:root {
    --tg-theme-bg-color: #ffffff;
    --tg-theme-text-color: #000000;
    --tg-theme-hint-color: #999999;
    --tg-theme-link-color: #2481cc;
    --tg-theme-button-color: #2481cc;
    --tg-theme-button-text-color: #ffffff;
    --tg-theme-secondary-bg-color: #f4f4f5;
    --card-bg: #ffffff;
    --card-border: #e5e5e5;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    --radius: 16px;
    --radius-sm: 12px;
    --transition: all 0.2s ease;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--tg-theme-secondary-bg-color);
    color: var(--tg-theme-text-color);
    line-height: 1.5;
    overflow-x: hidden;
}
.app { min-height: 100vh; padding-bottom: 80px; }
.header {
    background: linear-gradient(135deg, var(--tg-theme-button-color), #1a6db3);
    color: white;
    padding: 24px 20px 20px;
    text-align: center;
}
.header-icon { font-size: 40px; margin-bottom: 8px; }
.header h1 { font-size: 24px; font-weight: 700; }
.header .subtitle { font-size: 14px; opacity: 0.9; }
.loading { display: flex; flex-direction: column; align-items: center; padding: 60px 20px; gap: 16px; }
.spinner { width: 40px; height: 40px; border: 4px solid var(--card-border); border-top-color: var(--tg-theme-button-color); border-radius: 50%; animation: spin 0.8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.hidden { display: none !important; }
.content { padding: 0 12px 12px; }

/* Bottom Navigation */
.bottom-nav {
    display: flex;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--card-bg);
    border-top: 1px solid var(--card-border);
    padding: 8px 0;
    padding-bottom: max(8px, env(safe-area-inset-bottom));
    z-index: 100;
}
.nav-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 8px;
    background: none;
    border: none;
    color: var(--tg-theme-hint-color);
    font-size: 11px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}
.nav-item.active { color: var(--tg-theme-button-color); }
.nav-icon { font-size: 22px; }

/* Sections */
.section { display: none; padding-top: 12px; padding-bottom: 70px; }
.section.active { display: block; animation: fadeIn 0.3s ease; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

/* Status Cards */
.status-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-bottom: 16px; }
.status-card {
    background: var(--card-bg);
    border-radius: var(--radius-sm);
    padding: 14px;
    display: flex;
    align-items: center;
    gap: 12px;
    box-shadow: var(--shadow);
}
.status-card.power { border-left: 4px solid #ffc107; }
.status-card.alert { border-left: 4px solid #dc3545; }
.status-card.power.on { border-left-color: #28a745; }
.status-card.alert.active { background: #fff5f5; border-left-color: #dc3545; }
.status-icon { font-size: 28px; }
.status-info { display: flex; flex-direction: column; }
.status-label { font-size: 12px; color: var(--tg-theme-hint-color); }
.status-value { font-size: 14px; font-weight: 600; }

/* Categories */
.category { margin-bottom: 20px; }
.category-title { font-size: 14px; font-weight: 600; color: var(--tg-theme-hint-color); margin-bottom: 10px; padding-left: 4px; }

/* Service Grid */
.service-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; }
.service-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 14px 8px;
    background: var(--card-bg);
    border: none;
    border-radius: var(--radius-sm);
    font-size: 11px;
    font-weight: 500;
    color: var(--tg-theme-text-color);
    cursor: pointer;
    box-shadow: var(--shadow);
    transition: var(--transition);
}
.service-btn:active { transform: scale(0.95); }
.service-icon { font-size: 26px; }

/* Tabs */
.tabs { display: flex; gap: 8px; margin-bottom: 16px; }
.tab {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 12px;
    background: var(--card-bg);
    border: 2px solid transparent;
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-weight: 600;
    color: var(--tg-theme-hint-color);
    cursor: pointer;
    box-shadow: var(--shadow);
    transition: var(--transition);
}
.tab.active { color: var(--tg-theme-button-color); border-color: var(--tg-theme-button-color); background: rgba(36, 129, 204, 0.08); }
.tab-icon { font-size: 18px; }
.tab-content { display: none; }
.tab-content.active { display: block; }

/* Cards */
.card {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 16px;
    margin-bottom: 10px;
    box-shadow: var(--shadow);
}
.card-header { display: flex; align-items: center; gap: 12px; }
.card-icon { font-size: 28px; }
.card-header > div { flex: 1; }
.card-header h3 { font-size: 15px; font-weight: 600; }
.card-header .hint { font-size: 12px; color: var(--tg-theme-hint-color); }

/* Input */
.input-group { margin-top: 12px; }
.input {
    width: 100%;
    padding: 12px;
    font-size: 15px;
    border: 2px solid var(--card-border);
    border-radius: 8px;
    background: var(--tg-theme-secondary-bg-color);
    color: var(--tg-theme-text-color);
    outline: none;
    transition: var(--transition);
}
.input:focus { border-color: var(--tg-theme-button-color); background: var(--card-bg); }

/* Select */
.select {
    padding: 8px 12px;
    font-size: 15px;
    font-weight: 600;
    border: 2px solid var(--card-border);
    border-radius: 8px;
    background: var(--tg-theme-secondary-bg-color);
    color: var(--tg-theme-text-color);
    cursor: pointer;
    outline: none;
}
.subgroup-selector { margin-top: 12px; }
.subgroup-row { display: flex; align-items: center; gap: 10px; }
.subgroup-label { font-size: 14px; color: var(--tg-theme-hint-color); }
.subgroup-dot { font-size: 20px; font-weight: bold; color: var(--tg-theme-hint-color); }
.dtek-preview { margin-top: 10px; padding: 8px 12px; background: linear-gradient(135deg, #ffecd2, #fcb69f); border-radius: 8px; font-size: 13px; font-weight: 600; color: #8b4513; }

/* Radio */
.radio-group { display: flex; gap: 10px; margin-top: 12px; }
.radio-card { flex: 1; cursor: pointer; }
.radio-card input { display: none; }
.radio-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 12px;
    border: 2px solid var(--card-border);
    border-radius: var(--radius-sm);
    text-align: center;
    transition: var(--transition);
}
.radio-icon { font-size: 24px; }
.radio-content strong { font-size: 13px; }
.radio-card input:checked + .radio-content { border-color: var(--tg-theme-button-color); background: rgba(36, 129, 204, 0.08); }

/* Switch */
.switch { position: relative; width: 48px; height: 28px; flex-shrink: 0; }
.switch input { opacity: 0; width: 0; height: 0; }
.slider {
    position: absolute;
    cursor: pointer;
    inset: 0;
    background: #ccc;
    border-radius: 28px;
    transition: var(--transition);
}
.slider::before {
    content: '';
    position: absolute;
    height: 22px;
    width: 22px;
    left: 3px;
    bottom: 3px;
    background: white;
    border-radius: 50%;
    transition: var(--transition);
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}
.switch input:checked + .slider { background: var(--tg-theme-button-color); }
.switch input:checked + .slider::before { transform: translateX(20px); }

/* Modal */
.modal {
    position: fixed;
    inset: 0;
    background: var(--tg-theme-secondary-bg-color);
    z-index: 200;
    overflow-y: auto;
}
.modal-content { min-height: 100vh; }
.modal-header {
    display: flex;
    align-items: center;
    padding: 16px;
    background: var(--card-bg);
    border-bottom: 1px solid var(--card-border);
    position: sticky;
    top: 0;
    z-index: 10;
}
.modal-back {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--tg-theme-secondary-bg-color);
    border: none;
    border-radius: 50%;
    font-size: 20px;
    cursor: pointer;
}
.modal-header h2 { flex: 1; text-align: center; font-size: 17px; }
.modal-spacer { width: 36px; }
.modal-body { padding: 16px; }

/* Save Button */
.save-container {
    position: fixed;
    bottom: 70px;
    left: 0;
    right: 0;
    padding: 12px 16px;
    background: linear-gradient(to top, var(--tg-theme-secondary-bg-color), transparent);
    padding-top: 30px;
    z-index: 50;
}
.save-btn {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px;
    font-size: 16px;
    font-weight: 600;
    color: var(--tg-theme-button-text-color);
    background: linear-gradient(135deg, var(--tg-theme-button-color), #1a6db3);
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    box-shadow: 0 4px 16px rgba(36, 129, 204, 0.4);
}

/* Toast */
.toast {
    position: fixed;
    bottom: 140px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 20px;
    background: #4caf50;
    color: white;
    border-radius: 24px;
    font-size: 14px;
    font-weight: 600;
    box-shadow: 0 4px 16px rgba(76, 175, 80, 0.4);
    opacity: 0;
    transition: all 0.3s ease;
    z-index: 1000;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* Dark Theme */
@media (prefers-color-scheme: dark) {
    :root { --card-bg: #1c1c1e; --card-border: #38383a; }
}
body.dark-theme { --card-bg: #1c1c1e; --card-border: #38383a; }

/* Tab Buttons */
.tab-btn {
    padding: 10px 16px;
    background: var(--tg-theme-secondary-bg-color);
    border: none;
    border-radius: 10px;
    font-weight: 600;
    font-size: 13px;
    cursor: pointer;
    transition: var(--transition);
}
.tab-btn.active {
    background: var(--tg-theme-button-color);
    color: white;
}

/* Category Buttons */
.cat-btn {
    padding: 8px 10px;
    background: var(--tg-theme-secondary-bg-color);
    border: none;
    border-radius: 8px;
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}
.cat-btn.active {
    background: var(--tg-theme-button-color);
    color: white;
}

/* Genre Buttons */
.genre-btn {
    padding: 12px 8px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    border: none;
    border-radius: 10px;
    font-weight: 600;
    font-size: 12px;
    cursor: pointer;
    transition: var(--transition);
}
.genre-btn:hover {
    transform: scale(1.02);
}

/* Input Styles */
.input {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid var(--card-border);
    border-radius: 10px;
    font-size: 14px;
    background: var(--card-bg);
    transition: var(--transition);
}
.input:focus {
    outline: none;
    border-color: var(--tg-theme-button-color);
}

/* Hint Text */
.hint {
    font-size: 12px;
    color: var(--tg-theme-hint-color);
}