:root {
    --ac-orange: #F57C00;
    --ac-dark: #1a1a2e;
    --ac-grey: #f5f5f5;
    --ac-text: #212121;
    --ac-muted: #757575;
    --ac-border: #e0e0e0;
    --ac-success: #43a047;
    --ac-danger: #e53935;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background: var(--ac-grey);
    color: var(--ac-text);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.ac-header {
    background: var(--ac-dark);
    color: #fff;
    padding: 0.75rem 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.ac-header .brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.1rem;
    font-weight: 600;
    letter-spacing: 0.02em;
}

.ac-header .brand .logo {
    width: 32px;
    height: 32px;
}

.ac-header .subtitle {
    font-size: 0.8rem;
    color: var(--ac-orange);
    font-weight: 400;
}

.ac-header nav {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.ac-header nav a {
    color: #ccc;
    text-decoration: none;
    font-size: 0.85rem;
}

.ac-header nav a:hover { color: #fff; }

/* Main content */
.ac-main {
    flex: 1;
    max-width: 960px;
    width: 100%;
    margin: 2rem auto;
    padding: 0 1rem;
}

/* Cards */
.ac-card {
    background: #fff;
    border: 1px solid var(--ac-border);
    border-radius: 8px;
    padding: 2rem;
    margin-bottom: 1.5rem;
}

.ac-card h2 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    color: var(--ac-dark);
}

/* Table */
.ac-table {
    width: 100%;
    border-collapse: collapse;
}

.ac-table th {
    text-align: left;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--ac-muted);
    padding: 0.5rem 0.75rem;
    border-bottom: 2px solid var(--ac-border);
}

.ac-table td {
    padding: 0.75rem;
    border-bottom: 1px solid var(--ac-border);
    font-size: 0.9rem;
}

.ac-table tr:hover { background: #fafafa; }

/* Badges */
.badge {
    display: inline-block;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.badge-windows { background: #e3f2fd; color: #1565c0; }
.badge-linux { background: #f3e5f5; color: #7b1fa2; }
.badge-cross { background: #fff3e0; color: #e65100; }

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.5rem 1.25rem;
    border: none;
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: opacity 0.15s;
}

.btn:hover { opacity: 0.85; }

.btn-primary { background: var(--ac-orange); color: #fff; }
.btn-secondary { background: var(--ac-dark); color: #fff; }
.btn-sm { padding: 0.3rem 0.75rem; font-size: 0.8rem; }

/* Forms */
.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--ac-muted);
    margin-bottom: 0.3rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.form-group input {
    width: 100%;
    padding: 0.6rem 0.75rem;
    border: 1px solid var(--ac-border);
    border-radius: 6px;
    font-size: 0.9rem;
}

.form-group input:focus {
    outline: none;
    border-color: var(--ac-orange);
    box-shadow: 0 0 0 2px rgba(245, 124, 0, 0.15);
}

/* Error */
.alert-error {
    background: #ffebee;
    color: var(--ac-danger);
    padding: 0.75rem 1rem;
    border-radius: 6px;
    margin-bottom: 1rem;
    font-size: 0.85rem;
}

/* Login page */
.login-container {
    max-width: 400px;
    margin: 4rem auto;
    padding: 0 1rem;
}

.login-container .ac-card {
    padding: 2.5rem;
}

.login-title {
    text-align: center;
    margin-bottom: 0.25rem;
    font-size: 1.3rem;
    color: var(--ac-dark);
}

.login-subtitle {
    text-align: center;
    color: var(--ac-muted);
    font-size: 0.85rem;
    margin-bottom: 1.5rem;
}

/* Footer */
.ac-footer {
    text-align: center;
    padding: 1.5rem;
    font-size: 0.75rem;
    color: var(--ac-muted);
    border-top: 1px solid var(--ac-border);
}

/* Detail page */
.detail-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.detail-item label {
    font-size: 0.75rem;
    color: var(--ac-muted);
    text-transform: uppercase;
}

.detail-item .value {
    font-size: 1rem;
    font-weight: 500;
    margin-top: 0.2rem;
}

/* Empty state */
.empty-state {
    text-align: center;
    padding: 3rem;
    color: var(--ac-muted);
}