:root {
    --bg-main: #0b0b0e;
    --bg-card: #1c1c24;
    --bg-input: #121217;
    --primary: #635bff;
    --primary-hover: #7b75ff;
    --text-main: #ffffff;
    --text-muted: #9ca3af;
    --border-color: #2d2d3a;
    --danger: #ff4b4b;
    --success: #10b981;
    --transition: all 0.2s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

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

.hidden {
    display: none !important;
}

.app-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* --- Top Navbar --- */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 3rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

.nav-toggle-group {
    display: flex;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 4px;
}

.nav-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    padding: 8px 16px;
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: 6px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-btn:hover {
    color: var(--text-main);
}

.nav-btn.active {
    background: var(--bg-card);
    color: var(--text-main);
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

/* --- Main Content --- */
.main-content {
    flex: 1;
    padding: 3rem;
    display: flex;
    justify-content: center;
}

.card-container {
    width: 100%;
    max-width: 650px;
}

.main-card {
    background: var(--bg-card);
    border-radius: 12px;
    padding: 2.5rem;
    border: 1px solid rgba(255, 255, 255, 0.03);
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
}

.main-card h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 2rem;
    letter-spacing: -0.5px;
}

/* --- Forms & Inputs --- */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 500;
}

.input-type-toggle {
    display: flex;
    gap: 10px;
}

.toggle-btn {
    flex: 1;
    padding: 14px;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.toggle-btn:hover {
    border-color: rgba(99, 91, 255, 0.5);
}

.toggle-btn.active {
    border-color: var(--primary);
    color: var(--primary);
    background: rgba(99, 91, 255, 0.05);
}

input[type="text"],
input[type="url"],
input[type="number"],
select {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-main);
    font-size: 0.95rem;
    outline: none;
    transition: var(--transition);
    appearance: none;
}

select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%239ca3af'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 16px;
    padding-right: 40px;
}

input:focus, select:focus {
    border-color: var(--primary);
}

.settings-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.speaker-row {
    display: flex;
    gap: 10px;
    margin-bottom: 12px;
    align-items: center;
}

.speaker-row input {
    flex: 2;
}

.speaker-row select {
    flex: 1.5;
}

.delete-btn {
    background: transparent;
    border: none;
    color: var(--danger);
    font-size: 1.1rem;
    cursor: pointer;
    padding: 8px;
    border-radius: 6px;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.delete-btn:hover {
    background: rgba(255, 75, 75, 0.1);
}

.dashed-btn {
    width: 100%;
    padding: 12px;
    background: transparent;
    border: 1px dashed var(--border-color);
    color: var(--text-muted);
    border-radius: 8px;
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-top: 10px;
}

.dashed-btn:hover {
    border-color: var(--text-muted);
    color: var(--text-main);
}

.submit-btn {
    width: 100%;
    padding: 14px;
    margin-top: 1rem;
    border: none;
    border-radius: 8px;
    background: linear-gradient(135deg, #7b75ff 0%, #635bff 100%);
    color: white;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 4px 15px rgba(99, 91, 255, 0.3);
}

.submit-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(99, 91, 255, 0.4);
}

.submit-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

/* --- Status & Progress --- */
.status-container {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    text-align: center;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(5px); }
    to { opacity: 1; transform: translateY(0); }
}

.progress-bar-bg {
    height: 6px;
    background: var(--bg-input);
    border-radius: 3px;
    margin: 1.2rem 0;
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    width: 0%;
    background: var(--primary);
    border-radius: 3px;
    transition: width 0.4s ease;
}

.status-message {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.result-container {
    margin-top: 1.5rem;
    background: rgba(99, 91, 255, 0.05);
    padding: 1.5rem;
    border-radius: 8px;
    border: 1px solid rgba(99, 91, 255, 0.2);
}

.result-container h4 {
    margin-bottom: 10px;
    color: var(--primary);
}

.custom-audio-player {
    width: 100%;
    height: 40px;
}

/* --- Library / History Tab --- */
.library-container {
    width: 100%;
    max-width: 900px;
}

.library-container h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 2rem;
}

.empty-state {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 3rem;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.95rem;
}

.history-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 1.5rem;
}

.history-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    transition: var(--transition);
}

.history-card:hover {
    border-color: rgba(99, 91, 255, 0.3);
}

.history-card-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 1rem;
}

.history-icon {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    background: rgba(99, 91, 255, 0.1);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
}

.history-card h3 {
    font-size: 1rem;
    font-weight: 600;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.history-actions {
    display: flex;
    gap: 10px;
    margin-top: 1rem;
}

.action-btn {
    flex: 1;
    padding: 10px;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.85rem;
    transition: var(--transition);
}

.action-btn:hover {
    background: rgba(255,255,255,0.05);
}

/* --- Modal --- */
.modal {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.7);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
}

.modal-content {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    width: 90%;
    max-width: 700px;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
}

.modal-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.icon-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 1.2rem;
    cursor: pointer;
    transition: var(--transition);
}

.icon-btn:hover {
    color: var(--text-main);
}

.preview-btn {
    background: rgba(99, 91, 255, 0.1);
    color: var(--primary);
    border-radius: 50%;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(99, 91, 255, 0.2);
}

.preview-btn:hover {
    background: rgba(99, 91, 255, 0.2);
    color: var(--primary-hover);
}

.modal-body {
    padding: 1.5rem;
    overflow-y: auto;
}

pre {
    background: var(--bg-input);
    padding: 1.5rem;
    border-radius: 8px;
    white-space: pre-wrap;
    word-wrap: break-word;
    color: var(--text-muted);
    font-size: 0.9rem;
    line-height: 1.6;
    border: 1px solid var(--border-color);
}

/* --- Trait Chips --- */
.traits-container {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 8px;
}

.trait-chip {
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    padding: 8px 16px;
    border-radius: 20px; /* Pill shape */
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.trait-chip:hover {
    border-color: rgba(99, 91, 255, 0.5);
    color: var(--text-main);
}

.trait-chip.active {
    background: rgba(99, 91, 255, 0.15);
    border-color: var(--primary);
    color: var(--primary);
}