/* CSS Variables for consistent theming */
:root {
    --primary-color: #4a90d9;
    --secondary-color: #6c5ce7;
    --accent-color: #00b894;
    --kitchen-color: #e17055;
    --drawing-color: #6c5ce7;
    --bedroom-color: #0984e3;
    --background-color: #f8f9fa;
    --card-background: #ffffff;
    --text-primary: #2d3436;
    --text-secondary: #636e72;
    --shadow-light: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-medium: 0 8px 15px rgba(0, 0, 0, 0.15);
    --border-radius: 16px;
    --transition-speed: 0.3s;
}

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: var(--text-primary);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* Header Styles */
header {
    text-align: center;
    padding: 40px 20px;
    color: white;
}

header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
}

header .subtitle {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* ============================================
   HOME PAGE STYLES
   ============================================ */

.home-page {
    display: block;
}

.home-page.hidden {
    display: none;
}

/* Room Slider Section */
.room-slider {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    padding: 20px;
}

.slider-btn {
    background: white;
    border: none;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.5rem;
    color: var(--primary-color);
    box-shadow: var(--shadow-light);
    transition: all var(--transition-speed);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.slider-btn:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-medium);
    background: var(--primary-color);
    color: white;
}

.rooms-container {
    display: flex;
    overflow: hidden;
    scroll-behavior: smooth;
    gap: 20px;
    padding: 10px;
}

.room-card {
    background: var(--card-background);
    border-radius: var(--border-radius);
    padding: 30px;
    min-width: 280px;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-speed);
    box-shadow: var(--shadow-light);
}

.room-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-medium);
}

.room-card.active {
    border: 3px solid var(--accent-color);
}

.room-image {
    width: 120px;
    height: 120px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, #ffecd2 0%, #fcb69f 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.room-placeholder {
    font-size: 4rem;
}

.room-card h2 {
    color: var(--text-primary);
    font-size: 1.5rem;
    margin-bottom: 8px;
}

.room-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* Slider Indicators */
.slider-indicators {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 20px;
}

.indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    cursor: pointer;
    transition: all var(--transition-speed);
}

.indicator.active {
    background: white;
    transform: scale(1.2);
}

/* ============================================
   ROOM PAGE STYLES
   ============================================ */

.room-page {
    display: none;
}

.room-page.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Room Navigation Tabs */
.room-nav {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 30px;
    flex-wrap: wrap;
}

.room-tab {
    display: flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.9);
    border: 2px solid transparent;
    padding: 12px 24px;
    border-radius: 50px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-primary);
    transition: all var(--transition-speed);
    box-shadow: var(--shadow-light);
}

.room-tab:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.room-tab.active {
    background: white;
    border-color: var(--accent-color);
    box-shadow: var(--shadow-medium);
}

.room-tab[data-room="kitchen"].active {
    border-color: var(--kitchen-color);
    background: linear-gradient(135deg, #fff 0%, #fff5f2 100%);
}

.room-tab[data-room="drawing-room"].active {
    border-color: var(--drawing-color);
    background: linear-gradient(135deg, #fff 0%, #f5f0ff 100%);
}

.room-tab[data-room="bedroom"].active {
    border-color: var(--bedroom-color);
    background: linear-gradient(135deg, #fff 0%, #f0f8ff 100%);
}

.tab-icon {
    font-size: 1.3rem;
}

.tab-name {
    font-weight: 600;
}

/* Items Content */
.items-content {
    background: var(--card-background);
    border-radius: var(--border-radius);
    padding: 30px;
    box-shadow: var(--shadow-light);
}

.items-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    flex-wrap: wrap;
    gap: 15px;
}

.back-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 12px 20px;
    border-radius: 25px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    transition: all var(--transition-speed);
    box-shadow: var(--shadow-light);
}

.back-btn:hover {
    transform: translateX(-5px);
    box-shadow: var(--shadow-medium);
}

.back-icon {
    font-size: 1.2rem;
}

.items-header h2 {
    color: var(--text-primary);
    font-size: 1.8rem;
    text-align: right;
}

/* Items Grid */
.items-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 25px;
}

.item-card {
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    border-radius: var(--border-radius);
    padding: 20px;
    text-align: center;
    transition: all var(--transition-speed);
    cursor: pointer;
}

.item-card:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-medium);
}

.item-card:active {
    transform: scale(0.98);
}

.item-image {
    width: 100px;
    height: 100px;
    margin: 0 auto 15px;
    background: white;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    box-shadow: var(--shadow-light);
}

.item-card h3 {
    color: var(--text-primary);
    font-size: 1.1rem;
    margin-bottom: 5px;
}

.item-card .pronunciation {
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-style: italic;
}

/* Room-specific color themes */
.room-page[data-current-room="kitchen"] .items-content {
    border-top: 4px solid var(--kitchen-color);
}

.room-page[data-current-room="drawing-room"] .items-content {
    border-top: 4px solid var(--drawing-color);
}

.room-page[data-current-room="bedroom"] .items-content {
    border-top: 4px solid var(--bedroom-color);
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

@media (max-width: 768px) {
    header h1 {
        font-size: 1.8rem;
    }

    header .subtitle {
        font-size: 0.95rem;
    }

    .room-slider {
        flex-direction: column;
    }

    .slider-btn {
        display: none;
    }

    .rooms-container {
        width: 100%;
        overflow-x: auto;
        scroll-snap-type: x mandatory;
        -webkit-overflow-scrolling: touch;
        padding: 10px 5px;
    }

    .room-card {
        min-width: 85%;
        scroll-snap-align: center;
        padding: 25px 20px;
    }

    .room-image {
        width: 100px;
        height: 100px;
    }

    .room-placeholder {
        font-size: 3rem;
    }

    /* Room page responsive */
    .room-nav {
        gap: 8px;
    }

    .room-tab {
        padding: 10px 16px;
        font-size: 0.9rem;
    }

    .tab-icon {
        font-size: 1.1rem;
    }

    .items-content {
        padding: 20px;
    }

    .items-header {
        flex-direction: column;
        text-align: center;
        gap: 15px;
    }

    .items-header h2 {
        font-size: 1.5rem;
        text-align: center;
        order: -1;
    }

    .back-btn {
        width: 100%;
        justify-content: center;
    }

    .items-grid {
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
        gap: 15px;
    }

    .item-card {
        padding: 15px;
    }

    .item-image {
        width: 80px;
        height: 80px;
        font-size: 2.5rem;
    }

    .item-card h3 {
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 10px;
    }

    header {
        padding: 25px 15px;
    }

    header h1 {
        font-size: 1.5rem;
    }

    .room-card {
        min-width: 90%;
        padding: 20px 15px;
    }

    .room-card h2 {
        font-size: 1.3rem;
    }

    /* Room tabs stack on very small screens */
    .room-nav {
        flex-direction: column;
        align-items: stretch;
    }

    .room-tab {
        justify-content: center;
    }

    .items-content {
        padding: 15px;
    }

    .items-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }

    .item-card {
        padding: 12px;
    }

    .item-image {
        width: 70px;
        height: 70px;
        font-size: 2rem;
        margin-bottom: 10px;
    }

    .item-card h3 {
        font-size: 0.9rem;
    }

    .item-card .pronunciation {
        font-size: 0.75rem;
    }
}

/* Touch-friendly improvements for mobile */
@media (hover: none) {
    .room-card:hover,
    .item-card:hover,
    .slider-btn:hover,
    .room-tab:hover,
    .back-btn:hover {
        transform: none;
    }

    .room-card:active,
    .item-card:active {
        transform: scale(0.98);
    }
}