/* ==========================================
   LAO KEYBOARD ONLINE - Stylesheet
   ========================================== */

:root {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-card: #1e293b;
    --bg-key: #334155;
    --bg-key-hover: #475569;
    --bg-key-active: #6366f1;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-shift: #818cf8;
    --accent: #6366f1;
    --accent-hover: #818cf8;
    --border-color: #334155;
    --success: #22c55e;
    --shadow: 0 4px 6px -1px rgba(0,0,0,0.3);
    --radius: 10px;
    --font-lao: 'Noto Sans Lao', 'Phetsarath OT', sans-serif;
    --font-ui: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

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

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

body {
    font-family: var(--font-ui);
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
header {
    background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
    border-bottom: 1px solid var(--border-color);
    padding: 1.2rem 2rem;
    text-align: center;
}

.header-content h1 {
    font-family: var(--font-lao);
    font-size: 1.8rem;
    font-weight: 700;
    background: linear-gradient(135deg, #818cf8, #c084fc);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: 0.3rem;
}

/* Main */
main {
    max-width: 1100px;
    width: 100%;
    margin: 0 auto;
    padding: 1.5rem 1rem;
    flex: 1;
}

/* Text Section */
.text-section {
    margin-bottom: 1.5rem;
}

.toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-bottom: none;
    border-radius: var(--radius) var(--radius) 0 0;
    padding: 0.6rem 1rem;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.toolbar-left {
    display: flex;
    gap: 0.4rem;
    flex-wrap: wrap;
}

.toolbar button {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.45rem 0.85rem;
    background: var(--bg-key);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.8rem;
    font-family: var(--font-ui);
    transition: all 0.15s ease;
    white-space: nowrap;
}

.toolbar button:hover {
    background: var(--bg-key-hover);
    border-color: var(--accent);
}

.toolbar button:active {
    background: var(--accent);
    transform: scale(0.97);
}

.font-size-control {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    color: var(--text-secondary);
    font-size: 0.8rem;
}

.font-size-control button {
    padding: 0.3rem 0.6rem;
    min-width: 32px;
}

#font-size-display {
    min-width: 35px;
    text-align: center;
    font-weight: 600;
    color: var(--accent);
}

#text-output {
    width: 100%;
    min-height: 160px;
    padding: 1rem 1.2rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 0 0 var(--radius) var(--radius);
    color: var(--text-primary);
    font-family: var(--font-lao);
    font-size: 20px;
    line-height: 1.8;
    resize: vertical;
    outline: none;
    transition: border-color 0.2s;
}

#text-output:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

#text-output::placeholder {
    color: var(--text-secondary);
    opacity: 0.6;
}

.text-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.4rem 0.2rem;
    font-size: 0.78rem;
    color: var(--text-secondary);
}

.copy-feedback {
    color: var(--success);
    font-weight: 600;
    opacity: 0;
    transition: opacity 0.3s;
}

.copy-feedback.show {
    opacity: 1;
}

/* Keyboard Section */
.keyboard-section {
    margin-bottom: 1.5rem;
}

.keyboard-controls {
    display: flex;
    justify-content: center;
    margin-bottom: 0.8rem;
}

/* Toggle Switch */
.toggle-switch {
    display: flex;
    align-items: center;
    gap: 0.7rem;
    cursor: pointer;
    user-select: none;
}

.toggle-switch input {
    display: none;
}

.slider {
    position: relative;
    width: 44px;
    height: 24px;
    background: var(--bg-key);
    border-radius: 12px;
    transition: background 0.3s;
}

.slider::after {
    content: '';
    position: absolute;
    top: 3px;
    left: 3px;
    width: 18px;
    height: 18px;
    background: var(--text-secondary);
    border-radius: 50%;
    transition: all 0.3s;
}

.toggle-switch input:checked + .slider {
    background: var(--accent);
}

.toggle-switch input:checked + .slider::after {
    left: 23px;
    background: white;
}

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

/* Keyboard */
.keyboard {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 0.8rem;
    box-shadow: var(--shadow);
    user-select: none;
}

.keyboard-row {
    display: flex;
    justify-content: center;
    gap: 4px;
    margin-bottom: 4px;
}

.keyboard-row:last-child {
    margin-bottom: 0;
}

/* Keys */
.key {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-width: 58px;
    height: 52px;
    padding: 4px 6px;
    background: var(--bg-key);
    border: 1px solid rgba(255,255,255,0.06);
    border-radius: 7px;
    color: var(--text-primary);
    font-family: var(--font-lao);
    font-size: 1.1rem;
    cursor: pointer;
    transition: all 0.1s ease;
    box-shadow: 0 2px 0 rgba(0,0,0,0.3);
    flex: 1;
    max-width: 72px;
}

.key:hover {
    background: var(--bg-key-hover);
    transform: translateY(-1px);
    box-shadow: 0 3px 0 rgba(0,0,0,0.3);
}

.key:active, .key.active {
    background: var(--bg-key-active);
    transform: translateY(1px);
    box-shadow: 0 0 0 rgba(0,0,0,0.3);
}

.key.pressed {
    background: var(--accent);
    transform: translateY(1px);
    box-shadow: 0 0 0 rgba(0,0,0,0.3);
}

.lao-char {
    font-size: 1.15rem;
    line-height: 1.2;
    font-weight: 600;
    white-space: nowrap;
}

.shift-char {
    font-size: 0.65rem;
    color: var(--text-shift);
    line-height: 1;
    position: absolute;
    top: 3px;
    right: 5px;
    white-space: nowrap;
}

/* Shift active: swap display */
.keyboard.shift-active .lao-char {
    font-size: 0.65rem;
    color: var(--text-shift);
    position: absolute;
    top: auto;
    bottom: 3px;
    right: 5px;
    font-weight: 400;
}

.keyboard.shift-active .shift-char {
    font-size: 1.15rem;
    color: var(--text-primary);
    font-weight: 600;
    position: static;
    line-height: 1.2;
}

/* Special keys */
.key-backspace {
    min-width: 90px;
    max-width: 120px;
    font-family: var(--font-ui);
    font-size: 0.75rem;
}

.key-tab {
    min-width: 70px;
    max-width: 90px;
    font-family: var(--font-ui);
    font-size: 0.75rem;
}

.key-caps {
    min-width: 85px;
    max-width: 105px;
    font-family: var(--font-ui);
    font-size: 0.75rem;
}

.key-caps.caps-on {
    background: var(--accent);
    color: white;
}

.key-enter {
    min-width: 100px;
    max-width: 130px;
    font-family: var(--font-ui);
    font-size: 0.75rem;
}

.key-shift-left, .key-shift-right {
    min-width: 110px;
    max-width: 140px;
    font-family: var(--font-ui);
    font-size: 0.8rem;
}

.key-shift-left.active, .key-shift-right.active {
    background: var(--accent) !important;
    color: white;
}

.key-space {
    flex: 5;
    max-width: none;
    font-family: var(--font-ui);
    font-size: 0.8rem;
}

.key-ctrl, .key-alt, .key-fn {
    flex: 1;
    max-width: 72px;
    font-family: var(--font-ui);
    font-size: 0.75rem;
    opacity: 0.5;
    cursor: default;
}

.key-backslash {
    min-width: 58px;
    max-width: 80px;
}

/* Info Section */
.info-section {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.info-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 1.2rem 1.4rem;
}

.info-card h3 {
    font-size: 1rem;
    font-family: var(--font-lao);
    margin-bottom: 0.8rem;
    color: var(--accent-hover);
}

.info-card ul {
    list-style: none;
    font-size: 0.85rem;
    line-height: 1.8;
    color: var(--text-secondary);
}

.info-card ul li::before {
    content: '▸ ';
    color: var(--accent);
}

.info-card p {
    font-size: 0.85rem;
    line-height: 1.7;
    color: var(--text-secondary);
    font-family: var(--font-lao);
}

kbd {
    display: inline-block;
    padding: 0.15rem 0.45rem;
    background: var(--bg-key);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 0.78rem;
    font-family: var(--font-ui);
    color: var(--text-primary);
}

/* Footer */
footer {
    text-align: center;
    padding: 1.2rem;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.8rem;
}

/* ==========================================
   TRANSLATION SECTION
   ========================================== */

.translate-section {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 1.2rem;
    margin-bottom: 1.5rem;
}

.translate-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 0.8rem;
    margin-bottom: 1rem;
}

.translate-header h2 {
    font-size: 1.15rem;
    font-family: var(--font-lao);
    background: linear-gradient(135deg, #818cf8, #34d399);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.api-config-area {
    flex: 1;
    min-width: 280px;
    max-width: 600px;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

/* Mode Toggle Buttons */
.mode-toggle {
    display: flex;
    gap: 4px;
    background: var(--bg-primary);
    border-radius: 8px;
    padding: 3px;
    border: 1px solid var(--border-color);
}

.mode-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.35rem;
    padding: 0.4rem 0.7rem;
    background: transparent;
    border: 1px solid transparent;
    border-radius: 6px;
    color: var(--text-secondary);
    font-family: var(--font-ui);
    font-size: 0.78rem;
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
}

.mode-btn:hover {
    color: var(--text-primary);
    background: rgba(99, 102, 241, 0.1);
}

.mode-btn.active {
    background: var(--accent);
    color: white;
    border-color: var(--accent);
    font-weight: 600;
    box-shadow: 0 2px 6px rgba(99, 102, 241, 0.3);
}

/* Config Panel */
.config-panel {
    animation: fadeIn 0.2s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-4px); }
    to { opacity: 1; transform: translateY(0); }
}

.config-row {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
}

.config-row label {
    font-size: 0.78rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.config-field {
    display: flex;
    gap: 4px;
    align-items: center;
}

.config-field input {
    flex: 1;
    padding: 0.45rem 0.7rem;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    font-family: monospace;
    font-size: 0.82rem;
    outline: none;
    transition: border-color 0.2s;
}

.config-field input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.1);
}

.config-field input::placeholder {
    color: var(--text-secondary);
    opacity: 0.5;
}

.config-hint {
    font-size: 0.7rem;
    line-height: 1.4;
    padding: 0.2rem 0;
}

#config-proxy .config-hint {
    color: var(--success);
}

#config-direct .config-hint {
    color: #f59e0b;
}

/* Service Badge */
.service-badge {
    display: inline-block;
    padding: 0.35rem 0.8rem;
    background: rgba(34, 197, 94, 0.12);
    border: 1px solid rgba(34, 197, 94, 0.3);
    border-radius: 20px;
    color: var(--success);
    font-size: 0.8rem;
    font-weight: 500;
    font-family: var(--font-ui);
}

/* Developer Settings */
.dev-settings {
    margin-top: 0.5rem;
}

.dev-settings summary {
    cursor: pointer;
    color: var(--text-secondary);
    font-size: 0.72rem;
    font-family: var(--font-ui);
    opacity: 0.6;
    transition: opacity 0.2s;
    user-select: none;
    list-style: none;
}

.dev-settings summary::-webkit-details-marker {
    display: none;
}

.dev-settings summary:hover {
    opacity: 1;
}

.dev-settings[open] summary {
    opacity: 1;
    margin-bottom: 0.5rem;
}

.dev-settings-content {
    padding: 0.5rem;
    background: rgba(0,0,0,0.15);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.btn-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    background: var(--bg-key);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.15s;
}

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

.key-status {
    font-size: 0.72rem;
    min-height: 1rem;
    transition: opacity 0.3s;
}

.key-status.saved {
    color: var(--success);
}

.key-status.error {
    color: #ef4444;
}

/* Translate Body - 3 columns */
.translate-body {
    display: flex;
    gap: 0.6rem;
    align-items: stretch;
    margin-bottom: 0.8rem;
}

.translate-panel {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.panel-header {
    margin-bottom: 0.4rem;
}

.panel-header select {
    width: 100%;
    padding: 0.45rem 0.6rem;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    font-family: var(--font-ui);
    font-size: 0.82rem;
    outline: none;
    cursor: pointer;
    transition: border-color 0.2s;
}

.panel-header select:focus {
    border-color: var(--accent);
}

.translate-panel textarea {
    flex: 1;
    min-height: 120px;
    padding: 0.8rem;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-family: var(--font-lao);
    font-size: 0.95rem;
    line-height: 1.7;
    resize: vertical;
    outline: none;
    transition: border-color 0.2s;
}

.translate-panel textarea:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.1);
}

.translate-panel textarea::placeholder {
    color: var(--text-secondary);
    opacity: 0.5;
}

.translate-panel textarea[readonly] {
    background: rgba(15, 23, 42, 0.6);
}

/* Middle controls */
.translate-controls {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.6rem;
    padding: 0 0.3rem;
    min-width: 50px;
}

.btn-swap {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--bg-key);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
}

.btn-swap:hover {
    background: var(--bg-key-hover);
    color: var(--accent);
    transform: rotate(180deg);
    border-color: var(--accent);
}

.btn-translate {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.6rem 1.2rem;
    background: linear-gradient(135deg, #6366f1, #8b5cf6);
    color: white;
    border: none;
    border-radius: 8px;
    font-family: var(--font-lao);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.3);
    white-space: nowrap;
}

.btn-translate:hover {
    background: linear-gradient(135deg, #818cf8, #a78bfa);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
}

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

.btn-translate:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.btn-translate.loading {
    position: relative;
    pointer-events: none;
}

.btn-translate.loading span {
    visibility: hidden;
}

.btn-translate.loading svg {
    visibility: hidden;
}

.btn-translate.loading::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255,255,255,0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Footer area */
.translate-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.translate-actions {
    display: flex;
    gap: 0.4rem;
}

.btn-small {
    display: flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.35rem 0.7rem;
    background: var(--bg-key);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-secondary);
    font-family: var(--font-ui);
    font-size: 0.75rem;
    cursor: pointer;
    transition: all 0.15s;
    white-space: nowrap;
}

.btn-small:hover {
    background: var(--bg-key-hover);
    color: var(--text-primary);
    border-color: var(--accent);
}

.translate-status {
    font-size: 0.75rem;
    color: var(--text-secondary);
    min-height: 1rem;
}

.translate-status.error {
    color: #ef4444;
}

.translate-status.success {
    color: var(--success);
}

.model-select-wrap {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.78rem;
    color: var(--text-secondary);
}

.model-select-wrap select {
    padding: 0.3rem 0.5rem;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 5px;
    color: var(--text-primary);
    font-family: var(--font-ui);
    font-size: 0.75rem;
    outline: none;
    cursor: pointer;
}

.model-select-wrap select:focus {
    border-color: var(--accent);
}

/* Responsive for translate */
@media (max-width: 768px) {
    .translate-body {
        flex-direction: column;
    }
    .translate-controls {
        flex-direction: row;
        min-width: auto;
        padding: 0.3rem 0;
    }
    .btn-swap {
        transform: rotate(90deg);
    }
    .btn-swap:hover {
        transform: rotate(270deg);
    }
    .translate-header {
        flex-direction: column;
    }
    .api-config-area {
        max-width: 100%;
        width: 100%;
    }
    .translate-footer {
        flex-direction: column;
        align-items: flex-start;
    }
}

/* Responsive */
@media (max-width: 900px) {
    .key {
        min-width: 42px;
        height: 46px;
        font-size: 0.95rem;
    }
    .lao-char { font-size: 1rem; }
    .shift-char { font-size: 0.55rem; }
    .keyboard.shift-active .lao-char { font-size: 0.55rem; }
    .keyboard.shift-active .shift-char { font-size: 1rem; }
    .key-backspace { min-width: 65px; }
    .key-tab { min-width: 55px; }
    .key-caps { min-width: 65px; }
    .key-enter { min-width: 75px; }
    .key-shift-left, .key-shift-right { min-width: 80px; }
    .info-section { grid-template-columns: 1fr; }
}

@media (max-width: 680px) {
    header { padding: 1rem; }
    .header-content h1 { font-size: 1.4rem; }
    main { padding: 1rem 0.5rem; }

    .keyboard { padding: 0.4rem; }
    .keyboard-row { gap: 2px; margin-bottom: 2px; }

    .key {
        min-width: 28px;
        height: 40px;
        padding: 2px 3px;
        font-size: 0.8rem;
        border-radius: 5px;
    }

    .lao-char { font-size: 0.85rem; }
    .shift-char { font-size: 0.5rem; top: 1px; right: 2px; }
    .keyboard.shift-active .lao-char { font-size: 0.5rem; bottom: 1px; right: 2px; }
    .keyboard.shift-active .shift-char { font-size: 0.85rem; }

    .key-backspace { min-width: 45px; font-size: 0.65rem; }
    .key-tab { min-width: 38px; font-size: 0.65rem; }
    .key-caps { min-width: 48px; font-size: 0.6rem; }
    .key-enter { min-width: 55px; font-size: 0.65rem; }
    .key-shift-left, .key-shift-right { min-width: 55px; font-size: 0.65rem; }

    .toolbar { padding: 0.4rem 0.6rem; }
    .toolbar button { padding: 0.35rem 0.55rem; font-size: 0.7rem; }
    .toolbar button span { display: none; }
    .toolbar button svg { width: 14px; height: 14px; }

    #text-output { min-height: 120px; font-size: 18px; padding: 0.8rem; }
}

@media (max-width: 400px) {
    .key {
        min-width: 22px;
        height: 36px;
    }
    .key-backspace { min-width: 36px; }
    .key-tab { min-width: 30px; }
    .key-caps { min-width: 38px; }
    .key-enter { min-width: 42px; }
    .key-shift-left, .key-shift-right { min-width: 42px; }
}