top: 1rem;
}

/* Charts */
.chart-container {
    height: 300px;
    margin-top: 1rem;
}

.activation-code-form {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr 1fr auto;
    gap: 1rem;
    align-items: end;
    margin-top: 1.5rem;
}

.identity-code {
    color: var(--accent-color);
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: 0;
}

.status-pill {
    display: inline-flex;
    align-items: center;
    border: 1px solid var(--border-color);
    border-radius: 999px;
    padding: 0.25rem 0.6rem;
    color: var(--success);
    background: rgba(16, 185, 129, 0.08);
}