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

/* ===== Theme Variables ===== */

:root, [data-theme="light"] {
    --bg: #FAF6F0;
    --bg-sidebar: #FFFFFF;
    --bg-sidebar-border: #E8E2D8;
    --bg-card: #FFFFFF;
    --bg-card-border: #E8E2D8;
    --bg-card-hover-shadow: 0 4px 16px rgba(0,0,0,0.06);
    --bg-topbar: #FFFFFF;
    --bg-topbar-border: #E8E2D8;
    --input-border: #E5E0D8;
    --accent: #DA7756;
    --accent-bg: rgba(218, 119, 86, 0.1);
    --accent-border: rgba(218, 119, 86, 0.2);
    --text: #2D2D2D;
    --text-muted: #8A8A8A;
    --green: #2F9461;
    --green-bg: rgba(47, 148, 97, 0.1);
    --red: #D94452;
    --red-bg: rgba(217, 68, 82, 0.1);
    --yellow: #C08B1A;
    --yellow-bg: rgba(192, 139, 26, 0.1);
    --blue: #4A72B8;
    --blue-bg: rgba(74, 114, 184, 0.1);
    --sidebar-w: 240px;
    --nav-active-bg: rgba(218, 119, 86, 0.08);
}

[data-theme="dark"] {
    --bg: #1A1A1A;
    --bg-sidebar: #1E1E1E;
    --bg-sidebar-border: #2A2A2A;
    --bg-card: #242424;
    --bg-card-border: #333333;
    --bg-card-hover-shadow: 0 4px 24px rgba(0,0,0,0.4);
    --bg-topbar: #1E1E1E;
    --bg-topbar-border: #2A2A2A;
    --input-border: #333333;
    --accent: #DA7756;
    --accent-bg: rgba(218, 119, 86, 0.15);
    --accent-border: rgba(218, 119, 86, 0.25);
    --text: #F0F0F0;
    --text-muted: #777777;
    --green: #48bb78;
    --green-bg: rgba(72, 187, 120, 0.15);
    --red: #fc5c65;
    --red-bg: rgba(252, 92, 101, 0.15);
    --yellow: #f7b731;
    --yellow-bg: rgba(247, 183, 49, 0.15);
    --blue: #6382ff;
    --blue-bg: rgba(99, 130, 255, 0.15);
    --sidebar-w: 240px;
    --nav-active-bg: rgba(218, 119, 86, 0.12);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    display: flex;
    transition: background 0.3s, color 0.3s;
}

/* Hide all content until authenticated */
.sidebar,
.main {
    visibility: hidden;
    opacity: 0;
    transition: opacity 0.3s;
}

body.authenticated .sidebar,
body.authenticated .main {
    visibility: visible;
    opacity: 1;
}

/* ===== Sidebar ===== */

.sidebar {
    width: var(--sidebar-w);
    background: var(--bg-sidebar);
    border-right: 1px solid var(--bg-sidebar-border);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 100;
    transition: transform 0.3s ease, background 0.3s, border-color 0.3s;
}

.sidebar-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--bg-sidebar-border);
    transition: border-color 0.3s;
}

.sidebar-logo { display: block; }

.sidebar-logo .logo-branch { stroke: var(--accent); }
.sidebar-logo .logo-branch-fill { fill: var(--accent); }
.sidebar-logo .logo-node { fill: var(--text); transition: fill 0.3s; }
.sidebar-logo .logo-text { fill: var(--text); transition: fill 0.3s; }
.sidebar-logo .logo-accent { fill: var(--accent); }

.subtitle {
    display: block;
    font-size: 0.72rem;
    color: var(--text-muted);
    margin-top: 0.2rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
}

.sidebar-nav {
    flex: 1;
    padding: 1rem 0;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1.5rem;
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    transition: background 0.2s, color 0.2s;
    border-left: 3px solid transparent;
}

.nav-item:hover {
    background: var(--nav-active-bg);
    color: var(--text);
}

.nav-item.active {
    color: var(--accent);
    background: var(--nav-active-bg);
    border-left-color: var(--accent);
}

.nav-item.disabled {
    opacity: 0.35;
    pointer-events: none;
}

.nav-item.logout {
    margin-top: auto;
    color: var(--red);
}

.nav-item.logout:hover {
    background: var(--red-bg);
    color: var(--red);
}

.sidebar-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--bg-sidebar-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: border-color 0.3s;
}

.version {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* ===== Theme Toggle ===== */

.theme-toggle {
    background: transparent;
    border: 1px solid var(--input-border);
    border-radius: 6px;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background 0.3s, border-color 0.3s;
}

.theme-toggle:hover {
    border-color: var(--accent);
}

.theme-toggle svg {
    width: 16px;
    height: 16px;
    fill: var(--text-muted);
    transition: fill 0.3s;
}

.theme-toggle .icon-moon { display: none; }
[data-theme="dark"] .theme-toggle .icon-sun { display: none; }
[data-theme="dark"] .theme-toggle .icon-moon { display: block; }

/* ===== Main Area ===== */

.main {
    flex: 1;
    margin-left: var(--sidebar-w);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    transition: margin-left 0.3s;
}

.topbar {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 2rem;
    background: var(--bg-topbar);
    border-bottom: 1px solid var(--bg-topbar-border);
    transition: background 0.3s, border-color 0.3s;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text);
    cursor: pointer;
}

.page-title {
    font-size: 1.2rem;
    font-weight: 600;
}

.topbar-right {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.last-updated {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.btn-refresh {
    background: none;
    border: 1px solid var(--input-border);
    border-radius: 6px;
    color: var(--text);
    padding: 0.4rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: border-color 0.2s, background 0.2s;
}

.btn-refresh:hover {
    border-color: var(--accent);
    background: var(--accent-bg);
}

.btn-refresh.spinning svg {
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ===== Status Cards ===== */

.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.25rem;
    padding: 2rem;
}

.card {
    background: var(--bg-card);
    border: 1px solid var(--bg-card-border);
    border-radius: 12px;
    padding: 1.5rem;
    display: flex;
    gap: 1rem;
    transition: border-color 0.3s, box-shadow 0.3s, background 0.3s;
}

.card:hover {
    box-shadow: var(--bg-card-hover-shadow);
}

.card-icon {
    width: 48px;
    height: 48px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.card-icon.api {
    background: var(--accent-bg);
    color: var(--accent);
}

.card-icon.mongo {
    background: var(--green-bg);
    color: var(--green);
}

.card-icon.uptime {
    background: var(--blue-bg);
    color: var(--blue);
}

.card-body h3 {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.card-detail {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
}

/* ===== Status Badges ===== */

.status-badge {
    display: inline-block;
    padding: 0.2rem 0.75rem;
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 600;
}

.status-badge.loading {
    background: var(--yellow-bg);
    color: var(--yellow);
}

.status-badge.ok {
    background: var(--green-bg);
    color: var(--green);
}

.status-badge.error {
    background: var(--red-bg);
    color: var(--red);
}

/* ===== Info Panel ===== */

.info-panel {
    margin: 0 2rem 2rem;
    background: var(--bg-card);
    border: 1px solid var(--bg-card-border);
    border-radius: 12px;
    padding: 1.5rem;
    transition: background 0.3s, border-color 0.3s;
}

.info-panel h3 {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.info-table {
    width: 100%;
    border-collapse: collapse;
}

.info-table td {
    padding: 0.6rem 0;
    font-size: 0.85rem;
    border-bottom: 1px solid var(--bg-card-border);
    transition: border-color 0.3s;
}

.info-table td:first-child {
    color: var(--text-muted);
    width: 160px;
}

/* ===== Admin Login Overlay ===== */

.admin-login-overlay {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 200;
    background: var(--bg);
    align-items: center;
    justify-content: center;
    padding: 1rem;
    transition: background 0.3s;
}

.admin-login-card {
    width: 100%;
    max-width: 400px;
    background: var(--bg-card);
    border: 1px solid var(--bg-card-border);
    border-radius: 12px;
    padding: 2rem;
    transition: background 0.3s, border-color 0.3s;
}

.admin-login-branding {
    text-align: center;
    margin-bottom: 1.5rem;
}

.admin-login-branding svg { display: inline-block; }
.admin-login-branding .logo-branch { stroke: var(--accent); }
.admin-login-branding .logo-branch-fill { fill: var(--accent); }
.admin-login-branding .logo-node { fill: var(--text); transition: fill 0.3s; }
.admin-login-branding .logo-text { fill: var(--text); transition: fill 0.3s; }
.admin-login-branding .logo-accent { fill: var(--accent); }

.admin-login-subtitle {
    display: block;
    font-size: 0.72rem;
    color: var(--text-muted);
    margin-top: 0.3rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
}

.al-form-group {
    margin-bottom: 1rem;
}

.al-form-group label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 0.35rem;
    font-weight: 500;
}

.al-form-group input {
    width: 100%;
    padding: 0.7rem 0.9rem;
    background: var(--bg);
    border: 1px solid var(--input-border);
    border-radius: 8px;
    color: var(--text);
    font-size: 0.95rem;
    font-family: inherit;
    outline: none;
    transition: border-color 0.2s, background 0.3s, color 0.3s;
}

.al-form-group input::placeholder {
    color: var(--text-muted);
    opacity: 0.6;
}

.al-form-group input:focus {
    border-color: var(--accent);
}

.al-form-group input.invalid {
    border-color: var(--red);
}

.al-error-msg {
    color: var(--red);
    font-size: 0.78rem;
    margin-top: 0.3rem;
    display: none;
}

.al-forgot-link {
    display: block;
    text-align: right;
    margin-top: -0.5rem;
    margin-bottom: 0.5rem;
    font-size: 0.8rem;
    color: var(--accent);
    text-decoration: none;
    cursor: pointer;
}

.al-forgot-link:hover {
    text-decoration: underline;
}

.al-submit-btn {
    width: 100%;
    padding: 0.75rem;
    background: var(--accent);
    border: none;
    border-radius: 8px;
    color: #fff;
    font-size: 1rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    margin-top: 0.5rem;
    transition: background 0.2s, opacity 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.al-submit-btn:hover {
    background: #C96A4A;
}

.al-submit-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

.al-btn-spinner {
    display: none;
    width: 18px;
    height: 18px;
    border: 2px solid rgba(255,255,255,0.3);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

.al-submit-btn.loading .al-btn-text {
    opacity: 0.7;
}

.al-submit-btn.loading .al-btn-spinner {
    display: inline-block;
}

.al-error-banner {
    margin-top: 1rem;
    padding: 0.6rem 0.9rem;
    background: var(--red-bg);
    color: var(--red);
    border-radius: 8px;
    font-size: 0.85rem;
    text-align: center;
}

.al-title {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 0.4rem;
    text-align: center;
}

.al-subtitle {
    font-size: 0.88rem;
    color: var(--text-muted);
    margin-bottom: 1.25rem;
    text-align: center;
    line-height: 1.5;
}

.al-back-link {
    display: block;
    text-align: center;
    margin-top: 1.25rem;
    font-size: 0.85rem;
    color: var(--accent);
    text-decoration: none;
}

.al-back-link:hover {
    text-decoration: underline;
}

.al-success-icon {
    text-align: center;
    margin-bottom: 1rem;
    color: var(--green);
}

.admin-login-footer {
    text-align: center;
    margin-top: 1.5rem;
    padding-top: 1rem;
    border-top: 1px solid var(--bg-card-border);
    font-size: 0.8rem;
}

.admin-login-footer a {
    color: var(--accent);
    text-decoration: none;
}

.admin-login-footer a:hover {
    text-decoration: underline;
}

/* Theme toggle floating button (login overlay) */
.theme-toggle-float {
    position: fixed;
    top: 1.2rem;
    right: 1.2rem;
    background: var(--bg-card);
    border: 1px solid var(--input-border);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background 0.3s, border-color 0.3s;
    z-index: 201;
}

.theme-toggle-float:hover {
    border-color: var(--accent);
}

.theme-toggle-float svg {
    width: 18px;
    height: 18px;
    fill: var(--text-muted);
    transition: fill 0.3s;
}

.theme-toggle-float .icon-moon { display: none; }
[data-theme="dark"] .theme-toggle-float .icon-sun { display: none; }
[data-theme="dark"] .theme-toggle-float .icon-moon { display: block; }

/* Admin toast */
.admin-toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--bg-card);
    color: var(--text);
    padding: 0.8rem 1.5rem;
    border-radius: 8px;
    border: 1px solid var(--accent);
    font-size: 0.9rem;
    opacity: 0;
    transition: transform 0.3s ease, opacity 0.3s ease;
    z-index: 1000;
    pointer-events: none;
    max-width: 90%;
    text-align: center;
}

.admin-toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

/* ===== Responsive ===== */

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .main {
        margin-left: 0;
    }

    .menu-toggle {
        display: flex;
    }

    .cards {
        padding: 1rem;
        gap: 1rem;
    }

    .info-panel {
        margin: 0 1rem 1rem;
    }

    .topbar {
        padding: 1rem;
    }
}