/**
 * Modern Premium Dashboard UI Stylesheet Ecosystem
 */

:root {
    --tts-bg-primary: #f8fafc;
    --tts-card-bg: #ffffff;
    --tts-txt-color: #1e293b;
    --tts-txt-muted: #64748b;
    --tts-border: #e2e8f0;
    --tts-primary-grad: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
    --tts-primary-hover: linear-gradient(135deg, #4338ca 0%, #6d28d9 100%);
    --tts-success-btn: #10b981;
    --tts-danger-btn: #ef4444;
    --tts-radius: 12px;
    --tts-shadow: 0 4px 6px -1px rgba(0,0,0,0.05), 0 2px 4px -1px rgba(0,0,0,0.03);
    --tts-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark Mode Framework Override Configs */
.tts-dark-mode {
    --tts-bg-primary: #0f172a;
    --tts-card-bg: #1e293b;
    --tts-txt-color: #f1f5f9;
    --tts-txt-muted: #94a3b8;
    --tts-border: #334155;
    --tts-shadow: 0 10px 15px -3px rgba(0,0,0,0.3);
}

.tts-container {
    background: var(--tts-bg-primary);
    color: var(--tts-txt-color);
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    padding: 30px;
    border-radius: var(--tts-radius);
    box-shadow: var(--tts-shadow);
    max-width: 1200px;
    margin: 20px auto;
    transition: var(--tts-transition);
}

.tts-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 2px solid var(--tts-border);
    padding-bottom: 20px;
    margin-bottom: 25px;
}

.tts-header h2 {
    margin: 0;
    font-size: 24px;
    font-weight: 700;
    background: var(--tts-primary-grad);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.tts-layout {
    display: grid;
    grid-template-columns: 7fr 5fr;
    gap: 25px;
}

@media (max-width: 992px) {
    .tts-layout {
        grid-template-columns: 1fr;
    }
}

.tts-card {
    background: var(--tts-card-bg);
    border: 1px solid var(--tts-border);
    border-radius: var(--tts-radius);
    padding: 20px;
    margin-bottom: 25px;
    box-shadow: var(--tts-shadow);
    transition: var(--tts-transition);
}

.tts-card h3 {
    margin-top: 0;
    margin-bottom: 20px;
    font-size: 16px;
    font-weight: 600;
    border-bottom: 1px solid var(--tts-border);
    padding-bottom: 10px;
}

.tts-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.tts-file-actions {
    display: flex;
    gap: 8px;
}

textarea id="tts-text-input", 
#tts-text-input {
    width: 100%;
    height: 220px;
    background: var(--tts-bg-primary);
    color: var(--tts-txt-color);
    border: 1px solid var(--tts-border);
    border-radius: 8px;
    padding: 15px;
    font-size: 15px;
    resize: vertical;
    box-sizing: border-box;
    transition: var(--tts-transition);
}

#tts-text-input:focus {
    outline: none;
    border-color: #6366f1;
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

.tts-editor-footer {
    display: flex;
    justify-content: space-between;
    margin-top: 12px;
}

/* Form Settings Layout Grid */
.tts-grid-settings {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
}

@media (max-width: 576px) {
    .tts-grid-settings {
        grid-template-columns: 1fr;
    }
}

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

.tts-group label {
    font-size: 13px;
    font-weight: 600;
    color: var(--tts-txt-muted);
}

.tts-group select {
    background: var(--tts-bg-primary);
    color: var(--tts-txt-color);
    border: 1px solid var(--tts-border);
    padding: 10px;
    border-radius: 6px;
    outline: none;
    font-size: 14px;
}

.tts-checkbox-wrapper {
    margin: 15px 0;
    font-size: 13px;
    color: var(--tts-txt-muted);
}

/* Button UI Definitions */
.tts-btn-primary {
    width: 100%;
    background: var(--tts-primary-grad);
    color: #ffffff;
    border: none;
    padding: 14px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    transition: var(--tts-transition);
}

.tts-btn-primary:hover {
    background: var(--tts-primary-hover);
    transform: translateY(-1px);
}

.tts-btn-secondary, .tts-btn-small, .tts-file-upload-btn {
    background: var(--tts-border);
    color: var(--tts-txt-color);
    border: none;
    padding: 8px 14px;
    border-radius: 6px;
    font-size: 13px;
    cursor: pointer;
    font-weight: 500;
    transition: var(--tts-transition);
}

.tts-file-upload-btn {
    display: inline-block;
}

.tts-btn-secondary:hover, .tts-btn-small:hover, .tts-file-upload-btn:hover {
    filter: brightness(0.9);
}

.tts-btn-danger {
    background: var(--tts-danger-btn);
    color: #ffffff;
    border: none;
    padding: 8px 14px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 13px;
    transition: var(--tts-transition);
}

.tts-btn-success {
    background: var(--tts-success-btn);
    color: #ffffff;
    border: none;
    padding: 12px 20px;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    width: 100%;
    transition: var(--tts-transition);
}

.tts-btn-success:disabled {
    background: var(--tts-border);
    color: var(--tts-txt-muted);
    cursor: not-allowed;
}

/* Statistics Visual Styling */
.tts-stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.tts-stat-card {
    background: var(--tts-bg-primary);
    border: 1px solid var(--tts-border);
    border-radius: 8px;
    padding: 12px;
    text-align: center;
}

.tts-stat-num {
    display: block;
    font-size: 18px;
    font-weight: 700;
    color: #4f46e5;
}

.tts-stat-lbl {
    font-size: 11px;
    color: var(--tts-txt-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Custom Embedded Audio Player Console Layout */
.tts-custom-player {
    background: var(--tts-bg-primary);
    border: 1px solid var(--tts-border);
    border-radius: var(--tts-radius);
    padding: 15px;
    margin-bottom: 15px;
}

.tts-player-timeline {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 15px;
    font-size: 12px;
    color: var(--tts-txt-muted);
}

.tts-player-timeline input[type="range"] {
    flex-grow: 1;
    accent-color: #4f46e5;
}

.tts-player-controls {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
    margin-bottom: 15px;
}

.tts-ctrl-btn {
    background: none;
    border: none;
    color: var(--tts-txt-color);
    font-size: 18px;
    cursor: pointer;
    transition: var(--tts-transition);
}

.tts-ctrl-btn:hover {
    color: #4f46e5;
}

.tts-ctrl-btn.main-ctrl {
    background: var(--tts-primary-grad);
    color: #ffffff;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: 0 4px 10px rgba(79, 70, 229, 0.3);
}

.tts-ctrl-btn.main-ctrl:hover {
    color: #ffffff;
    transform: scale(1.05);
}

.tts-volume-panel {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    font-size: 12px;
    color: var(--tts-txt-muted);
}

.tts-volume-panel input[type="range"] {
    width: 80px;
    accent-color: #4f46e5;
}

.tts-download-matrix {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 15px;
}

/* Session History Dashboard Log list */
.tts-history-wrapper {
    list-style: none;
    padding: 0;
    margin: 0;
    max-height: 150px;
    overflow-y: auto;
}

.tts-history-wrapper li {
    padding: 8px 12px;
    border-bottom: 1px solid var(--tts-border);
    font-size: 13px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.empty-log-msg {
    color: var(--tts-txt-muted);
    text-align: center;
    font-style: italic;
}

/* System loading component elements */
.tts-spinner {
    border: 3px solid rgba(255,255,255,0.3);
    border-radius: 50%;
    border-top: 3px solid #ffffff;
    width: 20px;
    height: 20px;
    animation: tts_spin 0.8s linear infinite;
}

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

.tts-warning-box {
    background: #fffbeb;
    border: 1px solid #fef3c7;
    color: #b45309;
    padding: 15px;
    border-radius: 8px;
    margin: 15px auto;
    font-weight: 500;
}