/* =============================================
   CSS Custom Properties
   ============================================= */
:root {
    --bg:            #1a1a2e;
    --bg-secondary:  #0f0f1a;
    --card:          #16213e;
    --card-hover:    #1c2a50;
    --accent:        #6366f1;
    --accent-hover:  #4f46e5;
    --accent-glow:   rgba(99, 102, 241, 0.25);
    --text:          #e2e8f0;
    --text-muted:    #94a3b8;
    --text-dim:      #475569;
    --border:        rgba(255, 255, 255, 0.07);
    --border-strong: rgba(255, 255, 255, 0.14);
    --shadow:        0 4px 24px rgba(0, 0, 0, 0.45);
    --success:       #10b981;
    --warning:       #f59e0b;
    --error:         #ef4444;
    --light-on:      #fbbf24;
    --light-on-glow: rgba(251, 191, 36, 0.18);
    --cover-open:    #38bdf8;
    --cover-glow:    rgba(56, 189, 248, 0.18);
    --radius:        14px;
    --radius-sm:     8px;
    --transition:    0.18s ease;
}

/* =============================================
   Reset & Base
   ============================================= */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { height: 100%; }

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

button { font-family: inherit; cursor: pointer; }

/* =============================================
   Header
   ============================================= */
header {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.25rem;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.header-brand {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text);
    letter-spacing: -0.01em;
}

.header-icon {
    width: 22px;
    height: 22px;
    color: var(--accent);
}

/* =============================================
   Connection Status
   ============================================= */
.connection-status {
    display: flex;
    align-items: center;
    gap: 0.45rem;
    font-size: 0.8rem;
    color: var(--text-muted);
    background: rgba(255,255,255,0.04);
    padding: 0.3rem 0.75rem;
    border-radius: 20px;
    border: 1px solid var(--border);
}

.status-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--text-dim);
    flex-shrink: 0;
    transition: background var(--transition), box-shadow var(--transition);
}

.status-dot.connected {
    background: var(--success);
    box-shadow: 0 0 8px var(--success);
    animation: pulse 2.5s ease-in-out infinite;
}

.status-dot.polling {
    background: var(--warning);
    box-shadow: 0 0 8px var(--warning);
}

.status-dot.error {
    background: var(--error);
    box-shadow: 0 0 8px var(--error);
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50%       { opacity: 0.4; }
}

/* =============================================
   Tab Navigation
   ============================================= */
.tab-nav {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    display: flex;
    padding: 0 1.25rem;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

/* Wrapper to allow sticky + full-width bg */
nav {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 56px;
    z-index: 90;
}

nav .tab-nav {
    background: transparent;
    border-bottom: none;
}

.tab-btn {
    display: flex;
    align-items: center;
    gap: 0.45rem;
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    color: var(--text-muted);
    padding: 0.9rem 1.1rem;
    font-size: 0.88rem;
    font-weight: 500;
    white-space: nowrap;
    transition: color var(--transition), border-color var(--transition),
                background var(--transition);
    margin-bottom: -1px;
}

.tab-btn svg {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

.tab-btn:hover:not(.active) {
    color: var(--text);
    background: rgba(255,255,255,0.04);
}

.tab-btn.active {
    color: var(--accent);
    border-bottom-color: var(--accent);
}

/* =============================================
   Main Content
   ============================================= */
main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1.5rem 1.25rem 3rem;
}

.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* =============================================
   Section Header
   ============================================= */
.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.25rem;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.section-header h2 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text);
    letter-spacing: -0.01em;
}

.section-controls {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

/* =============================================
   Buttons
   ============================================= */
.btn-secondary {
    background: rgba(255,255,255,0.06);
    border: 1px solid var(--border-strong);
    color: var(--text-muted);
    padding: 0.4rem 0.9rem;
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    font-weight: 500;
    transition: background var(--transition), color var(--transition),
                border-color var(--transition);
}

.btn-secondary:hover {
    background: rgba(255,255,255,0.1);
    color: var(--text);
    border-color: var(--border-strong);
}

.btn-secondary:active {
    transform: scale(0.97);
}

/* =============================================
   Card Grid
   ============================================= */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
}

/* =============================================
   Base Card
   ============================================= */
.card {
    background: var(--card);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    padding: 1.1rem 1.1rem 0.9rem;
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    transition: background var(--transition), border-color var(--transition),
                transform var(--transition), box-shadow var(--transition);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    background: transparent;
    transition: background var(--transition);
}

.card:hover {
    background: var(--card-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.card-top {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 0.5rem;
}

.card-icon {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    background: rgba(255,255,255,0.06);
    transition: background var(--transition);
}

.card-icon svg {
    width: 18px;
    height: 18px;
}

.card-body { flex: 1; min-width: 0; }

.card-name {
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: 0.15rem;
}

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

/* =============================================
   Light Cards
   ============================================= */
.light-card.state-on {
    border-color: rgba(251, 191, 36, 0.3);
    background: linear-gradient(135deg, var(--card) 60%, var(--light-on-glow));
}

.light-card.state-on::before {
    background: linear-gradient(90deg, var(--light-on), transparent);
}

.light-card.state-on .card-icon {
    background: rgba(251, 191, 36, 0.15);
    color: var(--light-on);
}

.light-card.state-on .card-state { color: var(--light-on); }

.light-card.state-off .card-icon { color: var(--text-dim); }

.toggle-btn {
    width: 100%;
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-sm);
    padding: 0.45rem;
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    transition: background var(--transition), color var(--transition),
                border-color var(--transition), transform 0.1s;
}

.toggle-btn:active { transform: scale(0.97); }

.toggle-btn.btn-on {
    background: rgba(251, 191, 36, 0.15);
    border-color: rgba(251, 191, 36, 0.4);
    color: var(--light-on);
}

.toggle-btn.btn-on:hover {
    background: rgba(251, 191, 36, 0.25);
}

.toggle-btn.btn-off {
    background: rgba(255,255,255,0.04);
    color: var(--text-muted);
}

.toggle-btn.btn-off:hover {
    background: rgba(255,255,255,0.08);
    color: var(--text);
}

.toggle-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    transform: none;
}

/* Brightness bar */
.brightness-bar {
    height: 3px;
    border-radius: 2px;
    background: rgba(255,255,255,0.08);
    overflow: hidden;
    margin-top: -0.2rem;
}

.brightness-bar-fill {
    height: 100%;
    background: var(--light-on);
    border-radius: 2px;
    transition: width 0.3s ease;
}

/* =============================================
   Cover Cards
   ============================================= */
.cover-card.state-open {
    border-color: rgba(56, 189, 248, 0.3);
    background: linear-gradient(135deg, var(--card) 60%, var(--cover-glow));
}

.cover-card.state-open::before {
    background: linear-gradient(90deg, var(--cover-open), transparent);
}

.cover-card.state-open .card-icon {
    background: rgba(56, 189, 248, 0.15);
    color: var(--cover-open);
}

.cover-card.state-opening .card-icon,
.cover-card.state-closing .card-icon {
    color: var(--warning);
}

.cover-card.state-closed .card-icon { color: var(--text-dim); }

/* Position bar */
.position-bar {
    height: 3px;
    border-radius: 2px;
    background: rgba(255,255,255,0.08);
    overflow: hidden;
    margin-top: -0.2rem;
}

.position-bar-fill {
    height: 100%;
    background: var(--cover-open);
    border-radius: 2px;
    transition: width 0.4s ease;
}

/* Cover controls */
.cover-controls {
    display: flex;
    gap: 0.4rem;
}

.cover-btn {
    flex: 1;
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    padding: 0.5rem 0.3rem;
    font-size: 0.9rem;
    font-weight: 700;
    transition: background var(--transition), color var(--transition),
                border-color var(--transition), transform 0.1s;
}

.cover-btn:hover {
    background: rgba(255,255,255,0.1);
    color: var(--text);
    border-color: var(--border-strong);
}

.cover-btn:active { transform: scale(0.95); }

.cover-btn.btn-up:hover   { color: var(--success); border-color: rgba(16,185,129,0.4); }
.cover-btn.btn-stop:hover { color: var(--warning); border-color: rgba(245,158,11,0.4); }
.cover-btn.btn-down:hover { color: var(--error);   border-color: rgba(239,68,68,0.4); }

/* =============================================
   Overview / Stats
   ============================================= */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.stat-card {
    background: var(--card);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    padding: 1.25rem 1.1rem;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
    transition: background var(--transition), transform var(--transition);
}

.stat-card:hover {
    background: var(--card-hover);
    transform: translateY(-1px);
}

.stat-icon {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255,255,255,0.06);
}

.stat-icon svg { width: 16px; height: 16px; }

.stat-icon--lights  { background: rgba(251,191,36,0.12); color: var(--light-on); }
.stat-icon--covers  { background: rgba(56,189,248,0.12); color: var(--cover-open); }
.stat-icon--connection { background: rgba(99,102,241,0.12); color: var(--accent); }

.stat-value {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--text);
    letter-spacing: -0.02em;
    line-height: 1;
}

.stat-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 500;
}

/* Overview entity list */
#overview-entity-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 0.5rem;
}

.overview-row {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 0.6rem 1rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.82rem;
}

.overview-row-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
    background: var(--text-dim);
}

.overview-row-dot.on    { background: var(--light-on); box-shadow: 0 0 6px var(--light-on); }
.overview-row-dot.open  { background: var(--cover-open); }
.overview-row-dot.closed{ background: var(--text-dim); }

.overview-row-name { flex: 1; color: var(--text); font-weight: 500; }
.overview-row-state { color: var(--text-muted); }

/* =============================================
   Loading Skeletons
   ============================================= */
.skeleton-card {
    background: var(--card);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    height: 150px;
    animation: shimmer 1.6s ease-in-out infinite;
    position: relative;
    overflow: hidden;
}

.skeleton-card::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, transparent 0%, rgba(255,255,255,0.04) 50%, transparent 100%);
    transform: translateX(-100%);
    animation: sweep 1.6s ease-in-out infinite;
}

@keyframes shimmer { 0%,100% { opacity: 0.6; } 50% { opacity: 1; } }
@keyframes sweep { to { transform: translateX(100%); } }

/* =============================================
   Empty / Error States
   ============================================= */
.empty-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: 3rem 1rem;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.empty-state svg {
    width: 40px;
    height: 40px;
    margin: 0 auto 0.75rem;
    display: block;
    opacity: 0.3;
}

.error-banner {
    background: rgba(239,68,68,0.1);
    border: 1px solid rgba(239,68,68,0.3);
    color: #fca5a5;
    padding: 0.75rem 1rem;
    border-radius: var(--radius-sm);
    font-size: 0.82rem;
    margin-bottom: 1rem;
}

/* =============================================
   Responsive
   ============================================= */
@media (max-width: 600px) {
    .header-inner { padding: 0 1rem; }
    main { padding: 1rem 1rem 3rem; }
    .tab-nav { padding: 0 0.25rem; overflow-x: auto; scrollbar-width: none; }
    .tab-nav::-webkit-scrollbar { display: none; }
    .tab-btn { padding: 0.85rem 0.85rem; font-size: 0.82rem; }
    .card-grid { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 0.75rem; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .section-header { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 380px) {
    .card-grid { grid-template-columns: 1fr 1fr; }
    .stats-grid { grid-template-columns: 1fr; }
}

/* =============================================
   Login Page
   ============================================= */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.25rem;
    background: var(--bg-secondary);
}

.login-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2rem 2rem 2.25rem;
    width: 100%;
    max-width: 360px;
    box-shadow: var(--shadow);
}

.login-logo {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.4rem;
    margin-bottom: 1.75rem;
    text-align: center;
}

.login-logo svg {
    width: 42px;
    height: 42px;
    color: var(--accent);
    margin-bottom: 0.25rem;
}

.login-logo h1 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text);
    letter-spacing: -0.01em;
}

.login-logo p {
    font-size: 0.78rem;
    color: var(--text-muted);
}

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

.form-label {
    display: block;
    font-size: 0.78rem;
    font-weight: 500;
    color: var(--text-muted);
    margin-bottom: 0.35rem;
    letter-spacing: 0.01em;
}

.form-input {
    width: 100%;
    background: var(--bg);
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-sm);
    color: var(--text);
    padding: 0.6rem 0.85rem;
    font-size: 0.9rem;
    font-family: inherit;
    outline: none;
    transition: border-color var(--transition), box-shadow var(--transition);
}

.form-input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-input::placeholder { color: var(--text-dim); }

.btn-primary {
    width: 100%;
    background: var(--accent);
    border: none;
    border-radius: var(--radius-sm);
    color: #fff;
    padding: 0.65rem 1rem;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    margin-top: 0.5rem;
    letter-spacing: 0.01em;
    transition: background var(--transition), transform 0.1s;
}

.btn-primary:hover  { background: var(--accent-hover); }
.btn-primary:active { transform: scale(0.98); }

/* =============================================
   Auth Header (User info + Logout)
   ============================================= */
.header-right {
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.header-user {
    display: flex;
    align-items: center;
    gap: 0.45rem;
    font-size: 0.8rem;
    color: var(--text-muted);
}

.role-badge {
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    padding: 0.15rem 0.5rem;
    border-radius: 20px;
}

.role-badge--admin {
    background: rgba(99,102,241,0.15);
    color: var(--accent);
    border: 1px solid rgba(99,102,241,0.35);
}

.role-badge--viewer {
    background: rgba(148,163,184,0.1);
    color: var(--text-muted);
    border: 1px solid var(--border);
}

.btn-logout {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    background: rgba(255,255,255,0.04);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    padding: 0.3rem 0.65rem;
    font-size: 0.75rem;
    font-weight: 500;
    text-decoration: none;
    transition: background var(--transition), color var(--transition),
                border-color var(--transition);
}

.btn-logout:hover {
    background: rgba(239,68,68,0.1);
    border-color: rgba(239,68,68,0.35);
    color: #fca5a5;
}

/* =============================================
   Viewer-Modus: Aktions-Buttons sperren
   ============================================= */
[data-role="viewer"] .toggle-btn,
[data-role="viewer"] .cover-btn,
[data-role="viewer"] #btn-all-off,
[data-role="viewer"] #btn-covers-up,
[data-role="viewer"] #btn-covers-down {
    opacity: 0.35;
    cursor: not-allowed;
    pointer-events: none;
}

.viewer-notice {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(99,102,241,0.07);
    border: 1px solid rgba(99,102,241,0.2);
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    font-size: 0.78rem;
    padding: 0.55rem 0.9rem;
    margin-bottom: 1.25rem;
}

.viewer-notice svg {
    width: 15px;
    height: 15px;
    flex-shrink: 0;
    color: var(--accent);
    opacity: 0.7;
}

@media (max-width: 400px) {
    .login-card { padding: 1.5rem 1.25rem 1.75rem; }
    .header-user span:first-child { display: none; }
}