/* ====================================
   TEDxImScience Game - Global Styles
   ==================================== */

:root {
    /* TEDx Brand Colors */
    --tedx-red: #E62B1E;
    --tedx-black: #000000;
    --tedx-white: #FFFFFF;
    --tedx-gray: #333333;
    --tedx-light-gray: #F5F5F5;
    
    /* Dark Mode Colors */
    --bg-color: var(--tedx-white);
    --text-color: var(--tedx-black);
    --secondary-text: #666666;
    --border-color: #E0E0E0;
    --shadow: rgba(0, 0, 0, 0.1);
}

body.dark-mode {
    --bg-color: #1a1a1a;
    --text-color: var(--tedx-white);
    --secondary-text: #cccccc;
    --border-color: #333333;
    --shadow: rgba(255, 255, 255, 0.1);
    --tedx-light-gray: #2a2a2a;
}

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

body {
    font-family: 'Montserrat', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    overflow: hidden;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* ====================================
   Rotate Device Prompt (Mobile Portrait Only)
   ==================================== */

.rotate-prompt {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: var(--tedx-black);
    z-index: 9999;
    align-items: center;
    justify-content: center;
    flex-direction: column;
}

.rotate-content {
    text-align: center;
    padding: 2rem;
    color: var(--tedx-white);
}

.rotate-icon {
    font-size: 4rem;
    margin-bottom: 1.5rem;
    animation: rotateAnimation 2s ease-in-out infinite;
}

@keyframes rotateAnimation {
    0%, 100% {
        transform: rotate(0deg);
    }
    50% {
        transform: rotate(90deg);
    }
}

.rotate-content h2 {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--tedx-red);
    margin-bottom: 1rem;
}

.rotate-content p {
    font-size: 1rem;
    color: var(--tedx-white);
    opacity: 0.9;
}

/* Show rotate prompt only on mobile portrait mode */
@media (max-width: 768px) and (orientation: portrait) {
    .rotate-prompt {
        display: flex !important;
    }
    
    body {
        overflow: hidden;
    }
}

/* ====================================
   Screen Management
   ==================================== */

.screen {
    display: none;
    width: 100vw;
    height: 100vh;
    position: fixed;
    top: 0;
    left: 0;
    align-items: center;
    justify-content: center;
}

.screen.active {
    display: flex;
}

/* ====================================
   Loading Screen
   ==================================== */

#loading-screen {
    background-color: var(--tedx-white);
    flex-direction: column;
}

.loading-content {
    text-align: center;
}

.loading-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 2rem;
    animation: fadeInUp 1s ease;
}

.tedx-text {
    color: var(--tedx-black);
}

.science-text {
    color: var(--tedx-red);
}

.loading-animation {
    margin: 2rem 0;
}

.spinner {
    width: 60px;
    height: 60px;
    margin: 0 auto;
    border: 4px solid var(--tedx-light-gray);
    border-top: 4px solid var(--tedx-red);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.progress-bar {
    width: 300px;
    height: 4px;
    background-color: var(--tedx-light-gray);
    border-radius: 2px;
    overflow: hidden;
    margin: 2rem auto 0;
}

.progress-fill {
    height: 100%;
    background-color: var(--tedx-red);
    border-radius: 2px;
    animation: progress 2s ease-in-out;
    width: 100%;
}

@keyframes progress {
    0% { width: 0%; }
    100% { width: 100%; }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ====================================
   Login Screen
   ==================================== */

#login-screen {
    background-color: var(--bg-color);
}

.login-container {
    background-color: var(--bg-color);
    padding: 3rem;
    border-radius: 20px;
    box-shadow: 0 10px 40px var(--shadow);
    max-width: 500px;
    width: 90%;
    animation: fadeInScale 0.5s ease;
}

@keyframes fadeInScale {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.login-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 0.5rem;
}

.login-subtitle {
    text-align: center;
    color: var(--secondary-text);
    margin-bottom: 2rem;
    font-size: 0.95rem;
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-color);
}

.form-group input {
    padding: 0.9rem;
    border: 2px solid var(--border-color);
    border-radius: 10px;
    font-family: 'Montserrat', sans-serif;
    font-size: 0.95rem;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
    background-color: var(--bg-color);
    color: var(--text-color);
}

.form-group input:focus {
    outline: none;
    border-color: var(--tedx-red);
    box-shadow: 0 0 0 3px rgba(230, 43, 30, 0.1);
}

/* ====================================
   Buttons
   ==================================== */

.btn {
    padding: 0.9rem 2rem;
    border: none;
    border-radius: 30px;
    font-family: 'Montserrat', sans-serif;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    min-height: 44px;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
    user-select: none;
    -webkit-user-select: none;
}

.btn-primary {
    background-color: var(--tedx-red);
    color: var(--tedx-white);
    box-shadow: 0 4px 15px rgba(230, 43, 30, 0.3);
}

.btn-primary:hover {
    background-color: #c92419;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(230, 43, 30, 0.4);
}

.btn-primary:active {
    transform: translateY(0);
    box-shadow: 0 2px 8px rgba(230, 43, 30, 0.3);
}

.btn-primary:disabled {
    background-color: #ccc;
    cursor: not-allowed;
    transform: none;
}

.btn-secondary {
    background-color: var(--tedx-black);
    color: var(--tedx-white);
}

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

.btn-secondary:active {
    transform: translateY(0);
    background-color: #555;
}

.btn-logout {
    background-color: transparent;
    color: var(--text-color);
    border: 2px solid var(--border-color);
}

.btn-logout:hover {
    background-color: var(--tedx-light-gray);
    border-color: var(--tedx-red);
    transform: translateY(-2px);
}

.btn-logout:active {
    transform: translateY(0);
    background-color: var(--border-color);
}

.btn-logout:hover {
    background-color: var(--tedx-light-gray);
    border-color: var(--tedx-red);
    color: var(--tedx-red);
}

/* ====================================
   Game Screen
   ==================================== */

#game-screen {
    flex-direction: column;
    background-color: var(--bg-color);
    padding: 0;
    justify-content: flex-start;
}

.game-header {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    padding: 1rem 2rem;
    margin-bottom: 0;
    background-color: var(--bg-color);
    z-index: 100;
    gap: 3rem;
}

.player-info {
    font-weight: 600;
    font-size: 1rem;
    color: var(--text-color);
}

.score-info,
.high-score-info {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.score-label {
    font-weight: 600;
    color: var(--secondary-text);
    font-size: 0.85rem;
}

#current-score,
#high-score {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--tedx-red);
    min-width: 60px;
    text-align: left;
}

#game-canvas {
    background-color: var(--bg-color);
    width: 100vw;
    display: block;
    flex: 1;
    touch-action: none;
    -webkit-tap-highlight-color: transparent;
    user-select: none;
    -webkit-user-select: none;
}

.controls-info {
    padding: 0.5rem;
    text-align: center;
    color: var(--secondary-text);
    font-size: 0.85rem;
    background-color: var(--bg-color);
    width: 100%;
}

.mobile-controls {
    display: none;
}

.desktop-controls {
    display: block;
}

.controls-info kbd {
    background-color: var(--tedx-light-gray);
    padding: 0.3rem 0.6rem;
    border-radius: 5px;
    border: 1px solid var(--border-color);
    font-family: 'Montserrat', monospace;
    font-weight: 600;
    color: var(--text-color);
}

/* Dark Mode Toggle */
.dark-mode-btn {
    position: fixed;
    top: 1rem;
    right: 1rem;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    border: 2px solid var(--border-color);
    background-color: var(--bg-color);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    transition: all 0.3s ease;
    z-index: 1001;
}

.dark-mode-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 4px 15px var(--shadow);
}

body:not(.dark-mode) .moon-icon {
    display: none;
}

body.dark-mode .sun-icon {
    display: none;
}

#logout-btn {
    position: fixed;
    top: 1rem;
    left: 1rem;
    z-index: 1001;
    padding: 0.7rem 1.5rem;
    font-size: 0.9rem;
}

/* ====================================
   Modals
   ==================================== */

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(5px);
    z-index: 2000;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.3s ease;
}

.modal.active {
    display: flex;
}

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

.modal-content {
    background-color: var(--bg-color);
    padding: 3rem;
    border-radius: 20px;
    box-shadow: 0 10px 50px rgba(0, 0, 0, 0.3);
    max-width: 500px;
    width: 90%;
    text-align: center;
    animation: slideUp 0.3s ease;
    position: relative;
    overflow-y: auto;
    max-height: 90vh;
}

@keyframes slideUp {
    from {
        transform: translateY(50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.game-over-title,
.leaderboard-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--tedx-red);
}

.game-over-stats {
    margin: 2rem 0;
}

.final-score,
.high-score-display {
    font-size: 1.3rem;
    margin: 0.8rem 0;
    color: var(--text-color);
}

.final-score span,
.high-score-display span {
    font-weight: 700;
    color: var(--tedx-red);
    font-size: 1.8rem;
}

.new-record {
    display: none;
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--tedx-red);
    margin-top: 1rem;
    animation: pulse 0.5s ease infinite alternate;
}

.new-record.show {
    display: block;
}

@keyframes pulse {
    from { transform: scale(1); }
    to { transform: scale(1.05); }
}

.modal-buttons {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-top: 2rem;
}

.modal-buttons .btn {
    min-height: 48px;
    width: 100%;
    cursor: pointer;
    -webkit-tap-highlight-color: rgba(230, 43, 30, 0.2);
    touch-action: manipulation;
}

/* ====================================
   Leaderboard
   ==================================== */

.leaderboard-content {
    max-width: 600px;
}

.leaderboard-list {
    max-height: 400px;
    overflow-y: auto;
    margin: 2rem 0;
}

.leaderboard-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem;
    background-color: var(--tedx-light-gray);
    border-radius: 10px;
    margin-bottom: 0.8rem;
    transition: transform 0.2s ease;
}

.leaderboard-item:hover {
    transform: translateX(5px);
}

.leaderboard-item.top-1 {
    background: linear-gradient(135deg, #FFD700 0%, #FFA500 100%);
    color: var(--tedx-black);
}

.leaderboard-item.top-2 {
    background: linear-gradient(135deg, #C0C0C0 0%, #A9A9A9 100%);
    color: var(--tedx-black);
}

.leaderboard-item.top-3 {
    background: linear-gradient(135deg, #CD7F32 0%, #8B4513 100%);
    color: var(--tedx-white);
}

.leaderboard-rank {
    font-size: 1.5rem;
    font-weight: 700;
    width: 40px;
}

.leaderboard-info {
    flex: 1;
    text-align: left;
    padding: 0 1rem;
}

.leaderboard-name {
    font-weight: 600;
    font-size: 1.1rem;
}

.leaderboard-details {
    font-size: 0.85rem;
    color: var(--secondary-text);
    margin-top: 0.2rem;
}

.leaderboard-score {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--tedx-red);
}

/* ====================================
   Loading Spinner
   ==================================== */

.loading-spinner {
    display: none;
    width: 30px;
    height: 30px;
    border: 3px solid var(--tedx-light-gray);
    border-top: 3px solid var(--tedx-red);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 1rem auto;
}

.loading-spinner.active {
    display: block;
}

/* ====================================
   Responsive Design
   ==================================== */

@media (max-width: 768px) {
    .loading-title {
        font-size: 2.5rem;
    }

    .login-container {
        padding: 1.5rem;
        max-height: 90vh;
        overflow-y: auto;
    }

    .login-title {
        font-size: 2rem;
    }

    .login-subtitle {
        margin-bottom: 1.5rem;
    }

    .login-form {
        gap: 1rem;
    }

    .form-group {
        gap: 0.4rem;
    }

    .form-group input {
        padding: 0.75rem;
        font-size: 0.9rem;
    }

    .game-header {
        flex-wrap: nowrap;
        gap: 1rem;
        padding: 0.6rem 0.8rem;
    }

    .player-info {
        font-size: 0.85rem;
        flex-shrink: 1;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }

    #current-score,
    #high-score {
        font-size: 1.2rem;
    }

    .score-label {
        font-size: 0.75rem;
    }

    .modal-content {
        padding: 2rem;
        width: 95%;
        max-height: 90vh;
        overflow-y: auto;
    }

    .game-over-title,
    .leaderboard-title {
        font-size: 2rem;
    }

    #logout-btn {
        top: 0.5rem;
        left: 0.5rem;
        padding: 0.5rem 1rem;
        font-size: 0.8rem;
    }

    .dark-mode-btn {
        top: 0.5rem;
        right: 0.5rem;
        width: 40px;
        height: 40px;
        font-size: 1.2rem;
    }

    .controls-info {
        font-size: 0.7rem;
        padding: 0.3rem;
    }

    .desktop-controls {
        display: none;
    }

    .mobile-controls {
        display: block;
    }
}

@media (max-width: 480px) {
    .loading-title {
        font-size: 2rem;
    }

    .login-container {
        padding: 1rem;
        max-height: 95vh;
    }

    .login-title {
        font-size: 1.5rem;
        margin-bottom: 0.3rem;
    }

    .login-subtitle {
        font-size: 0.85rem;
        margin-bottom: 1rem;
    }

    .login-form {
        gap: 0.8rem;
    }

    .form-group {
        gap: 0.3rem;
    }

    .form-group label {
        font-size: 0.85rem;
    }

    .form-group input {
        padding: 0.65rem;
        font-size: 0.85rem;
    }

    .modal-buttons {
        gap: 1rem;
    }

    .modal-buttons .btn {
        min-height: 50px;
        font-size: 1rem;
    }

    .btn {
        padding: 0.9rem 1.5rem;
        font-size: 0.95rem;
        min-height: 48px;
    }

    #logout-btn {
        padding: 0.5rem 1rem;
        font-size: 0.75rem;
        left: 0.3rem;
        top: 0.3rem;
        min-height: 40px;
    }

    .dark-mode-btn {
        width: 44px;
        height: 44px;
        font-size: 1.1rem;
        top: 0.3rem;
        right: 0.3rem;
    }

    .game-header {
        padding: 0.4rem 0.5rem;
        gap: 0.5rem;
    }

    .player-info {
        font-size: 0.7rem;
        max-width: 100px;
    }

    .score-info,
    .high-score-info {
        gap: 0.3rem;
    }

    #current-score,
    #high-score {
        font-size: 1rem;
        min-width: 50px;
    }

    .score-label {
        font-size: 0.65rem;
    }

    .controls-info {
        font-size: 0.65rem;
        padding: 0.25rem;
    }

    .modal-content {
        padding: 1.5rem;
    }

    .game-over-title,
    .leaderboard-title {
        font-size: 1.5rem;
    }
}

/* ====================================
   Accessibility
   ==================================== */

:focus-visible {
    outline: 3px solid var(--tedx-red);
    outline-offset: 2px;
}

button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Reduce motion for users who prefer it */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}