:root {
    --color-bg: #ffffff;
    --color-bg-subtle: #f8fafc;
    --color-border: #e5e7eb;
    --color-text: #0f172a;
    --color-text-muted: #64748b;
    --color-accent: #2563eb;
    --color-accent-hover: #1d4ed8;
    --color-danger: #dc2626;
    --color-danger-bg: #fef2f2;

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;

    --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.04);
    --shadow-md: 0 4px 16px rgba(15, 23, 42, 0.06);

    --font-sans: 'Manrope', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: var(--font-sans);
    color: var(--color-text);
    background: var(--color-bg);
    -webkit-font-smoothing: antialiased;
}

/* ===== Auth (login) ===== */

.auth-body {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-subtle);
    padding: 24px;
}

.auth-card {
    width: 100%;
    max-width: 380px;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    padding: 40px 32px;
}

.auth-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 32px;
}

.auth-brand-mark {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
    background: var(--color-accent);
    color: #fff;
    font-weight: 700;
    font-size: 13px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.auth-brand-name {
    font-weight: 600;
    font-size: 15px;
    color: var(--color-text);
}

.auth-title {
    font-size: 22px;
    font-weight: 700;
    margin: 0 0 4px;
}

.auth-subtitle {
    font-size: 14px;
    color: var(--color-text-muted);
    margin: 0 0 24px;
}

.auth-alert {
    background: var(--color-danger-bg);
    color: var(--color-danger);
    font-size: 13px;
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    margin-bottom: 16px;
}

.auth-form {
    display: flex;
    flex-direction: column;
}

/* ===== Forme (deljeno kroz celu aplikaciju) ===== */

.form-label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--color-text);
    margin: 14px 0 6px;
}

.form-label:first-of-type { margin-top: 0; }

.form-card small, .auth-card small {
    display: block;
    margin-top: 6px;
    font-size: 12px;
    line-height: 1.5;
}

.form-input {
    font-family: var(--font-sans);
    font-size: 14px;
    padding: 10px 12px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: var(--color-bg);
    color: var(--color-text);
    transition: border-color 0.15s ease;
    width: 100%;
    display: block;
    box-sizing: border-box;
}

.form-input:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

.form-checkbox {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--color-text-muted);
    margin: 18px 0 22px;
    cursor: pointer;
}

/* ===== Dugmad ===== */

.btn {
    font-family: var(--font-sans);
    font-size: 14px;
    font-weight: 600;
    padding: 10px 18px;
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    cursor: pointer;
    transition: background-color 0.15s ease, border-color 0.15s ease;
}

.btn-primary {
    background: var(--color-accent);
    color: #fff;
}

.btn-primary:hover { background: var(--color-accent-hover); }

.btn-block { width: 100%; }

.btn-secondary {
    background: #fff;
    color: var(--color-text);
    border-color: var(--color-border);
}

.btn-secondary:hover { background: var(--color-bg-subtle); }

.btn-danger {
    background: #fff;
    color: var(--color-danger);
    border-color: #fecaca;
}

.btn-danger:hover { background: var(--color-danger-bg); }

.btn-sm { padding: 6px 12px; font-size: 13px; }

/* ===== App shell ===== */

.app-body { background: var(--color-bg-subtle); }

.app-shell {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 220px;
    flex-shrink: 0;
    background: #fff;
    border-right: 1px solid var(--color-border);
    padding: 24px 16px;
    display: flex;
    flex-direction: column;
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 0 8px;
    margin-bottom: 28px;
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: 2px;
    flex: 1;
}

.nav-link {
    display: block;
    padding: 9px 12px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text-muted);
    text-decoration: none;
    border: none;
    background: none;
    text-align: left;
    cursor: pointer;
    font-family: var(--font-sans);
}

.nav-link:hover { background: var(--color-bg-subtle); color: var(--color-text); }

.nav-link-active {
    background: rgba(37, 99, 235, 0.08);
    color: var(--color-accent);
    font-weight: 600;
}

.sidebar-logout { margin-top: auto; padding-top: 16px; border-top: 1px solid var(--color-border); }
.nav-link-logout { width: 100%; }

.app-main {
    flex: 1;
    padding: 32px 40px;
    max-width: 1200px;
}

.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
    gap: 16px;
}

.page-title { font-size: 22px; font-weight: 700; margin: 0; }
.page-actions { display: flex; gap: 8px; flex-wrap: wrap; }

/* ===== Kartice / statistika ===== */

.stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 16px;
    margin-bottom: 28px;
}

.card {
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    padding: 20px;
}

.stat-label { font-size: 13px; color: var(--color-text-muted); margin: 0 0 8px; }
.stat-value { font-size: 26px; font-weight: 700; margin: 0; }
.stat-sub { font-size: 12px; color: var(--color-text-muted); margin-top: 4px; }

.quick-actions { display: flex; gap: 12px; margin-bottom: 28px; flex-wrap: wrap; }

/* ===== Tabele ===== */

.table-card {
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

table.data-table { width: 100%; border-collapse: collapse; font-size: 14px; }

.data-table th {
    text-align: left;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    color: var(--color-text-muted);
    font-weight: 600;
    padding: 12px 20px;
    border-bottom: 1px solid var(--color-border);
    background: var(--color-bg-subtle);
}

.data-table td {
    padding: 13px 20px;
    border-bottom: 1px solid var(--color-border);
    color: var(--color-text);
}

.data-table tr:last-child td { border-bottom: none; }
.data-table tr:hover td { background: var(--color-bg-subtle); }

.empty-state {
    padding: 48px 20px;
    text-align: center;
    color: var(--color-text-muted);
    font-size: 14px;
}

.badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 600;
    background: var(--color-bg-subtle);
    color: var(--color-text-muted);
}

.badge-blue { background: rgba(37, 99, 235, 0.1); color: var(--color-accent); }
.badge-green { background: #dcfce7; color: #16a34a; }
.badge-red { background: var(--color-danger-bg); color: var(--color-danger); }

/* ===== Flash poruke ===== */

.flash {
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    margin-bottom: 20px;
}

.flash-success { background: #dcfce7; color: #16a34a; }
.flash-error { background: var(--color-danger-bg); color: var(--color-danger); }

/* ===== Forme (izvan auth kartice) ===== */

.form-card {
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    padding: 28px;
    max-width: 560px;
}

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-actions { display: flex; gap: 10px; margin-top: 22px; }

@media (max-width: 720px) {
    .app-shell { flex-direction: column; }
    .sidebar { width: 100%; flex-direction: row; align-items: center; overflow-x: auto; }
    .sidebar-nav { flex-direction: row; }
    .sidebar-logout { margin-top: 0; padding-top: 0; border-top: none; margin-left: auto; }
    .app-main { padding: 20px; }
    .form-row { grid-template-columns: 1fr; }
}