/* Reset and Base Styles */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    -webkit-tap-highlight-color: transparent;
}

html, body {
    height: 100%;
    overflow: hidden;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: #1a1a2e;
    color: #ffffff;
    touch-action: manipulation;
}

#app {
    display: flex;
    flex-direction: column;
    height: 100vh;
    max-height: -webkit-fill-available;
    padding: 8px;
    gap: 8px;
}

/* Header */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 12px;
    background: #16213e;
    border-radius: 12px;
    flex-shrink: 0;
}

.header h1 {
    font-size: 1.2rem;
    font-weight: 700;
    color: #4cc9f0;
}

.header-controls {
    display: flex;
    gap: 8px;
}

.toggle-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 10px 14px;
    background: #2d3a5a;
    border: 2px solid #555;
    border-radius: 25px;
    color: #999;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.toggle-btn .toggle-icon,
.toggle-btn .toggle-text {
    pointer-events: none;
}

.toggle-btn.active {
    background: #4361ee;
    border-color: #4cc9f0;
    color: #ffffff;
}

.toggle-btn.listening {
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(76, 201, 240, 0.4); }
    50% { box-shadow: 0 0 0 10px rgba(76, 201, 240, 0); }
}

/* Message Area */
.message-section {
    flex-shrink: 0;
}

.message-area {
    background: #0f0f23;
    border: 2px solid #4361ee;
    border-radius: 12px;
    padding: 16px;
    min-height: 70px;
    font-size: 1.4rem;
    line-height: 1.4;
    margin-bottom: 8px;
}

.message-text {
    color: #ffffff;
    white-space: pre-wrap;
}

.cursor {
    color: #4cc9f0;
    animation: blink 1s infinite;
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

.message-controls {
    display: flex;
    gap: 8px;
}

.speak-btn {
    flex: 2;
    padding: 14px 20px;
    background: linear-gradient(135deg, #4361ee, #3a0ca3);
    border: none;
    border-radius: 12px;
    color: #ffffff;
    font-size: 1.1rem;
    font-weight: 700;
    cursor: pointer;
    transition: transform 0.1s, box-shadow 0.1s;
}

.speak-btn:active {
    transform: scale(0.98);
    box-shadow: 0 0 20px rgba(67, 97, 238, 0.5);
}

.control-btn {
    flex: 1;
    padding: 14px 12px;
    background: #2d3a5a;
    border: 2px solid #4361ee;
    border-radius: 12px;
    color: #ffffff;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.1s;
}

.control-btn:active {
    background: #4361ee;
    transform: scale(0.98);
}

/* Predictions Section */
.predictions-section {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 12px;
    overflow-y: auto;
    min-height: 0;
}

.prediction-group {
    flex-shrink: 0;
}

.prediction-label {
    font-size: 0.85rem;
    font-weight: 600;
    color: #8b8fa3;
    margin-bottom: 8px;
    padding-left: 4px;
}

/* Phrase Predictions */
.phrase-predictions {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.phrase-btn {
    width: 100%;
    padding: 22px 20px;
    background: linear-gradient(135deg, #16213e, #1a1a2e);
    border: 3px solid #4361ee;
    border-radius: 12px;
    color: #ffffff;
    font-size: 1.2rem;
    text-align: left;
    cursor: pointer;
    transition: all 0.15s;
    min-height: 65px;
}

.phrase-btn:active {
    background: #4361ee;
    transform: scale(0.99);
}

/* Word Predictions */
.word-predictions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.word-btn {
    flex: 1;
    min-width: 90px;
    min-height: 60px;
    padding: 18px 12px;
    background: #2d3a5a;
    border: 3px solid #7209b7;
    border-radius: 12px;
    color: #ffffff;
    font-size: 1.15rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s;
}

.word-btn:active {
    background: #7209b7;
    transform: scale(0.95);
}

/* Letter Predictions */
.letter-predictions {
    display: flex;
    gap: 10px;
}

.letter-btn {
    flex: 1;
    min-height: 60px;
    padding: 18px 12px;
    background: #2d3a5a;
    border: 3px solid #f72585;
    border-radius: 12px;
    color: #ffffff;
    font-size: 1.4rem;
    font-weight: 700;
    text-transform: lowercase;
    cursor: pointer;
    transition: all 0.15s;
}

.letter-btn:active {
    background: #f72585;
    transform: scale(0.95);
}

/* Keyboard Section */
.keyboard-section {
    flex-shrink: 0;
    padding-top: 8px;
}

.keyboard {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.keyboard-row {
    display: flex;
    justify-content: center;
    gap: 5px;
}

.key {
    min-width: 70px;
    height: 65px;
    background: linear-gradient(180deg, #3d4a6b, #2d3a5a);
    border: 1px solid #4361ee;
    border-radius: 8px;
    color: #ffffff;
    font-size: 1.2rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.1s;
    flex: 1;
    max-width: 80px;
}

.key:active {
    background: #4361ee;
    transform: translateY(2px);
}

.backspace-key {
    background: linear-gradient(180deg, #5a3a5a, #4a2a4a);
    border-color: #f72585;
}

.backspace-key:active {
    background: #f72585;
}

.space-key {
    flex: 2.5;
    max-width: 180px;
    background: linear-gradient(180deg, #3a5a4a, #2a4a3a);
    border-color: #4cc9f0;
}

.space-key:active {
    background: #4cc9f0;
    color: #1a1a2e;
}

/* Context Section */
.context-section {
    flex-shrink: 0;
    background: #16213e;
    border-radius: 12px;
    overflow: hidden;
    transition: max-height 0.3s;
}

.context-section.collapsed .context-content {
    display: none;
}

.context-toggle {
    width: 100%;
    padding: 12px 16px;
    background: transparent;
    border: none;
    color: #8b8fa3;
    font-size: 0.9rem;
    text-align: left;
    cursor: pointer;
}

.context-content {
    padding: 0 16px 12px;
}

#context-text {
    color: #b8c0d4;
    font-size: 0.95rem;
    line-height: 1.4;
    font-style: italic;
}

/* Floating Speak Button */
.floating-speak-btn {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 70px;
    height: 70px;
    border-radius: 50%;
    background: linear-gradient(135deg, #4361ee, #3a0ca3);
    border: 3px solid #4cc9f0;
    color: #ffffff;
    font-size: 2rem;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(67, 97, 238, 0.4);
    transition: transform 0.1s, box-shadow 0.1s;
    z-index: 100;
}

.floating-speak-btn:active {
    transform: scale(0.95);
    box-shadow: 0 2px 10px rgba(67, 97, 238, 0.6);
}

/* Loading State */
.predictions-section.loading {
    pointer-events: none;
}

.predictions-section.loading .phrase-btn,
.predictions-section.loading .word-btn,
.predictions-section.loading .letter-btn {
    opacity: 0.6;
}

/* Responsive adjustments for smaller tablets */
@media (max-height: 800px) {
    .message-area {
        min-height: 50px;
        padding: 12px;
    }

    .phrase-btn {
        padding: 10px 14px;
    }

    .key {
        height: 48px;
        min-width: 50px;
    }
}

/* Larger tablets / landscape */
@media (min-width: 1024px) {
    #app {
        max-width: 900px;
        margin: 0 auto;
    }

    .key {
        height: 70px;
        font-size: 1.3rem;
    }
}

/* Password Gate */
.password-gate {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: #1a1a2e;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.password-box {
    background: #16213e;
    padding: 40px;
    border-radius: 16px;
    text-align: center;
    border: 2px solid #4361ee;
    max-width: 90%;
    width: 350px;
}

.password-box h2 {
    color: #4cc9f0;
    margin-bottom: 10px;
    font-size: 1.5rem;
}

.password-box p {
    color: #8b8fa3;
    margin-bottom: 20px;
}

.password-box input {
    width: 100%;
    padding: 16px;
    font-size: 1.2rem;
    border: 2px solid #4361ee;
    border-radius: 8px;
    background: #0f0f23;
    color: #ffffff;
    margin-bottom: 15px;
    text-align: center;
}

.password-box input:focus {
    outline: none;
    border-color: #4cc9f0;
}

.password-box button {
    width: 100%;
    padding: 16px;
    font-size: 1.2rem;
    font-weight: 600;
    background: linear-gradient(135deg, #4361ee, #3a0ca3);
    border: none;
    border-radius: 8px;
    color: #ffffff;
    cursor: pointer;
}

.password-box button:active {
    transform: scale(0.98);
}

.password-error {
    color: #f72585;
    margin-top: 15px;
    font-size: 0.9rem;
}