/* CSS Reset & Variables */
:root {
    --bg-color: hsl(240, 10%, 3.9%);
    --fg-color: hsl(0, 0%, 98%);
    --muted-color: hsl(240, 5%, 64.9%);
    --border-color: hsl(240, 3.7%, 15.9%);
    --card-color: hsl(240, 10%, 3.9%);
    
    --accent-on: hsl(45, 93%, 47%); /* Warm gold glow */
    --accent-off: hsl(240, 5.9%, 15%); /* Muted dark */
    
    --transition-speed: 0.25s;
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

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

body {
    background-color: var(--bg-color);
    color: var(--fg-color);
    font-family: var(--font-family);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow-x: hidden;
    line-height: 1.5;
}

/* Helpers */
.hidden {
    display: none !important;
}

/* Lock Screen Overlay */
.lock-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: var(--bg-color);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    padding: 2rem;
    text-align: center;
}

.lock-content {
    max-width: 420px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.25rem;
}

.lock-icon {
    width: 48px;
    height: 48px;
    stroke-width: 1.5px;
    color: var(--muted-color);
}

.lock-content h1 {
    font-size: 1.75rem;
    font-weight: 500;
    letter-spacing: -0.025em;
}

.lock-content p {
    color: var(--muted-color);
    font-size: 0.95rem;
}

.url-example {
    font-family: monospace;
    font-size: 0.8rem;
    background-color: hsl(240, 5.9%, 10%);
    padding: 0.5rem 0.75rem;
    color: var(--muted-color);
    word-break: break-all;
}

/* Dashboard Container */
.dashboard-container {
    width: 100%;
    max-width: 580px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    padding: 2.5rem 2rem;
    gap: 2.5rem;
}

@media (max-width: 480px) {
    .dashboard-container {
        padding: 1.5rem 1rem;
        gap: 2rem;
    }
}

/* Header */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.home-icon {
    width: 28px;
    height: 28px;
    color: var(--fg-color);
    stroke-width: 1.5px;
}

.header-info {
    display: flex;
    flex-direction: column;
}

.system-title {
    font-size: 0.75rem;
    color: var(--muted-color);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 500;
}

#device-name {
    font-size: 1.15rem;
    font-weight: 500;
    letter-spacing: -0.01em;
}

.badge {
    font-size: 0.75rem;
    font-weight: 500;
    padding: 0.25rem 0.5rem;
    letter-spacing: 0.02em;
    color: var(--muted-color);
    background-color: hsl(240, 5.9%, 10%);
}

.badge.online {
    color: hsl(142, 70%, 45%);
    background-color: hsl(142, 70%, 10%);
}

/* Central Power Control */
.power-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    margin: 2rem 0;
}

.power-button {
    width: 130px;
    height: 130px;
    border-radius: 50%;
    border: none;
    cursor: pointer;
    background-color: var(--accent-off);
    color: var(--fg-color);
    display: flex;
    justify-content: center;
    align-items: center;
    transition: background-color var(--transition-speed) ease, color var(--transition-speed) ease;
    outline: none;
}

.power-icon {
    width: 44px;
    height: 44px;
    stroke-width: 1.5px;
    transition: transform var(--transition-speed) ease;
}

.power-button:active .power-icon {
    transform: scale(0.9);
}

/* Power State Active */
.power-container.on .power-button {
    background-color: var(--accent-on);
    color: hsl(240, 10%, 3.9%);
}

.power-label {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--muted-color);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.power-container.on .power-label {
    color: var(--accent-on);
}

/* Tab Navigation */
.tab-nav {
    display: flex;
    border-bottom: 1px solid var(--border-color);
    width: 100%;
    gap: 1.5rem;
    margin-bottom: 1rem;
}

.tab-link {
    background: none;
    border: none;
    color: var(--muted-color);
    font-size: 0.95rem;
    font-weight: 500;
    padding-bottom: 0.75rem;
    cursor: pointer;
    position: relative;
    transition: color var(--transition-speed) ease;
}

.tab-link:hover {
    color: var(--fg-color);
}

.tab-link.active {
    color: var(--fg-color);
}

.tab-link.active::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--fg-color);
}

/* Tab Content */
.tab-content {
    display: none;
    flex-direction: column;
    gap: 2rem;
    width: 100%;
}

.tab-content.active {
    display: flex;
}

/* Control Elements */
.control-group {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    width: 100%;
}

.control-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.95rem;
    font-weight: 500;
}

.control-header label {
    color: var(--muted-color);
}

.temp-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    color: var(--muted-color);
    margin-top: -0.25rem;
}

/* Styled Range Input (Slider) */
input[type="range"] {
    -webkit-appearance: none;
    width: 100%;
    height: 6px;
    background: hsl(240, 5.9%, 15%);
    border-radius: 3px;
    outline: none;
    margin: 10px 0;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--fg-color);
    cursor: pointer;
    transition: transform 0.1s ease;
}

input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.15);
}

input[type="range"]::-webkit-slider-thumb:active {
    transform: scale(0.9);
}

/* Color Presets */
.color-presets {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 0.5rem;
    width: 100%;
}

.preset-btn {
    height: 48px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0;
    transition: opacity var(--transition-speed) ease, transform 0.1s ease;
}

.preset-btn:hover {
    opacity: 0.9;
}

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

/* Custom Color Picker */
.inline-group {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
}

.inline-group label {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--muted-color);
}

.color-picker-wrapper {
    width: 48px;
    height: 48px;
    border-radius: 4px;
    overflow: hidden;
    position: relative;
    border: 1px solid var(--border-color);
}

input[type="color"] {
    position: absolute;
    top: -5px;
    left: -5px;
    width: 58px;
    height: 58px;
    border: none;
    background: none;
    cursor: pointer;
}

/* Info List */
.info-list {
    display: flex;
    flex-direction: column;
    border-top: 1px solid var(--border-color);
}

.info-item {
    display: flex;
    justify-content: space-between;
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.95rem;
}

.info-label {
    color: var(--muted-color);
}

.info-value {
    font-weight: 500;
}

/* Sub-power buttons in tabs */
.sub-power-btn {
    background-color: var(--accent-off);
    color: var(--fg-color);
    border: none;
    padding: 0.4rem 0.85rem;
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    border-radius: 4px;
    transition: background-color var(--transition-speed) ease, color var(--transition-speed) ease;
    text-transform: uppercase;
    letter-spacing: 0.02em;
}

.sub-power-btn.on {
    background-color: var(--accent-on);
    color: hsl(240, 10%, 3.9%);
}

/* Presets Tab Styles */
.save-preset-wrapper {
    display: flex;
    gap: 0.5rem;
    width: 100%;
}

#preset-name-input {
    flex: 1;
    background-color: hsl(240, 5.9%, 10%);
    border: 1px solid var(--border-color);
    color: var(--fg-color);
    padding: 0.5rem 0.75rem;
    border-radius: 4px;
    font-family: var(--font-family);
    outline: none;
    font-size: 0.9rem;
}

#preset-name-input:focus {
    border-color: var(--muted-color);
}

.save-btn {
    background-color: var(--fg-color);
    color: var(--bg-color);
    border: none;
    padding: 0.5rem 1rem;
    font-weight: 500;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: opacity var(--transition-speed) ease;
}

.save-btn:hover {
    opacity: 0.9;
}

.presets-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    width: 100%;
    margin-top: 0.5rem;
}

.preset-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: hsl(240, 5.9%, 8%);
    padding: 0.75rem 1rem;
    border-radius: 4px;
    border: 1px solid var(--border-color);
}

.preset-info-btn {
    background: none;
    border: none;
    color: var(--fg-color);
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    text-align: left;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
}

.preset-details {
    font-size: 0.75rem;
    color: var(--muted-color);
    font-weight: 400;
}

.delete-preset-btn {
    background: none;
    border: none;
    color: hsl(0, 72%, 51%);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.25rem;
    opacity: 0.7;
    transition: opacity var(--transition-speed) ease;
}

.delete-preset-btn:hover {
    opacity: 1;
}

.control-label-simple {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--muted-color);
}