/* ===========================
   Modern Picture Labeling Game
   Contemporary Design System
   =========================== */

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

/* Light Mode (Default) */
:root,
[data-theme="light"] {
    /* Color Palette - Light Mode */
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --success-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --accent-gradient: linear-gradient(135deg, #fa709a 0%, #fee140 100%);

    --bg-primary: #f5f7fa;
    --bg-secondary: #ffffff;
    --bg-tertiary: #e8ecf1;

    --text-primary: #2d3748;
    --text-secondary: #718096;

    --border-color: #e2e8f0;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.16);
    --shadow-glow: 0 0 20px rgba(102, 126, 234, 0.3);

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 24px;

    --transition-fast: 0.2s ease;
    --transition-medium: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* Spacing */
    --spacing-xs: 8px;
    --spacing-sm: 12px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
}

/* Dark Mode */
[data-theme="dark"] {
    --bg-primary: #1a1a2e;
    --bg-secondary: #252541;
    --bg-tertiary: #2d2d50;

    --text-primary: #ffffff;
    --text-secondary: #b8b8d4;

    --border-color: rgba(255, 255, 255, 0.1);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.15);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.25);
    --shadow-glow: 0 0 20px rgba(102, 126, 234, 0.4);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    padding: var(--spacing-md) var(--spacing-sm) 0;
    transition: background var(--transition-medium), color var(--transition-medium);
}

[data-theme="dark"] body {
    background-image:
        radial-gradient(circle at 20% 30%, rgba(102, 126, 234, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(118, 75, 162, 0.1) 0%, transparent 50%);
}

/* Theme Toggle Button */
.theme-toggle-btn {
    position: fixed;
    top: var(--spacing-md);
    right: calc(var(--spacing-md) + 48px);
    z-index: 1000;
    width: 40px;
    height: 40px;
    border: none;
    border-radius: var(--radius-md);
    background: var(--secondary-gradient);
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-medium);
}

.theme-toggle-btn:hover {
    transform: scale(1.1) rotate(-5deg);
    box-shadow: var(--shadow-glow);
}

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

.theme-toggle-btn svg {
    width: 20px;
    height: 20px;
}

.sun-icon {
    display: none;
}

[data-theme="dark"] .sun-icon {
    display: block;
}

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

/* Fullscreen Button */
.fullscreen-btn {
    position: fixed;
    top: var(--spacing-md);
    right: var(--spacing-md);
    z-index: 1000;
    width: 40px;
    height: 40px;
    border: none;
    border-radius: var(--radius-md);
    background: var(--primary-gradient);
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-medium);
}

.fullscreen-btn:hover {
    transform: scale(1.1) rotate(5deg);
    box-shadow: var(--shadow-glow);
}

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

.fullscreen-btn svg {
    width: 20px;
    height: 20px;
}

.exit-fullscreen-icon {
    display: none;
}

.fullscreen-active .fullscreen-icon {
    display: none;
}

.fullscreen-active .exit-fullscreen-icon {
    display: block;
}

/* Game Container */
.game-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm) 0;
}

/* Header */
.game-header {
    text-align: center;
    margin-bottom: var(--spacing-md);
    animation: fadeInDown 0.6s ease;
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.game-title {
    font-family: 'Poppins', sans-serif;
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
}

.title-emoji {
    font-size: 1.2em;
    animation: bounce 2s infinite;
}

@keyframes bounce {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-10px);
    }
}

.game-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--text-secondary);
    font-weight: 500;
}

/* Game Board */
.game-board {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

/* Picture Grid */
.picture-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    animation: fadeIn 0.8s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

.picture-card {
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-sm);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    border: 2px solid transparent;
    transition: all var(--transition-medium);
    position: relative;
    overflow: hidden;
}

.picture-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--primary-gradient);
    opacity: 0;
    transition: opacity var(--transition-medium);
    z-index: 0;
}

.picture-card:hover::before {
    opacity: 0.05;
}

.picture-card>* {
    position: relative;
    z-index: 1;
}

.picture-card.drag-over {
    border-color: #667eea;
    background: rgba(102, 126, 234, 0.1);
    transform: scale(1.05);
    box-shadow: var(--shadow-glow);
}

.picture-card.correct {
    border-color: #00f2fe;
    background: rgba(0, 242, 254, 0.05);
    animation: successPulse 0.5s ease;
}

@keyframes successPulse {

    0%,
    100% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.05);
    }
}

.picture-card.incorrect {
    animation: shake 0.5s ease;
}

@keyframes shake {

    0%,
    100% {
        transform: translateX(0);
    }

    25% {
        transform: translateX(-10px);
    }

    75% {
        transform: translateX(10px);
    }
}

.picture-wrapper {
    width: 100%;
    aspect-ratio: 1;
    background: white;
    border-radius: var(--radius-md);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-sm);
}

.picture-image {
    width: 100%;
    height: 100%;
    background-image: url('images/podpisz.jpg');
    background-size: 1500% auto;
    background-repeat: no-repeat;
    transition: transform var(--transition-medium);
}

.picture-card:hover .picture-image {
    transform: scale(1.1);
}

.drop-zone {
    min-height: 44px;
    background: var(--bg-secondary);
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
    padding: var(--spacing-xs);
}

.drop-zone.has-label {
    background: var(--success-gradient);
    border-color: transparent;
    color: white;
    font-weight: 600;
    box-shadow: var(--shadow-sm);
}

/* Label Container */
.label-container {
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    animation: fadeIn 1s ease;
}

.labels-header {
    font-family: 'Poppins', sans-serif;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.labels-header svg {
    width: 24px;
    height: 24px;
    color: #667eea;
}

.label-grid {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    min-height: 48px;
}

.label-item {
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--primary-gradient);
    color: white;
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: grab;
    transition: all var(--transition-medium);
    box-shadow: var(--shadow-md);
    user-select: none;
    font-size: 1rem;
    line-height: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.label-item:hover {
    transform: translateY(-4px) scale(1.05);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.label-item:active {
    cursor: grabbing;
    transform: scale(0.95);
}

.label-item.dragging {
    opacity: 0.5;
    transform: rotate(5deg);
}

.label-item.placed {
    display: none;
}

/* Win Overlay */
.win-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(20px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 999;
    opacity: 1;
    transition: opacity 0.5s ease;
}

.win-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.win-content {
    text-align: center;
    padding: var(--spacing-xl);
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    max-width: 500px;
    margin: var(--spacing-md);
    position: relative;
    animation: scaleIn 0.5s ease;
    border: 2px solid var(--border-color);
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.8);
    }

    to {
        opacity: 1;
        transform: scale(1);
    }
}

.win-icon {
    font-size: 5rem;
    margin-bottom: var(--spacing-md);
    animation: winIconBounce 1s ease infinite;
}

@keyframes winIconBounce {

    0%,
    100% {
        transform: translateY(0) rotate(0deg);
    }

    25% {
        transform: translateY(-20px) rotate(-10deg);
    }

    75% {
        transform: translateY(-10px) rotate(10deg);
    }
}

.win-title {
    font-family: 'Poppins', sans-serif;
    font-size: 3rem;
    font-weight: 800;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-sm);
}

.win-message {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

/* Score Display */
.score-info {
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    border: 1px solid var(--border-color);
}

.score-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--border-color);
}

.score-row:last-child {
    border-bottom: none;
}

.score-row.total {
    margin-top: var(--spacing-sm);
    padding-top: var(--spacing-md);
    border-top: 2px solid var(--border-color);
    font-weight: 700;
}

.score-label {
    font-size: 1rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.score-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.correct-score {
    color: #00f2fe;
}

.incorrect-score {
    color: #f5576c;
}

.restart-btn {
    padding: var(--spacing-md) var(--spacing-xl);
    background: var(--primary-gradient);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-medium);
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    box-shadow: var(--shadow-md);
}

.restart-btn svg {
    width: 20px;
    height: 20px;
}

.restart-btn:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.restart-btn:active {
    transform: translateY(-2px);
}

/* Confetti Animation */
.confetti-container {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
    overflow: hidden;
    border-radius: var(--radius-xl);
}

.confetti {
    position: absolute;
    width: 10px;
    height: 10px;
    background: var(--primary-gradient);
    top: -10px;
    animation: confettiFall 3s linear infinite;
}

@keyframes confettiFall {
    to {
        transform: translateY(600px) rotate(360deg);
        opacity: 0;
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    body {
        padding: var(--spacing-sm) var(--spacing-xs) 0;
    }

    .picture-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-sm);
        padding: var(--spacing-sm);
    }

    .game-title {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .theme-toggle-btn,
    .fullscreen-btn {
        top: var(--spacing-sm);
        width: 34px;
        height: 34px;
    }

    .theme-toggle-btn {
        right: calc(var(--spacing-sm) + 42px);
    }

    .fullscreen-btn {
        right: var(--spacing-sm);
    }

    .theme-toggle-btn svg,
    .fullscreen-btn svg {
        width: 18px;
        height: 18px;
    }
}

@media (min-width: 769px) {
    .picture-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* Smooth transitions for all interactive elements */
button,
.label-item,
.picture-card {
    -webkit-tap-highlight-color: transparent;
}

/* Fullscreen optimization */
:fullscreen {
    background: var(--bg-primary);
}

::backdrop {
    background: var(--bg-primary);
}