/* Prevent transitions on page load */
body.no-transition .tts-app,
body.no-transition .tts-app * {
    transition: none !important;
}

.tts-app,
.tts-app .tts-header,
.tts-app .tts-status-bar,
.tts-app .text-input,
.tts-app .control-select-minimal,
.tts-app .desktop-dropdown-button,
.tts-app .desktop-modal .modal-content,
.tts-app .settings-button,
.tts-app .play-button-primary,
.tts-app .notification,
.tts-app .status-right kbd {
    transition: background-color 0.3s ease,
                color 0.3s ease,
                border-color 0.3s ease;
}

.tts-app h1 {
    font-size: 2.25rem;
    font-weight: 700;
    line-height: 1.2;
    color: var(--gray-800);
}

.tts-app h2 {
    font-size: 1.5rem;
    font-weight: 600;
    line-height: 1.3;
    color: var(--gray-800);
}

.tts-app h3 {
    font-size: 1.125rem;
    font-weight: 600;
    line-height: 1.4;
    color: var(--gray-700);
}

.tts-app p {
    color: var(--gray-600);
}

.tts-app {
    flex: 1;
    display: flex;
    flex-direction: column;
    margin: 0 auto;
    width: 100%;
    background: var(--white);
}

.tts-app .tts-header {
    background: var(--white);
}

.tts-app .header-controls {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-md) var(--space-xl);
    height: 72px;
    position: relative;
}

.tts-app .control-zone-left {
    position: absolute;
    left: var(--space-xl);
    display: flex;
    align-items: center;
    justify-content: flex-start;
}

.tts-app .app-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    color: var(--gray-700);
    font-size: 24px;
}

.tts-app .control-zone-center {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-lg);
}

.tts-app .control-zone-right {
    position: absolute;
    right: var(--space-xl);
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: var(--space-sm);
}

.tts-app .control-select-minimal {
    padding: 8px 12px;
    background: transparent;
    border: none;
    border-radius: 6px;
    font-family: var(--font-main);
    font-size: 0.9375rem;
    font-weight: 400;
    color: var(--gray-700);
    cursor: pointer;
    transition: var(--transition);
    min-width: 100px;
    height: 40px;
}

.tts-app .control-select-minimal:hover {
    background: var(--gray-50);
}

.tts-app .control-select-minimal:focus {
    outline: none;
    background: var(--gray-100);
}

.tts-app .control-select-minimal:focus-visible {
    outline: 1px solid var(--gray-300);
    outline-offset: 2px;
}

.tts-app .play-button-primary {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--accent-blue);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    transition: background-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
    font-size: 16px;
    position: relative;
}

.tts-app .play-button-primary:hover {
    background: var(--accent-blue-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(212, 130, 15, 0.2);
}

.tts-app .play-button-primary:active {
    transform: scale(0.95);
}

.tts-app .play-button-primary:focus-visible {
    outline: 2px solid var(--accent-blue);
    outline-offset: 2px;
}

.tts-app .settings-button,
.tts-app .theme-toggle-button {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: transparent;
    color: var(--gray-500);
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: background-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
    font-size: 20px;
}

.tts-app .settings-button:hover,
.tts-app .theme-toggle-button:hover {
    background: var(--gray-100);
    color: var(--gray-700);
}

.tts-app .settings-button:active,
.tts-app .theme-toggle-button:active {
    background: var(--gray-200);
    transform: scale(0.95);
}

.tts-app .settings-button:focus-visible,
.tts-app .theme-toggle-button:focus-visible {
    outline: 2px solid var(--accent-blue);
    outline-offset: 2px;
}

.tts-app .header-controls .control-warning {
    position: absolute;
    bottom: -24px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.75rem;
    color: var(--accent-orange);
    white-space: nowrap;
}

@media (max-width: 768px) {
    .tts-app .header-controls {
        padding: var(--space-md) var(--space-lg);
        gap: var(--space-md);
        height: 64px;
    }

    .tts-app .control-select-minimal {
        min-width: 90px;
        font-size: 0.875rem;
    }

    .tts-app .play-button-primary {
        width: 40px;
        height: 40px;
        font-size: 16px;
    }

    .tts-app .settings-button {
        width: 36px;
        height: 36px;
        font-size: 18px;
    }
}

.tts-app .tts-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: var(--space-xl);
    min-height: 0;
}

.tts-app .tts-status-bar {
    background: var(--white);
    padding: var(--space-md) var(--space-xl);
    flex-shrink: 0;
    position: relative;
    overflow: hidden;
    width: 100%;
    box-sizing: border-box;
}

.tts-app .status-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.875rem;
    color: var(--gray-500);
    overflow: hidden;
    width: 100%;
}

.tts-app .status-left {
    font-weight: 500;
    color: var(--gray-700);
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    min-width: 0;
}

.tts-app .status-center {
    font-family: var(--font-mono);
    color: var(--gray-600);
    flex: 0 0 auto;
    text-align: center;
    margin: 0 var(--space-md);
    white-space: nowrap;
}

.tts-app .status-right {
    font-size: 0.75rem;
    color: var(--gray-400);
    flex: 1;
    text-align: right;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    min-width: 0;
}

.tts-app .status-right kbd {
    padding: 2px 6px;
    background: var(--gray-100);
    border: 1px solid var(--gray-200);
    border-radius: 3px;
    font-family: var(--font-mono);
    font-size: 0.6875rem;
    margin: 0 1px;
}

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

.tts-app .fade-in {
    animation: fadeIn 0.3s ease;
}

.tts-app .control-group {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 6px;
    justify-content: center;
    min-height: 46px;
    max-height: 46px;
}

.tts-app .control-group:first-child {
    align-items: flex-start;
    text-align: left;
}

.tts-app .control-group:last-child {
    align-items: flex-end;
    text-align: right;
}

.tts-app .control-label {
    font-size: 0.75rem;
    font-weight: 400;
    color: var(--gray-500);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 0;
}

.tts-app .control-select {
    padding: 10px var(--space-md);
    background: transparent;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 600;
    font-family: var(--font-main);
    color: var(--gray-800);
    transition: var(--transition);
    outline: none;
    cursor: pointer;
    min-width: 100px;
    height: 40px;
    box-sizing: border-box;
}

.tts-app .control-select:hover {
    background: var(--gray-50);
    color: var(--gray-900);
}

.tts-app .control-select:focus {
    background: var(--gray-50);
    color: var(--gray-900);
    box-shadow: 0 0 0 2px rgba(0, 0, 0, 0.04);
}

.tts-app .control-warning {
    font-size: 0.75rem;
    color: var(--accent-orange);
    font-weight: 400;
    text-align: center;
    margin-top: var(--space-xs);
    grid-column: 1 / -1;
}

.tts-app .play-button {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background: var(--accent-blue);
    color: var(--gray-900);
    border: none;
    border-radius: 50%;
    font-size: 1.125rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-smooth);
    box-shadow: 0 2px 6px rgba(212, 130, 15, 0.12);
    position: relative;
    outline: none;
    justify-self: center;
    align-self: end;
    margin-bottom: 4px;
}

.tts-app .play-button:hover {
    background: var(--accent-blue-hover);
    transform: translateY(-1px);
    box-shadow: 0 3px 12px rgba(212, 130, 15, 0.18);
}

.tts-app .play-button:active {
    transform: translateY(0);
    transition: none;
}

.tts-app .play-button:focus {
    box-shadow: 0 2px 6px rgba(212, 130, 15, 0.12),
                0 0 0 3px rgba(212, 130, 15, 0.1);
}

.tts-app .play-button.playing span {
    font-size: 1rem;
}

.tts-app .speed-indicator {
    position: absolute;
    top: -6px;
    right: -6px;
    background: var(--accent-orange);
    color: var(--gray-900);
    font-size: 0.75rem;
    font-weight: 500;
    padding: 2px 6px;
    border-radius: 10px;
    font-family: var(--font-mono);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.tts-app .text-input {
    width: 100%;
    flex: 1;
    min-height: 0;
    padding: var(--space-lg);
    background: var(--gray-50);
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-family: var(--font-main);
    line-height: 1.6;
    color: var(--gray-800);
    resize: none;
    transition: var(--transition);
    outline: none;
}

.tts-app .text-input:hover {
    background: var(--gray-50);
}

.tts-app .text-input:focus {
    background: var(--gray-100);
}

.tts-app .text-input:focus-visible {
    outline: 1px solid var(--gray-300);
    outline-offset: 2px;
}

.tts-app .text-input::placeholder {
    color: var(--gray-400);
    font-style: normal;
}

.tts-app .text-input:focus::placeholder {
    color: var(--gray-300);
    transition: color 0.2s ease;
}

.tts-app .text-input::selection {
    background: rgba(212, 130, 15, 0.2);
    color: var(--gray-900);
}

.tts-app .progress-container {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gray-200);
    overflow: hidden;
}

.tts-app .progress-bar {
    height: 100%;
    background: linear-gradient(90deg,
        var(--accent-blue) 0%,
        var(--accent-blue-hover) 100%);
    transition: width 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    transform-origin: left;
    position: relative;
}

.tts-app .progress-bar::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 20px;
    height: 100%;
    background: linear-gradient(90deg,
        transparent 0%,
        rgba(212, 130, 15, 0.4) 100%);
    opacity: 0;
    transition: opacity 0.2s ease;
}

.tts-app .progress-bar.animating::after {
    opacity: 1;
}

.tts-app .status-content {
    padding-top: var(--space-xs);
}

.tts-app .status-right kbd {
    display: inline-block;
    padding: 2px 5px;
    background: var(--gray-100);
    border: 1px solid var(--gray-300);
    border-bottom: 2px solid var(--gray-300);
    border-radius: 3px;
    font-family: var(--font-mono);
    font-size: 0.6875rem;
    font-weight: 500;
    color: var(--gray-600);
    line-height: 1;
    box-shadow: 0 1px 0 var(--gray-200);
}

.tts-app .progress-bar.playing {
    background: linear-gradient(90deg,
        var(--accent-green) 0%,
        var(--accent-green-dark) 100%);
}

.tts-app .progress-bar.paused {
    background: linear-gradient(90deg,
        var(--accent-orange) 0%,
        var(--accent-orange-dark) 100%);
}

.tts-app .progress-bar.loading {
    background: linear-gradient(90deg,
        var(--gray-400) 0%,
        var(--gray-500) 100%);
    animation: loading-pulse 1.5s ease-in-out infinite;
}

@keyframes loading-pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

.tts-app .notification-container {
    position: fixed;
    top: var(--space-lg);
    right: var(--space-lg);
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    pointer-events: none;
    max-width: 400px;
}

.tts-app .notification {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-lg);
    background: var(--white);
    border: 1px solid var(--gray-100);
    border-radius: 8px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
    font-size: 0.875rem;
    font-weight: 500;
    line-height: 1.4;
    max-width: 400px;
    min-width: 300px;
    pointer-events: auto;
    opacity: 1;
    transform: translateY(0);
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.tts-app .notification .notification-icon {
    font-size: 1rem;
    font-weight: 600;
    flex-shrink: 0;
    width: 16px;
    height: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.tts-app .notification-success {
    border-left: 4px solid var(--accent-green);
    color: var(--gray-800);
}

.tts-app .notification-success .notification-icon {
    color: var(--accent-green);
}

.tts-app .notification-error {
    border-left: 4px solid var(--accent-red);
    color: var(--gray-800);
}

.tts-app .notification-error .notification-icon {
    color: var(--accent-red);
}

.tts-app .notification-info {
    border-left: 4px solid var(--accent-blue);
    color: var(--gray-800);
}

.tts-app .notification-info .notification-icon {
    color: var(--accent-blue);
}

.tts-app .notification-warning {
    border-left: 4px solid var(--accent-orange);
    color: var(--gray-800);
}

.tts-app .notification-warning .notification-icon {
    color: var(--accent-orange);
}

.tts-app .notification.hidden {
    opacity: 0;
    transform: translateX(100%);
    pointer-events: none;
}

.tts-app .notification.show {
    opacity: 1;
    transform: translateX(0);
}

.tts-app .notification.fade-out {
    opacity: 0;
    transform: translateX(50px);
    pointer-events: none;
}

.tts-app .notification.show:hover {
    transform: translateX(-4px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
}

.tts-app .notification::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    height: 2px;
    background: currentColor;
    opacity: 0.2;
    transform-origin: left;
    transition: width 3s linear;
}

.tts-app .notification.auto-dismiss::after {
    width: 100%;
}

.tts-app .notification + .notification {
    margin-top: var(--space-xs);
}

@media (max-width: 768px) {
    .tts-app .notification-container {
        top: var(--space-md);
        right: var(--space-md);
        left: var(--space-md);
        max-width: none;
    }

    .tts-app .notification {
        min-width: auto;
        max-width: none;
    }
}

@media (max-width: 768px) {
    .tts-app {
        box-shadow: none;
    }

    .tts-app .tts-header {
        padding: var(--space-md) var(--space-lg);
    }

    .tts-app .header-title {
        margin-bottom: var(--space-md);
    }

    .tts-app .main-title {
        font-size: 1.75rem;
    }

    .tts-app .control-panel {
        gap: var(--space-xl);
        padding: 0 var(--space-sm);
        min-height: 56px;
    }

    .tts-app .control-group {
        min-width: auto;
    }

    .tts-app .control-select {
        font-size: 0.9375rem;
        min-width: 80px;
        height: 36px;
        padding: 8px var(--space-sm);
    }

    .tts-app .play-button {
        width: 44px;
        height: 44px;
        font-size: 1rem;
    }

    .tts-app .tts-content {
        padding: var(--space-lg);
    }

    .tts-app .text-input {
        padding: var(--space-md);
    }

    .tts-app .tts-status-bar {
        padding: var(--space-sm) var(--space-lg);
    }

    .tts-app .status-content {
        font-size: 0.8125rem;
    }

    .tts-app .status-right {
        font-size: 0.6875rem;
    }
}

.tts-app .tts-status-bar.loading {
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--gray-100) 100%);
    border-top: 1px solid rgba(212, 130, 15, 0.2);
    transition: background 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
    box-shadow: inset 0 1px 0 rgba(212, 130, 15, 0.1);
}

/* DO NOT change layout */

.tts-app .tts-status-bar.loading::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg,
        transparent 0%,
        rgba(212, 130, 15, 0.4) 20%,
        rgba(212, 130, 15, 0.6) 50%,
        rgba(212, 130, 15, 0.4) 80%,
        transparent 100%);
    animation: loading-sweep 3s ease-in-out infinite;
}

@keyframes loading-sweep {
    0%, 100% { transform: translateX(-100%); }
    50% { transform: translateX(100%); }
}

.tts-app .tts-status-bar.loading .status-left {
    color: var(--gray-800);
    /* same font-weight (avoid layout shift) */
}

.tts-app .tts-status-bar.loading .status-center {
    color: var(--accent-blue);
}

.tts-app .tts-status-bar.loading .status-right {
    color: var(--gray-600);
    /* same font-weight (avoid layout shift) */
}

.tts-app .loading-spinner {
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top: 2px solid #ffffff;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

.tts-app .play-button.loading {
    cursor: not-allowed;
    transform: none !important;
}

.tts-app .play-button.loading:hover {
    transform: none !important;
    box-shadow: 0 4px 12px rgba(212, 130, 15, 0.15);
}

.tts-app .control-warning.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    transition: all 0.3s ease;
}

.tts-app .control-warning {
    opacity: 0;
    visibility: hidden;
    transform: translateY(-5px);
    transition: all 0.3s ease;
}

.tts-app .play-button,
.tts-app .control-select {
    transform: translate3d(0, 0, 0);
    backface-visibility: hidden;
    perspective: 1000px;
}

@media (prefers-reduced-motion: reduce) {
    .tts-app *,
.tts-app *::before,
.tts-app *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }

    .tts-app .play-button:hover {
        transform: none;
    }

    .tts-app .notification {
        transform: none;
        opacity: 1;
    }

    .tts-app .notification.hidden {
        display: none;
    }
}

.tts-app .control-select:focus-visible {
    outline: 2px solid var(--accent-blue);
    outline-offset: 2px;
}

.tts-app .play-button:focus-visible {
    outline: 3px solid var(--accent-blue);
    outline-offset: 3px;
}

.tts-app .play-button,
.tts-app .control-select,
.tts-app .text-input {
    transition: all 0.2s ease,
                transform 0.3s cubic-bezier(0.25, 0.8, 0.25, 1),
                box-shadow 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.tts-app .progress-bar,
.tts-app .notification {
    will-change: transform, opacity;
}

.tts-app .progress-bar.animating,
.tts-app .notification.show,
.tts-app .notification.fade-out {
    will-change: auto;
}

.tts-app ::selection {
    background: rgba(212, 130, 15, 0.2);
    color: var(--gray-900);
}

.tts-app ::-moz-selection {
    background: rgba(212, 130, 15, 0.2);
    color: var(--gray-900);
}

.tts-app ::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

.tts-app ::-webkit-scrollbar-track {
    background: var(--gray-100);
    border-radius: 4px;
}

.tts-app ::-webkit-scrollbar-thumb {
    background: var(--gray-300);
    border-radius: 4px;
    transition: background 0.2s ease;
}

.tts-app ::-webkit-scrollbar-thumb:hover {
    background: var(--gray-400);
}

.tts-app .text-input::-webkit-scrollbar {
    width: 6px;
}

.tts-app .text-input::-webkit-scrollbar-track {
    background: var(--gray-50);
}

.tts-app .text-input::-webkit-scrollbar-thumb {
    background: var(--gray-200);
}

.tts-app .text-input::-webkit-scrollbar-thumb:hover {
    background: var(--gray-300);
}

/* hide native selects on desktop (custom buttons replace them) */
@media (min-width: 769px) {
    .tts-app .control-select-minimal {
        display: none !important;
    }

    .tts-app .desktop-dropdown-button {
        display: flex !important;
        align-items: center;
        gap: var(--space-sm);
        padding: var(--space-sm) var(--space-md);
        background: transparent;
        border: none;
        border-radius: 6px;
        font-size: 0.9375rem;
        color: var(--gray-700);
        cursor: pointer;
        transition: background-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
        min-height: 40px;
        font-family: var(--font-main);
        font-weight: 500;
        min-width: 100px;
        justify-content: space-between;
    }

    .tts-app .desktop-dropdown-button:hover {
        background: var(--gray-50);
        color: var(--gray-900);
    }

    .tts-app .desktop-dropdown-button:active {
        transform: scale(0.95);
    }

    .tts-app .desktop-dropdown-button:focus-visible {
        background: var(--gray-50);
        color: var(--gray-900);
        outline: 2px solid var(--accent-blue);
        outline-offset: 2px;
    }

    .tts-app .desktop-dropdown-button .button-content {
        display: flex;
        align-items: center;
        gap: var(--space-xs);
        flex: 1;
    }

    .tts-app .desktop-dropdown-button .button-flag {
        font-size: 1rem;
        flex-shrink: 0;
    }

    .tts-app .desktop-dropdown-button .button-text {
        font-weight: 600;
        flex: 1;
        text-align: left;
    }

    .tts-app .desktop-dropdown-button .button-chevron {
        font-size: 0.75rem;
        opacity: 0.6;
        flex-shrink: 0;
    }

    .tts-app .desktop-voice-button {
        min-width: 120px;
    }

    .tts-app .desktop-speed-button {
        min-width: 80px;
    }

    .tts-app .desktop-speed-button .button-text {
        text-align: center;
    }
}

@media (min-width: 769px) {

    .tts-app .desktop-modal {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        z-index: 1000;
        display: flex;
        align-items: center;
        justify-content: center;
        padding: var(--space-lg);
        opacity: 0;
        pointer-events: none;
        transition: opacity 0.2s ease;
    }

    .tts-app .desktop-modal:not(.hidden) {
        opacity: 1;
        pointer-events: auto;
    }

    .tts-app .desktop-modal .modal-overlay {
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, 0.5);
        backdrop-filter: blur(2px);
    }

    .tts-app .desktop-modal .modal-content {
        position: relative;
        background: var(--white);
        border-radius: 12px;
        width: 100%;
        max-width: 500px;
        max-height: 600px;
        box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
        display: flex;
        flex-direction: column;
        overflow: hidden;
        transform: scale(0.95) translateY(20px);
        transition: transform 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    }

    .tts-app .desktop-modal:not(.hidden) .modal-content {
        transform: scale(1) translateY(0);
    }

    .tts-app .desktop-modal .modal-header {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: var(--space-md);
        border-bottom: 1px solid var(--gray-200);
        flex-shrink: 0;
    }

    .tts-app .desktop-modal .modal-title {
        font-size: 1.125rem;
        font-weight: 600;
        color: var(--gray-800);
        margin: 0;
    }

    .tts-app .desktop-modal .modal-close {
        width: 32px;
        height: 32px;
        display: flex;
        align-items: center;
        justify-content: center;
        background: transparent;
        border: none;
        border-radius: 6px;
        color: var(--gray-500);
        cursor: pointer;
        transition: background-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
    }

    .tts-app .desktop-modal .modal-close:hover {
        background: var(--gray-100);
        color: var(--gray-800);
    }

    .tts-app .desktop-modal .modal-close:active {
        transform: scale(0.95);
    }

    .tts-app .desktop-modal .modal-close:focus-visible {
        outline: 2px solid var(--accent-blue);
        outline-offset: 2px;
    }

    .tts-app .desktop-modal .modal-search {
        position: relative;
        padding: var(--space-md);
        border-bottom: 1px solid var(--gray-200);
        flex-shrink: 0;
    }

    .tts-app .desktop-modal .modal-search .search-icon {
        position: absolute;
        left: calc(var(--space-md) + var(--space-sm));
        top: 50%;
        transform: translateY(-50%);
        width: 16px;
        height: 16px;
        color: var(--gray-400);
    }

    .tts-app .desktop-modal .modal-search .search-input {
        width: 100%;
        padding: var(--space-sm) var(--space-sm) var(--space-sm) calc(var(--space-xl) + 8px);
        border: 1px solid var(--gray-100);
        border-radius: 6px;
        background: var(--gray-50);
        font-size: 0.875rem;
        color: var(--gray-900);
        transition: var(--transition);
        font-family: var(--font-main);
    }

    .tts-app .desktop-modal .modal-search .search-input:focus {
        outline: none;
        border-color: var(--gray-400);
        background: var(--white);
    }

    .tts-app .desktop-modal .modal-search .search-input::placeholder {
        color: var(--gray-400);
    }

    .tts-app .desktop-modal .options-container {
        flex: 1;
        overflow-y: auto;
        padding: var(--space-sm);
    }

    .tts-app .desktop-modal .option-item {
        display: flex;
        align-items: center;
        gap: var(--space-sm);
        width: 100%;
        padding: var(--space-sm);
        background: transparent;
        border: none;
        border-radius: 6px;
        text-align: left;
        cursor: pointer;
        transition: background-color 0.2s ease, color 0.2s ease, transform 0.1s ease;
        margin: 2px 0;
        min-height: 44px;
        font-family: var(--font-main);
        color: var(--gray-700);
    }

    .tts-app .desktop-modal .option-item:hover {
        background: var(--gray-100);
        color: var(--gray-800);
    }

    .tts-app .desktop-modal .option-item:active {
        transform: scale(0.95);
    }

    .tts-app .desktop-modal .option-item.selected {
        background: var(--accent-blue);
        color: #ffffff;
    }

    .tts-app .desktop-modal .option-icon {
        font-size: 1.125rem;
        flex-shrink: 0;
        width: 24px;
        text-align: center;
        display: flex;
        align-items: center;
        justify-content: center;
        color: var(--gray-600);
    }

    .tts-app .desktop-speed-modal .option-icon {
        font-size: 1rem;
        color: inherit;
        opacity: 0.8;
    }

    .tts-app .desktop-modal .option-item:hover .option-icon {
        color: var(--gray-700);
    }

    .tts-app .desktop-modal .option-item.selected .option-icon {
        color: #ffffff;
    }

    .tts-app .desktop-modal .option-details {
        flex: 1;
        min-width: 0;
    }

    .tts-app .desktop-modal .option-name {
        font-size: 0.875rem;
        font-weight: 500;
        color: inherit;
        margin: 0;
        line-height: 1.3;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }

    .tts-app .desktop-modal .option-description {
        font-size: 0.75rem;
        color: inherit;
        opacity: 0.7;
        margin: 0;
        line-height: 1.2;
    }

    .tts-app .desktop-voice-modal .voice-categories {
        flex: 1;
        overflow-y: auto;
        padding: var(--space-sm);
    }

    .tts-app .desktop-voice-modal .voice-category {
        margin-bottom: var(--space-md);
    }

    .tts-app .desktop-voice-modal .voice-category:last-child {
        margin-bottom: 0;
    }

    .tts-app .desktop-voice-modal .category-header {
        font-size: 0.75rem;
        font-weight: 600;
        color: var(--gray-500);
        text-transform: uppercase;
        letter-spacing: 0.5px;
        margin-bottom: var(--space-xs);
        padding: 0 var(--space-sm);
    }

    .tts-app .desktop-speed-modal .speed-options-list {
        flex: 1;
        overflow-y: auto;
        padding: var(--space-sm);
    }

    .tts-app .desktop-modal .options-container::-webkit-scrollbar,
.tts-app .desktop-modal .voice-categories::-webkit-scrollbar,
.tts-app .desktop-modal .speed-options-list::-webkit-scrollbar {
        width: 6px;
    }

    .tts-app .desktop-modal .options-container::-webkit-scrollbar-track,
.tts-app .desktop-modal .voice-categories::-webkit-scrollbar-track,
.tts-app .desktop-modal .speed-options-list::-webkit-scrollbar-track {
        background: transparent;
    }

    .tts-app .desktop-modal .options-container::-webkit-scrollbar-thumb,
.tts-app .desktop-modal .voice-categories::-webkit-scrollbar-thumb,
.tts-app .desktop-modal .speed-options-list::-webkit-scrollbar-thumb {
        background: var(--gray-300);
        border-radius: 3px;
    }

    .tts-app .desktop-modal .options-container::-webkit-scrollbar-thumb:hover,
.tts-app .desktop-modal .voice-categories::-webkit-scrollbar-thumb:hover,
.tts-app .desktop-modal .speed-options-list::-webkit-scrollbar-thumb:hover {
        background: var(--gray-400);
    }
}

@media (max-width: 480px) {

    .tts-app {
        overflow-x: hidden;
        max-width: 100vw;
    }

    .tts-app {
        height: 100vh;
        display: flex;
        flex-direction: column;
        max-width: 100vw;
        overflow-x: hidden;
    }

    .tts-app .tts-header {
        order: 1;
        padding: var(--space-sm) var(--space-md);
        flex-shrink: 0;
    }

    .tts-app .tts-content {
        order: 2;
        flex: 1;
        padding: var(--space-md);
        display: flex;
        flex-direction: column;
        min-height: 0;
    }

    .tts-app .tts-status-bar {
        order: 3;
        flex-shrink: 0;
        background: var(--white);
        padding: 0;
        position: relative;
        display: flex;
        flex-direction: column;
    }

    .tts-app .tts-header {
        display: flex;
        flex-direction: column;
        gap: var(--space-sm);
    }

    .tts-app .header-controls {
        display: flex;
        justify-content: space-between;
        align-items: center;
        height: 40px;
        padding: 0;
        order: 1;
    }

    .tts-app .mobile-controls-row {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 16px;
        padding: var(--space-sm) 0;
        order: 2;
        max-width: 100%;
        box-sizing: border-box;
        overflow-x: hidden;
    }

    .tts-app .control-zone-left,
.tts-app .control-zone-right {
        position: static;
    }

    .tts-app .header-controls .control-zone-center {
        display: none !important;
    }

    .tts-app .header-controls .control-warning {
        display: none;
    }

    .tts-app .text-input {
        flex: 1;
        resize: none;
        margin-bottom: 0;
    }

    .tts-app .tts-status-bar {
        display: flex;
        flex-direction: column;
        padding: 0;
        min-height: auto;
    }

    .tts-app .status-content {
        padding: var(--space-sm) var(--space-md);
        font-size: 0.75rem;
        display: flex;
        justify-content: space-between;
        align-items: center;
        background: var(--gray-50);
        order: 1;
    }

    .tts-app .status-left {
        font-size: 0.75rem;
        color: var(--gray-600);
    }

    .tts-app .status-center {
        font-size: 0.75rem;
        color: var(--gray-700);
        font-family: var(--font-mono);
    }

    .tts-app .status-right {
        display: none; /* hide keyboard shortcuts on mobile */
    }

    .tts-app .tts-status-bar .control-zone-center {
        display: none !important;
    }

    .tts-app .control-select-minimal {
        display: none !important;
    }

    .tts-app .mobile-controls-row .control-button-dynamic {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: var(--space-xs);
        padding: var(--space-sm) var(--space-md);
        background: transparent;
        border: none;
        border-radius: 6px;
        font-size: 0.875rem;
        color: var(--gray-700);
        cursor: pointer;
        transition: var(--transition);
        min-height: 44px;
        overflow: hidden;
        font-family: var(--font-main);
        font-weight: 500;
        box-sizing: border-box;
        width: 100%;
    }

    .tts-app .mobile-controls-row .control-button-dynamic:hover,
.tts-app .mobile-controls-row .control-button-dynamic:focus {
        background: rgba(0, 0, 0, 0.05);
        outline: none;
    }

    .tts-app .mobile-controls-row .control-button-dynamic:active {
        background: rgba(0, 0, 0, 0.1);
        transform: scale(0.98);
    }

    .tts-app .mobile-controls-row .play-button-primary {
        width: 48px;
        height: 48px;
        font-size: 18px;
        flex-shrink: 0;
        order: 2; /* center via flex order */
        border-radius: 50%;
        background: var(--accent-blue);
        border: none;
        color: white;
        cursor: pointer;
        transition: var(--transition);
    }

    .tts-app .mobile-controls-row .play-button-primary:hover,
.tts-app .mobile-controls-row .play-button-primary:focus {
        background: var(--accent-blue-dark);
        outline: none;
    }

    .tts-app .mobile-controls-row .voice-button {
        order: 1;
        width: 120px;
        min-width: 120px;
        max-width: 120px;
        justify-content: center;
    }

    .tts-app .mobile-controls-row .speed-button {
        order: 3;
        width: 120px;
        min-width: 120px;
        max-width: 120px;
        justify-content: center;
        padding-left: var(--space-sm);
        padding-right: var(--space-sm);
    }

    .tts-app .progress-container {
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        height: 2px;
        z-index: 20;
    }

    .tts-app .speed-indicator {
        display: none !important;
    }

    .tts-app .notification-container {
        top: var(--space-sm);
        right: var(--space-sm);
        left: var(--space-sm);
        z-index: 1050; /* above modals */
    }

    .tts-app .notification {
        min-width: auto;
        max-width: none;
    }
}

@media (max-width: 480px) {

    .tts-app .control-button-dynamic {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: var(--space-xs);
        padding: var(--space-sm) var(--space-md);
        background: transparent;
        border: none;
        border-radius: 6px;
        font-size: 0.875rem;
        color: var(--gray-700);
        cursor: pointer;
        transition: var(--transition);
        min-height: 44px;
        overflow: hidden;
        font-family: var(--font-main);
        font-weight: 500;
        box-sizing: border-box;
        width: 100%;
    }

    .tts-app .control-button-dynamic:hover,
.tts-app .control-button-dynamic:focus {
        background: rgba(0, 0, 0, 0.05);
        outline: none;
    }

    .tts-app .control-button-dynamic:active {
        background: rgba(0, 0, 0, 0.1);
        transform: scale(0.98);
    }

    .tts-app .control-button-dynamic.touch-active {
        background: rgba(0, 0, 0, 0.1);
        transform: scale(0.98);
    }

    .tts-app .voice-button .button-icon {
        font-size: 0.875rem;
        flex-shrink: 0;
        margin-right: var(--space-xs);
    }

    .tts-app .voice-button .button-text {
        text-align: center;
        flex: 1;
        font-weight: 600;
        letter-spacing: 0.25px;
    }

    .tts-app .speed-button .button-icon {
        font-size: 1rem;
        flex-shrink: 0;
    }

    .tts-app .button-text {
        flex: 1;
        min-width: 0;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
        font-weight: 500;
        text-align: center;
        max-width: 100%;
    }

    .tts-app .speed-button .button-text {
        text-align: center;
        flex: 1;
    }

    .tts-app .button-chevron {
        flex-shrink: 0;
        font-size: 0.75rem;
        opacity: 0.6;
        margin-left: var(--space-xs);
    }

    .tts-app .speed-button .button-chevron {
        margin-left: var(--space-xs);
    }
}

.tts-app .mobile-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-md);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease;
}

.tts-app .mobile-modal:not(.hidden) {
    opacity: 1;
    pointer-events: auto;
}

.tts-app .modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(2px);
}

.tts-app .modal-content {
    position: relative;
    background: var(--white);
    border-radius: 12px;
    width: 100%;
    max-width: 400px;
    max-height: 70vh;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transform: scale(0.95) translateY(20px);
    transition: transform 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.tts-app .mobile-modal:not(.hidden) .modal-content {
    transform: scale(1) translateY(0);
}

.tts-app .modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md);
    border-bottom: 1px solid var(--gray-200);
    flex-shrink: 0;
}

.tts-app .modal-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--gray-800);
    margin: 0;
}

.tts-app .modal-close {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    border-radius: 6px;
    color: var(--gray-500);
    cursor: pointer;
    transition: var(--transition);
}

.tts-app .modal-close:hover {
    background: var(--gray-100);
    color: var(--gray-800);
}

.tts-app .modal-search {
    position: relative;
    padding: var(--space-md);
    border-bottom: 1px solid var(--gray-200);
    flex-shrink: 0;
}

.tts-app .modal-search .search-icon {
    position: absolute;
    left: calc(var(--space-md) + var(--space-sm));
    top: 50%;
    transform: translateY(-50%);
    width: 16px;
    height: 16px;
    color: var(--gray-400);
}

.tts-app .modal-search .search-input {
    width: 100%;
    padding: var(--space-sm) var(--space-sm) var(--space-sm) calc(var(--space-xl) + 8px);
    border: 1px solid var(--gray-100);
    border-radius: 6px;
    background: var(--gray-50);
    font-size: 0.875rem;
    color: var(--gray-900);
    transition: var(--transition);
    font-family: var(--font-main);
}

.tts-app .modal-search .search-input:focus {
    outline: none;
    border-color: var(--gray-400);
    background: var(--white);
}

.tts-app .modal-search .search-input::placeholder {
    color: var(--gray-400);
}

.tts-app .voice-categories {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-sm);
}

.tts-app .voice-category {
    margin-bottom: var(--space-md);
}

.tts-app .voice-category:last-child {
    margin-bottom: 0;
}

.tts-app .category-header {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--gray-500);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--space-xs);
    padding: 0 var(--space-sm);
}

.tts-app .voice-option {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    width: 100%;
    padding: var(--space-sm);
    background: transparent;
    border: none;
    border-radius: 6px;
    text-align: left;
    cursor: pointer;
    transition: var(--transition);
    margin: 2px 0;
    min-height: 44px;
    font-family: var(--font-main);
}

.tts-app .voice-option:hover {
    background: var(--gray-100);
}

.tts-app .voice-option.selected {
    background: var(--accent-blue);
    color: var(--gray-900);
}

.tts-app .voice-flag {
    font-size: 1.125rem;
    flex-shrink: 0;
    width: 24px;
    text-align: center;
}

.tts-app .voice-details {
    flex: 1;
    min-width: 0;
}

.tts-app .voice-name {
    font-size: 0.875rem;
    font-weight: 500;
    color: inherit;
    margin: 0;
    line-height: 1.3;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.tts-app .voice-locale {
    font-size: 0.75rem;
    color: inherit;
    opacity: 0.7;
    margin: 0;
    line-height: 1.2;
}

.tts-app .mobile-sheet {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1000;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease;
}

.tts-app .mobile-sheet:not(.hidden) {
    opacity: 1;
    pointer-events: auto;
}

.tts-app .sheet-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.3);
}

.tts-app .sheet-content {
    position: relative;
    background: var(--white);
    border-radius: 16px 16px 0 0;
    width: 100%;
    max-height: 60vh;
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.15);
    display: flex;
    flex-direction: column;
    transform: translateY(100%);
    transition: transform 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.tts-app .mobile-sheet:not(.hidden) .sheet-content {
    transform: translateY(0);
}

.tts-app .sheet-handle {
    width: 36px;
    height: 4px;
    background: var(--gray-300);
    border-radius: 2px;
    margin: var(--space-sm) auto;
    flex-shrink: 0;
}

.tts-app .sheet-header {
    padding: 0 var(--space-md) var(--space-md);
    border-bottom: 1px solid var(--gray-200);
    flex-shrink: 0;
}

.tts-app .sheet-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--gray-800);
    margin: 0;
    text-align: center;
}

.tts-app .speed-options-grid {
    padding: var(--space-md);
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(80px, 1fr));
    gap: var(--space-sm);
    max-height: 40vh;
    overflow-y: auto;
}

.tts-app .speed-option {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-md) var(--space-sm);
    background: var(--gray-50);
    border: 1px solid var(--gray-100);
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
    min-height: 60px;
    font-family: var(--font-main);
}

.tts-app .speed-option:hover {
    background: var(--gray-100);
    border-color: var(--gray-200);
}

.tts-app .speed-option.selected {
    background: var(--accent-blue);
    border-color: var(--accent-blue);
    color: var(--gray-900);
}

.tts-app .speed-value {
    font-size: 1rem;
    font-weight: 600;
    margin: 0;
    line-height: 1;
}

.tts-app .speed-label {
    font-size: 0.75rem;
    opacity: 0.8;
    margin: 0;
    margin-top: 2px;
    line-height: 1;
}

.tts-app .mobile-speed-feedback {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 12px 20px;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    z-index: 1002;
    pointer-events: none;
    transition: opacity 0.3s ease;
    font-family: var(--font-main);
}

.tts-app .mobile-speed-feedback.fade-out {
    opacity: 0;
}

.tts-app .touch-active {
    opacity: 0.7;
    transform: scale(0.98);
}

.tts-app .keyboard-hidden {
    transform: translateY(100%);
    transition: transform 0.3s ease;
}

.tts-app .speed-warning-active {
    color: var(--accent-orange) !important;
    font-weight: 600 !important;
}

@media (max-width: 480px) {
    .tts-app .keyboard-open .tts-content {
        flex: 1;
        padding-bottom: 0;
    }

    .tts-app .keyboard-open .tts-status-bar {
        min-height: 0;
    }
}

@media (max-width: 320px) {
    .tts-app .tts-header {
        padding: var(--space-sm);
    }

    .tts-app .mobile-controls-row {
        gap: var(--space-sm);
        padding: var(--space-xs) 0;
        max-width: calc(100vw - 2 * var(--space-sm));
        margin: 0 auto;
    }

    @media (max-width: 360px) {
        .tts-app .mobile-controls-row {
            gap: 12px;
        }

        .tts-app .mobile-controls-row .voice-button {
            width: 95px;
            min-width: 95px;
            max-width: 95px;
            justify-content: center;
        }

        .tts-app .mobile-controls-row .speed-button {
            width: 95px;
            min-width: 95px;
            max-width: 95px;
        }

        .tts-app .mobile-controls-row .play-button-primary {
            width: 46px;
            height: 46px;
            font-size: 16px;
        }
    }

    .tts-app .control-button-dynamic {
        min-height: 40px;
        font-size: 0.8125rem;
        padding: var(--space-xs) var(--space-sm);
    }

    .tts-app .mobile-controls-row .voice-button {
        width: 95px;
        min-width: 95px;
        max-width: 95px;
        justify-content: center;
    }

    .tts-app .voice-button .button-text {
        font-size: 0.8125rem;
        font-weight: 600;
    }

    .tts-app .mobile-controls-row .speed-button {
        width: 95px;
        min-width: 95px;
        max-width: 95px;
        padding-left: var(--space-xs);
        padding-right: var(--space-xs);
    }

    .tts-app .mobile-controls-row .play-button-primary {
        width: 46px;
        height: 46px;
        font-size: 16px;
    }

    .tts-app .tts-content {
        padding: var(--space-sm);
    }

    .tts-app .mobile-modal {
        padding: var(--space-sm);
    }

    .tts-app .modal-content {
        max-width: calc(100% - var(--space-md));
    }

    .tts-app .speed-options-grid {
        grid-template-columns: repeat(auto-fit, minmax(70px, 1fr));
    }
}