/* Morse Code Translator - Retro Telegraph Aesthetic */

:root {
    --bg-primary: #1a1510;
    --bg-secondary: #2d2418;
    --bg-tertiary: #3d3220;
    --text-primary: #d4c4a8;
    --text-secondary: #a89070;
    --accent-gold: #c9a227;
    --accent-copper: #b87333;
    --accent-green: #4a7c59;
    --flash-on: #ffeb3b;
    --flash-off: #3d3220;
    --border-color: #5a4a32;
    --shadow-color: rgba(0, 0, 0, 0.5);
}

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

body {
    font-family: 'Courier New', Courier, monospace;
    background: linear-gradient(135deg, var(--bg-primary) 0%, #0f0c08 100%);
    color: var(--text-primary);
    min-height: 100vh;
    padding: 20px;
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(201, 162, 39, 0.03) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(184, 115, 51, 0.03) 0%, transparent 50%);
}

.container {
    max-width: 800px;
    margin: 0 auto;
    background: var(--bg-secondary);
    border: 3px solid var(--border-color);
    border-radius: 8px;
    box-shadow: 
        0 0 30px var(--shadow-color),
        inset 0 0 60px rgba(0, 0, 0, 0.3);
    position: relative;
    overflow: hidden;
}

.container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        repeating-linear-gradient(
            0deg,
            transparent,
            transparent 2px,
            rgba(0, 0, 0, 0.03) 2px,
            rgba(0, 0, 0, 0.03) 4px
        );
    pointer-events: none;
}

/* Header */
header {
    text-align: center;
    padding: 30px 20px;
    background: linear-gradient(180deg, var(--bg-tertiary) 0%, var(--bg-secondary) 100%);
    border-bottom: 2px solid var(--border-color);
    position: relative;
}

.telegraph-icon {
    font-size: 3rem;
    margin-bottom: 10px;
    text-shadow: 0 0 20px var(--accent-gold);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 0.8; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.05); }
}

h1 {
    font-size: 1.8rem;
    letter-spacing: 4px;
    color: var(--accent-gold);
    text-shadow: 2px 2px 4px var(--shadow-color);
    margin-bottom: 5px;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 0.9rem;
    letter-spacing: 2px;
}

/* Main Content */
.main-content {
    padding: 25px;
}

/* Mode Toggle */
.mode-toggle {
    display: flex;
    gap: 10px;
    margin-bottom: 25px;
    flex-wrap: wrap;
}

.mode-btn {
    flex: 1;
    min-width: 120px;
    padding: 12px 20px;
    background: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    color: var(--text-secondary);
    font-family: inherit;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.3s ease;
    border-radius: 4px;
    letter-spacing: 1px;
}

.mode-btn:hover {
    background: var(--bg-secondary);
    border-color: var(--accent-copper);
    color: var(--text-primary);
}

.mode-btn.active {
    background: var(--accent-copper);
    border-color: var(--accent-gold);
    color: var(--bg-primary);
    font-weight: bold;
}

/* Panels */
.panel {
    display: none;
    animation: fadeIn 0.3s ease;
}

.panel.active {
    display: block;
}

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

/* Input/Output Sections */
.input-section,
.output-section {
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 8px;
    color: var(--accent-gold);
    font-weight: bold;
    letter-spacing: 1px;
    font-size: 0.9rem;
}

textarea {
    width: 100%;
    padding: 15px;
    background: var(--bg-primary);
    border: 2px solid var(--border-color);
    border-radius: 4px;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 1rem;
    resize: vertical;
    transition: border-color 0.3s ease;
}

textarea:focus {
    outline: none;
    border-color: var(--accent-copper);
    box-shadow: 0 0 10px rgba(184, 115, 51, 0.2);
}

.output-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.icon-btn {
    padding: 6px 12px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: 4px;
    font-size: 0.85rem;
    transition: all 0.2s ease;
}

.icon-btn:hover {
    background: var(--accent-copper);
    color: var(--bg-primary);
}

.morse-display,
.text-display {
    min-height: 80px;
    padding: 15px;
    background: var(--bg-primary);
    border: 2px solid var(--border-color);
    border-radius: 4px;
    font-size: 1.3rem;
    line-height: 1.8;
    word-wrap: break-word;
    font-family: 'Courier New', monospace;
    letter-spacing: 2px;
}

.morse-display {
    color: var(--accent-gold);
}

.text-display {
    color: var(--text-primary);
}

/* Morse Input Hints */
.morse-input-hint {
    color: var(--text-secondary);
    font-size: 0.8rem;
    margin-bottom: 8px;
    font-style: italic;
}

.morse-keyboard {
    display: flex;
    gap: 10px;
    margin-top: 10px;
    flex-wrap: wrap;
}

.key-btn {
    padding: 10px 20px;
    background: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 1rem;
    cursor: pointer;
    border-radius: 4px;
    transition: all 0.2s ease;
}

.key-btn:hover {
    background: var(--accent-copper);
    border-color: var(--accent-gold);
}

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

/* Common Phrases */
.phrases-section {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.phrase-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 10px;
}

.phrase-btn {
    padding: 8px 16px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-family: inherit;
    font-size: 0.85rem;
    cursor: pointer;
    border-radius: 4px;
    transition: all 0.2s ease;
    letter-spacing: 1px;
}

.phrase-btn:hover {
    background: var(--accent-green);
    border-color: var(--accent-gold);
    color: var(--text-primary);
}

/* Playback Controls */
.playback-controls {
    display: flex;
    align-items: center;
    gap: 20px;
    margin: 25px 0;
    padding: 20px;
    background: var(--bg-tertiary);
    border-radius: 8px;
    border: 2px solid var(--border-color);
    flex-wrap: wrap;
}

.control-group {
    flex: 1;
    min-width: 200px;
}

.control-group label {
    margin-bottom: 10px;
}

input[type="range"] {
    width: 100%;
    height: 8px;
    background: var(--bg-primary);
    border-radius: 4px;
    outline: none;
    -webkit-appearance: none;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    background: var(--accent-copper);
    border-radius: 50%;
    cursor: pointer;
    border: 2px solid var(--accent-gold);
}

input[type="range"]::-moz-range-thumb {
    width: 20px;
    height: 20px;
    background: var(--accent-copper);
    border-radius: 50%;
    cursor: pointer;
    border: 2px solid var(--accent-gold);
}

.play-btn,
.stop-btn {
    padding: 12px 30px;
    font-family: inherit;
    font-size: 1rem;
    cursor: pointer;
    border-radius: 4px;
    transition: all 0.2s ease;
    border: 2px solid;
}

.play-btn {
    background: var(--accent-green);
    border-color: #5a9a6a;
    color: var(--text-primary);
}

.play-btn:hover {
    background: #5a9a6a;
    box-shadow: 0 0 15px rgba(74, 124, 89, 0.4);
}

.play-btn.large {
    padding: 15px 40px;
    font-size: 1.1rem;
}

.stop-btn {
    background: #8b3a3a;
    border-color: #a04545;
    color: var(--text-primary);
}

.stop-btn:hover {
    background: #a04545;
}

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

/* Visual Indicator */
.visual-section {
    text-align: center;
    margin: 25px 0;
}

.visual-indicator {
    width: 100px;
    height: 100px;
    margin: 15px auto;
    background: var(--flash-off);
    border: 4px solid var(--border-color);
    border-radius: 50%;
    box-shadow: 
        inset 0 0 20px rgba(0, 0, 0, 0.5),
        0 0 0 4px var(--bg-tertiary);
    transition: all 0.05s ease;
    position: relative;
}

.visual-indicator::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 60%;
    height: 60%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.3) 0%, transparent 70%);
    border-radius: 50%;
}

.visual-indicator.active {
    background: var(--flash-on);
    box-shadow: 
        inset 0 0 30px rgba(255, 255, 255, 0.5),
        0 0 30px var(--flash-on),
        0 0 60px var(--flash-on),
        0 0 0 4px var(--bg-tertiary);
}

/* Practice Mode */
.practice-container {
    text-align: center;
}

.practice-stats {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-bottom: 20px;
    font-size: 1.1rem;
}

.practice-stats span {
    color: var(--text-secondary);
}

.practice-stats span span {
    color: var(--accent-gold);
    font-weight: bold;
}

.practice-display {
    margin: 30px 0;
}

.practice-morse-code {
    font-size: 3rem;
    color: var(--accent-gold);
    letter-spacing: 8px;
    margin-bottom: 20px;
    min-height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.answer-options {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 15px;
    margin-top: 20px;
}

.answer-btn {
    width: 60px;
    height: 60px;
    font-size: 1.5rem;
    font-family: inherit;
    background: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    color: var(--text-primary);
    cursor: pointer;
    border-radius: 8px;
    transition: all 0.2s ease;
}

.answer-btn:hover {
    background: var(--accent-copper);
    border-color: var(--accent-gold);
    transform: scale(1.05);
}

.answer-btn.correct {
    background: var(--accent-green);
    border-color: #5a9a6a;
    animation: correctPulse 0.5s ease;
}

.answer-btn.wrong {
    background: #8b3a3a;
    border-color: #a04545;
    animation: shake 0.5s ease;
}

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

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-10px); }
    75% { transform: translateX(10px); }
}

.practice-feedback {
    margin-top: 20px;
    font-size: 1.2rem;
    min-height: 30px;
}

.practice-feedback.correct {
    color: var(--accent-green);
}

.practice-feedback.wrong {
    color: #c95a5a;
}

/* Reference Chart */
.reference-section {
    margin-top: 30px;
    padding-top: 25px;
    border-top: 2px solid var(--border-color);
}

.reference-section h3 {
    color: var(--accent-gold);
    margin-bottom: 15px;
    text-align: center;
    letter-spacing: 2px;
}

.morse-chart {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: 10px;
}

.chart-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.chart-item:hover {
    background: var(--bg-secondary);
    border-color: var(--accent-copper);
}

.chart-char {
    font-weight: bold;
    color: var(--accent-gold);
    font-size: 1.1rem;
}

.chart-morse {
    color: var(--text-secondary);
    font-family: monospace;
    letter-spacing: 2px;
}

/* Footer */
footer {
    text-align: center;
    padding: 20px;
    background: var(--bg-tertiary);
    border-top: 2px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.85rem;
    letter-spacing: 2px;
}

/* Responsive */
@media (max-width: 600px) {
    h1 {
        font-size: 1.3rem;
    }
    
    .mode-toggle {
        flex-direction: column;
    }
    
    .mode-btn {
        width: 100%;
    }
    
    .playback-controls {
        flex-direction: column;
        align-items: stretch;
    }
    
    .morse-chart {
        grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
    }
    
    .practice-morse-code {
        font-size: 2rem;
    }
    
    .answer-btn {
        width: 50px;
        height: 50px;
        font-size: 1.2rem;
    }
}

/* Playing state animations */
.morse-display .playing {
    color: var(--flash-on);
    text-shadow: 0 0 10px var(--flash-on);
}