/* ============================================================================
   WORD GUESS - MAIN STYLESHEET
   Dark Mode First, 2026 UI/UX Trends
   ============================================================================ */

/* Skip to main content link for accessibility */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--color-primary, #4a90d9);
    color: #fff;
    padding: 8px 16px;
    z-index: 10000;
    font-size: 14px;
    border-radius: 0 0 4px 0;
    transition: top 0.2s;
}
.skip-link:focus {
    top: 0;
}

:root {
    --color-primary: #27ae60;
    --color-correct: #27ae60;
    --color-present: #f39c12;
    --color-absent: #1a1a2e;
    --color-bg: #0f0f23;
    --color-bg-secondary: #1a1a2e;
    --color-bg-tertiary: #2d2d44;
    --color-text: #f0f0f0;
    --color-text-secondary: #b0b0b0;
    --color-border: #3d3d54;
    --color-error: #e74c3c;

    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;

    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 12px 24px rgba(0, 0, 0, 0.3);

    --transition-fast: 150ms ease-out;
    --transition-normal: 300ms ease-out;
    --transition-slow: 500ms ease-out;

    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
}

/* App Loader */
.app-loader {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: var(--color-bg, #0f0f23);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.3s;
}
.app-loader.hidden {
    opacity: 0;
    pointer-events: none;
}
.loader-spinner {
    width: 40px; height: 40px;
    border: 3px solid rgba(255,255,255,0.1);
    border-top-color: #27ae60;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Light Mode */
body.light-mode,
[data-theme="light"] {
    --color-bg: #f5f5fa;
    --color-bg-secondary: #ffffff;
    --color-bg-tertiary: #f0f0f0;
    --color-text: #1a1a2e;
    --color-text-secondary: #5a5a70;
    --color-border: #d0d0d8;
}

[data-theme="light"] body {
    background: linear-gradient(135deg, #f5f5fa 0%, #ffffff 100%);
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background: linear-gradient(135deg, #0f0f23 0%, #1a1a2e 100%);
    color: var(--color-text);
    line-height: 1.6;
    min-height: 100vh;
    transition: background var(--transition-normal);
    overflow-x: hidden;
}

body.light-mode {
    background: linear-gradient(135deg, #ffffff 0%, #f5f5f5 100%);
}

/* ============================================================================
   NAVBAR
   ============================================================================ */

.navbar {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(15, 15, 35, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    padding: 0.75rem 0;
}

body.light-mode .navbar {
    background: rgba(255, 255, 255, 0.95);
}

.navbar-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 800px;
    margin: 0 auto;
    padding: 0 1rem;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 0.5px;
    color: var(--color-primary);
    text-shadow: 0 2px 8px rgba(39, 174, 96, 0.2);
}

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

.icon-btn {
    background: transparent;
    border: none;
    color: var(--color-text);
    font-size: 1.25rem;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 44px;
    min-height: 44px;
}

.icon-btn:hover {
    background: var(--color-bg-secondary);
    transform: scale(1.05);
}

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

/* ============================================================================
   MODALS
   ============================================================================ */

.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    padding: 1rem;
    animation: fadeIn var(--transition-normal);
}

.modal.hidden {
    display: none;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.modal-content {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    max-width: 90vw;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
    animation: slideUp var(--transition-normal);
}

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

.modal-content.result-modal {
    max-width: 400px;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    border-bottom: 1px solid var(--color-border);
}

.modal-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
}

.close-btn {
    background: transparent;
    border: none;
    color: var(--color-text);
    font-size: 1.75rem;
    cursor: pointer;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.close-btn:hover {
    background: var(--color-bg-tertiary);
}

.modal-body {
    padding: 1.5rem;
}

.modal-footer {
    display: flex;
    gap: 1rem;
    padding: 1.5rem;
    border-top: 1px solid var(--color-border);
    flex-wrap: wrap;
}

/* Settings Modal */
.setting-item {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.setting-item label {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    font-size: 1rem;
}

.setting-checkbox {
    width: 20px;
    height: 20px;
    cursor: pointer;
    accent-color: var(--color-primary);
}

.setting-desc {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    margin-left: 2.25rem;
}

/* Statistics Modal */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    margin-bottom: 2rem;
}

@media (min-width: 480px) {
    .stats-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.stat-box {
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 1rem;
    text-align: center;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-primary);
}

.stat-label {
    font-size: 0.75rem;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-top: 0.5rem;
}

.guess-distribution {
    margin-top: 2rem;
}

.guess-distribution h3 {
    margin-bottom: 1rem;
    font-size: 1rem;
}

.distribution-chart {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.distribution-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.distribution-label {
    min-width: 30px;
    font-weight: 600;
    color: var(--color-text-secondary);
}

.distribution-bar {
    flex: 1;
    height: 24px;
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.distribution-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-primary), var(--color-correct));
    border-radius: var(--radius-sm);
    transition: width var(--transition-normal);
}

.distribution-count {
    min-width: 40px;
    text-align: right;
    font-weight: 600;
}

/* Language Menu */
.lang-menu {
    position: absolute;
    top: 55px;
    right: 10px;
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.5rem;
    padding: 0.5rem;
    z-index: 999;
    min-width: 280px;
    box-shadow: var(--shadow-lg);
}

.lang-menu.hidden {
    display: none;
}

.lang-option {
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    color: var(--color-text);
    padding: 0.75rem;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 0.9rem;
    transition: all var(--transition-fast);
    text-align: left;
}

.lang-option:hover {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

.lang-option.active {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

/* About Modal */
.about-content {
    line-height: 1.8;
}

.about-content h3 {
    margin-top: 1.5rem;
    margin-bottom: 1rem;
    color: var(--color-primary);
}

.about-content ul {
    margin-left: 1.5rem;
    margin-bottom: 1rem;
}

.about-content li {
    margin-bottom: 0.5rem;
    color: var(--color-text-secondary);
}

/* Result Modal */
.result-content {
    text-align: center;
}

.result-content h2 {
    font-size: 1.75rem;
    margin-bottom: 0.5rem;
}

.result-content p {
    color: var(--color-text-secondary);
    margin-bottom: 1.5rem;
}

.result-stats {
    text-align: left;
    margin-bottom: 1.5rem;
}

.result-stat {
    display: flex;
    justify-content: space-between;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--color-border);
}

.result-stat:last-child {
    border-bottom: none;
}

.result-stat-label {
    color: var(--color-text-secondary);
}

.result-stat-value {
    font-weight: 700;
    color: var(--color-primary);
}

/* ============================================================================
   BUTTONS
   ============================================================================ */

.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex: 1;
}

.btn-primary {
    background: var(--color-primary);
    color: white;
}

.btn-primary:hover {
    background: #229954;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-secondary {
    background: var(--color-bg-tertiary);
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    background: var(--color-border);
    transform: translateY(-2px);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.hint-btn {
    width: 100%;
    margin: 1rem 0;
}

/* ============================================================================
   GAME CONTAINER
   ============================================================================ */

.game-container {
    max-width: 500px;
    margin: 2rem auto;
    padding: 0 1rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.mode-toggle {
    display: flex;
    gap: 0.5rem;
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 0.25rem;
}

.mode-btn {
    flex: 1;
    padding: 0.75rem;
    background: transparent;
    border: none;
    color: var(--color-text-secondary);
    font-weight: 600;
    cursor: pointer;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.mode-btn.active {
    background: var(--color-primary);
    color: white;
}

.mode-btn:hover {
    color: var(--color-text);
}

/* Game Info */
.game-info {
    text-align: center;
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

.daily-counter {
    margin: 0.5rem 0;
}

.daily-counter.hidden {
    display: none;
}

.timer {
    display: block;
    margin-top: 0.5rem;
    font-weight: 600;
    color: var(--color-primary);
}

/* ============================================================================
   GAME BOARD
   ============================================================================ */

.game-board {
    display: flex;
    justify-content: center;
    margin: 1rem 0;
}

.tiles-container {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 0.5rem;
    perspective: 1000px;
    max-width: 350px;
    width: 100%;
}

.tile {
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-secondary);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 2rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--color-text);
    cursor: default;
    transition: all var(--transition-fast);
    white-space: nowrap;
    overflow: hidden;
}

.tile.active {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 2px rgba(39, 174, 96, 0.2);
}

.tile.filled {
    animation: pop var(--transition-fast);
}

@keyframes pop {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.1);
    }
}

.tile.flip {
    animation: flip var(--transition-slow);
}

@keyframes flip {
    0% {
        transform: rotateX(0);
    }
    50% {
        transform: rotateX(90deg);
    }
    100% {
        transform: rotateX(0);
    }
}

.tile.correct {
    background: var(--color-correct);
    border-color: var(--color-correct);
    color: white;
}

.tile.present {
    background: var(--color-present);
    border-color: var(--color-present);
    color: white;
}

.tile.absent {
    background: var(--color-absent);
    border-color: var(--color-absent);
    color: var(--color-text-secondary);
}

@media (max-width: 480px) {
    .tile {
        font-size: 1.5rem;
    }
}

/* ============================================================================
   KEYBOARD
   ============================================================================ */

.keyboard-container {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.virtual-keyboard {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.keyboard-row {
    display: flex;
    justify-content: center;
    gap: 0.3rem;
    flex-wrap: wrap;
}

.key-btn {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    color: var(--color-text);
    padding: 0.6rem 0.8rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    font-size: 0.875rem;
    text-transform: uppercase;
    transition: all var(--transition-fast);
    user-select: none;
    min-height: 44px;
    min-width: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex: 1;
    max-width: 40px;
}

.keyboard-row:nth-child(1) .key-btn {
    flex-basis: calc(10% - 0.25rem);
}

.keyboard-row:nth-child(2) .key-btn {
    flex-basis: calc(10% - 0.25rem);
}

.keyboard-row:nth-child(3) .key-btn {
    flex-basis: calc(10% - 0.25rem);
}

.key-btn:hover {
    background: var(--color-bg-tertiary);
    transform: translateY(-2px);
}

.key-btn:active {
    transform: translateY(0);
}

.key-btn.special-key {
    flex: 1;
    max-width: 100%;
    min-width: auto;
}

.key-btn.correct {
    background: var(--color-correct);
    border-color: var(--color-correct);
    color: white;
}

.key-btn.present {
    background: var(--color-present);
    border-color: var(--color-present);
    color: white;
}

.key-btn.absent {
    background: var(--color-absent);
    border-color: var(--color-absent);
    color: var(--color-text-secondary);
}

.keyboard-buttons {
    display: flex;
    gap: 0.5rem;
}

#backspace-btn span:first-child {
    margin-right: 0.25rem;
}

/* ============================================================================
   HINT SYSTEM
   ============================================================================ */

.hint-container {
    text-align: center;
    margin: 1rem 0;
}

.hint-text {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 1rem;
    margin-top: 0.75rem;
    color: var(--color-text-secondary);
    font-style: italic;
}

.hint-text.hidden {
    display: none;
}

.loading {
    opacity: 0.6;
    pointer-events: none;
}

/* ============================================================================
   ERROR MESSAGE
   ============================================================================ */

.error-message {
    background: var(--color-error);
    color: white;
    padding: 1rem;
    border-radius: var(--radius-md);
    text-align: center;
    font-weight: 600;
    animation: slideDown var(--transition-fast);
}

.error-message.hidden {
    display: none;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ============================================================================
   AD CONTAINERS
   ============================================================================ */

.ad-container {
    max-width: 800px;
    margin: 1rem auto;
    padding: 0 1rem;
}

.ad-top {
    margin-top: 1rem;
}

.ad-bottom {
    margin-bottom: 2rem;
}

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

@media (max-width: 600px) {
    :root {
        font-size: 14px;
    }

    .navbar-content {
        padding: 0 0.75rem;
    }

    .logo {
        font-size: 1.25rem;
    }

    .game-container {
        margin: 1rem auto;
        gap: 1rem;
    }

    .modal-content {
        max-width: 95vw;
        max-height: 95vh;
    }

    .modal-header {
        padding: 1rem;
    }

    .modal-body {
        padding: 1rem;
    }

    .modal-footer {
        flex-direction: column;
        padding: 1rem;
    }

    .btn {
        width: 100%;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .lang-menu {
        right: 0;
        left: 0;
        margin: 0 0.5rem;
        grid-template-columns: repeat(3, 1fr);
    }
}

/* ============================================================================
   ACCESSIBILITY
   ============================================================================ */

@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

@media (prefers-color-scheme: light) {
    body:not(.light-mode) {
        --color-bg: #ffffff;
        --color-bg-secondary: #f5f5f5;
        --color-bg-tertiary: #ebebeb;
        --color-text: #1a1a2e;
        --color-text-secondary: #4d4d5c;
        --color-border: #d0d0d8;
    }
}

/* Focus styles for keyboard navigation */
button:focus-visible,
input:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* High contrast mode */
@media (prefers-contrast: more) {
    .key-btn {
        border-width: 2px;
    }

    .tile {
        border-width: 3px;
    }
}

/* ============================================================================
   PRINT STYLES
   ============================================================================ */

@media print {
    .navbar,
    .modal,
    .keyboard-container,
    .ad-container {
        display: none;
    }
}

/* ============================================================================
   ANIMATION TOGGLE (disabled by user preference)
   ============================================================================ */

body.no-animations * {
    animation: none !important;
    transition: none !important;
}