/**
 * Welcome Modal Styles
 *
 * A welcoming modal that introduces BanterBox features
 * when readers first enter a document.
 */

/* ===================================================================
   OVERLAY
   =================================================================== */

.welcome-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    z-index: 9998;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.welcome-overlay--visible {
    opacity: 1;
    visibility: visible;
}

/* ===================================================================
   MODAL
   =================================================================== */

.welcome-modal {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.95);
    width: 90%;
    max-width: 600px;
    max-height: 92vh;
    background: white;
    border-radius: 20px;
    box-shadow:
        0 25px 50px rgba(0, 0, 0, 0.25),
        0 10px 20px rgba(0, 0, 0, 0.15);
    z-index: 9999;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s ease;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.welcome-modal--visible {
    opacity: 1;
    visibility: visible;
    transform: translate(-50%, -50%) scale(1);
}

/* ===================================================================
   HEADER
   =================================================================== */

.welcome-modal__header {
    text-align: center;
    padding: 32px 32px 24px;
    background: linear-gradient(135deg, var(--color-primary-800, #0F2B51) 0%, var(--color-primary-700, #163A6B) 100%);
    color: white;
}

.welcome-modal__title {
    margin: 0 0 8px;
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.2;
}

.welcome-modal__doc-title {
    display: block;
    font-size: 1.5rem;
    margin-top: 4px;
}

.welcome-modal__subtitle {
    margin: 0;
    font-size: 1rem;
    opacity: 0.85;
    font-weight: 400;
}

/* ===================================================================
   CONTENT
   =================================================================== */

.welcome-modal__content {
    padding: 24px 32px;
    overflow-y: auto;
    flex: 1;
}

.welcome-intro {
    margin: 0 0 20px;
    font-size: 0.8125rem;
    line-height: 1.5;
    color: var(--color-gray-500, #6B7280);
    font-style: italic;
    text-align: center;
}

/* Feature Cards */
.welcome-features {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.welcome-feature {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    padding: 16px;
    background: var(--color-gray-50, #F9FAFB);
    border-radius: 12px;
    border: 1px solid var(--color-gray-100, #F3F4F6);
}

.welcome-feature__icon {
    font-size: 1.5rem;
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: white;
    border-radius: 10px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.welcome-feature__text {
    flex: 1;
    min-width: 0;
}

.welcome-feature__text strong {
    display: block;
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--color-gray-900, #111827);
    margin-bottom: 4px;
}

.welcome-feature__text p {
    margin: 0;
    font-size: 0.875rem;
    line-height: 1.5;
    color: var(--color-gray-600, #4B5563);
}

.welcome-feature__link {
    align-self: center;
    padding: 6px 12px;
    background: transparent;
    border: 1px solid var(--color-primary-300, #9BB4D2);
    border-radius: 6px;
    color: var(--color-primary-700, #163A6B);
    font-size: 0.8125rem;
    font-weight: 500;
    cursor: pointer;
    white-space: nowrap;
    transition: all 0.2s ease;
}

.welcome-feature__link:hover {
    background: var(--color-primary-50, #E6EBF2);
    border-color: var(--color-primary-500, #2659A0);
}


/* ===================================================================
   TABS
   =================================================================== */

.welcome-tabs {
    display: flex;
    border-bottom: 2px solid var(--color-gray-200, #E5E7EB);
    margin-bottom: 16px;
}

.welcome-tab {
    flex: 1;
    padding: 10px 8px;
    text-align: center;
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--color-gray-500, #6B7280);
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    cursor: pointer;
    transition: color 0.2s ease, border-color 0.2s ease;
}

.welcome-tab--active {
    color: var(--color-primary-700, #163A6B);
    border-bottom-color: var(--color-primary-700, #163A6B);
}

.welcome-tab:hover:not(.welcome-tab--active) {
    color: var(--color-gray-700, #374151);
}

/* Tab panels */
.welcome-tab-panel {
    display: none;
}

.welcome-tab-panel--active {
    display: block;
}

/* ===================================================================
   COMPACT SELECTORS (used inside tabs or flat layout)
   =================================================================== */

.welcome-selector {
    margin-bottom: 14px;
}

.welcome-selector:last-child {
    margin-bottom: 0;
}

.welcome-selector__label {
    display: block;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--color-gray-700, #374151);
    margin-bottom: 6px;
}

/* ===================================================================
   INLINE AUDIO OPTIONS (inside Audio tab)
   =================================================================== */

.welcome-audio-options {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.welcome-audio-option {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px;
    background: var(--color-gray-50, #F9FAFB);
    border-radius: 10px;
    border: 1px solid var(--color-gray-100, #F3F4F6);
}

.welcome-audio-option__icon {
    font-size: 1.5rem;
    flex-shrink: 0;
    width: 36px;
    text-align: center;
}

.welcome-audio-option__info {
    flex: 1;
    min-width: 0;
}

.welcome-audio-option__title {
    margin: 0;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-gray-900, #111827);
}

.welcome-audio-option__desc {
    margin: 2px 0 0;
    font-size: 0.75rem;
    color: var(--color-gray-500, #6B7280);
    line-height: 1.4;
}

.welcome-audio-option__action {
    flex-shrink: 0;
}

/* TTS Toggle */
.welcome-audio-toggle {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 10px;
    background: var(--color-gray-200, #E5E7EB);
    border: none;
    border-radius: 20px;
    cursor: pointer;
    transition: background 0.2s ease;
}

.welcome-audio-toggle__label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-gray-600, #4B5563);
    min-width: 20px;
    text-align: center;
}

.welcome-audio-toggle__switch {
    width: 32px;
    height: 18px;
    background: var(--color-gray-400, #9CA3AF);
    border-radius: 9px;
    position: relative;
    transition: background 0.2s ease;
}

.welcome-audio-toggle__knob {
    position: absolute;
    top: 2px;
    left: 2px;
    width: 14px;
    height: 14px;
    background: white;
    border-radius: 50%;
    transition: transform 0.2s ease;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.15);
}

.welcome-audio-toggle--active {
    background: var(--color-primary-100, #D1DCE8);
}

.welcome-audio-toggle--active .welcome-audio-toggle__label {
    color: var(--color-primary-700, #163A6B);
}

.welcome-audio-toggle--active .welcome-audio-toggle__switch {
    background: var(--color-primary-600, #1E4A86);
}

.welcome-audio-toggle--active .welcome-audio-toggle__knob {
    transform: translateX(14px);
}

/* Audiobook player button */
.welcome-audio-player-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    font-size: 0.8125rem;
    font-weight: 500;
    color: white;
    background: var(--color-primary-700, #163A6B);
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: background 0.2s ease;
    white-space: nowrap;
}

.welcome-audio-player-btn:hover {
    background: var(--color-primary-800, #0F2B51);
}

/* Grade level button group (education mode) */
.welcome-feature--grade-level {
    flex-wrap: wrap;
}

.welcome-grade-buttons {
    display: flex;
    gap: 0;
    width: 100%;
    margin-top: 4px;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid var(--color-primary-200, #B8CCDF);
}

.welcome-grade-btn {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 8px 4px;
    background: white;
    border: none;
    border-right: 1px solid var(--color-primary-200, #B8CCDF);
    cursor: pointer;
    transition: all 0.15s ease;
    min-width: 0;
}

.welcome-grade-btn:last-child {
    border-right: none;
}

.welcome-grade-btn__label {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--color-primary-700, #163A6B);
    line-height: 1.2;
}

.welcome-grade-btn__sub {
    font-size: 0.6875rem;
    color: var(--color-gray-500, #6B7280);
    line-height: 1.2;
    margin-top: 1px;
}

.welcome-grade-btn:hover {
    background: var(--color-primary-50, #E6EBF2);
}

.welcome-grade-btn--active {
    background: var(--color-primary-700, #163A6B);
}

.welcome-grade-btn--active .welcome-grade-btn__label {
    color: white;
}

.welcome-grade-btn--active .welcome-grade-btn__sub {
    color: rgba(255, 255, 255, 0.75);
}

.welcome-grade-btn--active:hover {
    background: var(--color-primary-800, #0F2B51);
}

/* Language button group — mirrors grade level pattern */
.welcome-feature--language {
    flex-wrap: wrap;
}

.welcome-lang-buttons {
    display: flex;
    gap: 0;
    width: 100%;
    margin-top: 4px;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid var(--color-primary-200, #B8CCDF);
}

.welcome-lang-btn {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 8px 4px;
    background: white;
    border: none;
    border-right: 1px solid var(--color-primary-200, #B8CCDF);
    cursor: pointer;
    transition: all 0.15s ease;
    min-width: 0;
}

.welcome-lang-btn:last-child {
    border-right: none;
}

.welcome-lang-btn__label {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--color-primary-700, #163A6B);
    line-height: 1.2;
}

.welcome-lang-btn__sub {
    font-size: 0.6875rem;
    color: var(--color-gray-500, #6B7280);
    line-height: 1.2;
    margin-top: 1px;
}

.welcome-lang-btn:hover {
    background: var(--color-primary-50, #E6EBF2);
}

.welcome-lang-btn--active {
    background: var(--color-primary-700, #163A6B);
}

.welcome-lang-btn--active .welcome-lang-btn__label {
    color: white;
}

.welcome-lang-btn--active .welcome-lang-btn__sub {
    color: rgba(255, 255, 255, 0.75);
}

.welcome-lang-btn--active:hover {
    background: var(--color-primary-800, #0F2B51);
}

/* ===================================================================
   FOOTER
   =================================================================== */

.welcome-modal__footer {
    padding: 20px 32px 28px;
    border-top: 1px solid var(--color-gray-100, #F3F4F6);
    background: var(--color-gray-50, #F9FAFB);
    text-align: center;
}

.welcome-footer-text {
    margin: 0 0 16px;
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--color-gray-700, #374151);
}

.welcome-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
}

.welcome-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    font-size: 0.9375rem;
    font-weight: 600;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.2s ease;
    border: none;
}

.welcome-btn__icon {
    font-size: 1.125rem;
}

.welcome-btn--primary {
    background: var(--color-primary-700, #163A6B);
    color: white;
    box-shadow: 0 2px 8px rgba(22, 58, 107, 0.25);
}

.welcome-btn--primary:hover {
    background: var(--color-primary-800, #0F2B51);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(22, 58, 107, 0.3);
}

.welcome-btn--secondary {
    background: white;
    color: var(--color-primary-700, #163A6B);
    border: 2px solid var(--color-primary-200, #9BB4D2);
}

.welcome-btn--secondary:hover {
    border-color: var(--color-primary-500, #2659A0);
    background: var(--color-primary-50, #E6EBF2);
}

.welcome-skip-hint {
    margin: 16px 0 0;
    font-size: 0.8125rem;
    color: var(--color-gray-500, #6B7280);
}

.welcome-skip-hint kbd {
    display: inline-block;
    padding: 2px 6px;
    background: var(--color-gray-200, #E5E7EB);
    border-radius: 4px;
    font-family: inherit;
    font-size: 0.75rem;
}

/* AI Disclosure */
.welcome-disclosure {
    margin: 16px 0 0;
    font-size: 0.6875rem;
    font-style: italic;
    color: var(--color-gray-400, #9CA3AF);
    line-height: 1.5;
}

.welcome-disclosure a {
    color: var(--color-gray-500, #6B7280);
    text-decoration: underline;
}

.welcome-disclosure a:hover {
    color: var(--color-primary-600, #1E4A86);
}

/* ===================================================================
   SHORT VIEWPORT (small laptops, e.g. 1366×768)
   =================================================================== */

@media (max-height: 800px) {
    .welcome-modal__header {
        padding: 20px 28px 16px;
    }

    .welcome-modal__title {
        font-size: 1.5rem;
    }

    .welcome-modal__doc-title {
        font-size: 1.25rem;
    }

    .welcome-modal__content {
        padding: 16px 28px;
    }

    .welcome-intro {
        margin-bottom: 12px;
    }

    .welcome-features {
        gap: 10px;
    }

    .welcome-feature {
        padding: 12px;
    }

    .welcome-tabs {
        margin-bottom: 12px;
    }

    .welcome-tab {
        padding: 8px 6px;
        font-size: 0.8125rem;
    }

    .welcome-selector {
        margin-bottom: 10px;
    }

    .welcome-audio-option {
        padding: 10px;
        gap: 10px;
    }

    .welcome-modal__footer {
        padding: 14px 28px 18px;
    }

    .welcome-footer-text {
        margin-bottom: 10px;
    }

    .welcome-btn {
        padding: 10px 20px;
    }

    .welcome-skip-hint {
        margin-top: 10px;
    }
}

/* ===================================================================
   MOBILE ADJUSTMENTS
   =================================================================== */

@media (max-width: 640px) {
    .welcome-modal {
        width: calc(100% - 32px);
        max-height: calc(100vh - 32px);
        border-radius: 16px;
    }

    .welcome-modal__header {
        padding: 24px 20px 20px;
    }

    .welcome-modal__title {
        font-size: 1.5rem;
    }

    .welcome-modal__doc-title {
        font-size: 1.25rem;
    }

    .welcome-modal__content {
        padding: 20px;
    }

    .welcome-feature {
        flex-direction: column;
        gap: 12px;
    }

    /* Hide feature icons on mobile */
    .welcome-feature__icon {
        display: none;
    }

    .welcome-feature__link {
        align-self: flex-start;
        /* Touch target minimum */
        min-height: 44px;
        padding: 10px 16px;
    }

    .welcome-grade-btn {
        min-height: 44px;
        padding: 10px 4px;
    }

    .welcome-lang-btn {
        /* Touch target minimum */
        min-height: 44px;
        padding: 10px 4px;
    }

    .welcome-tabs {
        margin-bottom: 12px;
    }

    .welcome-tab {
        min-height: 44px;
        padding: 10px 6px;
    }

    .welcome-audio-option {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
        padding: 12px;
    }

    .welcome-audio-option__action {
        width: 100%;
    }

    .welcome-audio-toggle,
    .welcome-audio-player-btn {
        width: 100%;
        justify-content: center;
        min-height: 44px;
    }

    .welcome-modal__footer {
        padding: 16px 20px calc(24px + env(safe-area-inset-bottom, 0));
    }

    .welcome-actions {
        flex-direction: column;
        gap: 10px;
    }

    .welcome-btn {
        width: 100%;
        /* Touch target minimum */
        min-height: 48px;
        padding: 14px 24px;
    }

    /* Hide keyboard hint on mobile - no physical keyboard */
    .welcome-skip-hint {
        display: none;
    }
}

/* Very small screens - centered modal (not bottom sheet) */
@media (max-width: 480px) {
    .welcome-modal {
        /* Stay centered, not bottom sheet */
        position: fixed;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%) scale(0.95);
        width: calc(100% - 24px);
        max-width: 100%;
        max-height: calc(100vh - 48px);
        border-radius: 16px;
    }

    .welcome-modal--visible {
        transform: translate(-50%, -50%) scale(1);
    }

    .welcome-modal__header {
        padding: 20px 16px 16px;
    }

    .welcome-modal__title {
        font-size: 1.25rem;
    }

    .welcome-modal__doc-title {
        font-size: 1.125rem;
    }

    .welcome-modal__subtitle {
        font-size: 0.875rem;
    }

    .welcome-modal__content {
        padding: 16px;
        /* Ensure scrollable on small screens */
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
    }

    .welcome-intro {
        font-size: 0.75rem;
        margin-bottom: 16px;
    }

    .welcome-features {
        gap: 10px;
    }

    .welcome-feature {
        padding: 12px;
        gap: 10px;
        /* Keep vertical layout for better spacing */
        flex-direction: column;
        align-items: flex-start;
    }

    .welcome-feature__icon {
        width: 36px;
        height: 36px;
        font-size: 1.25rem;
        border-radius: 8px;
    }

    .welcome-feature__text {
        flex: 1;
    }

    .welcome-feature__text strong {
        font-size: 0.875rem;
        margin-bottom: 2px;
    }

    .welcome-feature__text p {
        font-size: 0.8125rem;
    }

    .welcome-feature__link {
        min-height: 40px;
        padding: 8px 14px;
        font-size: 0.8125rem;
    }

    .welcome-modal__footer {
        padding: 16px calc(16px + env(safe-area-inset-bottom, 0));
    }

    .welcome-footer-text {
        font-size: 0.875rem;
        margin-bottom: 12px;
    }

    .welcome-btn {
        font-size: 0.875rem;
        min-height: 44px;
        padding: 12px 20px;
    }

    /* Show disclosure but smaller */
    .welcome-disclosure {
        font-size: 0.625rem;
        margin-top: 12px;
    }
}

/* Extra small screens - tighter spacing but still centered */
@media (max-width: 375px) {
    .welcome-modal {
        width: calc(100% - 16px);
        max-height: calc(100vh - 32px);
    }

    .welcome-modal__header {
        padding: 16px 14px 12px;
    }

    .welcome-modal__title {
        font-size: 1.125rem;
    }

    .welcome-modal__doc-title {
        font-size: 1rem;
    }

    .welcome-modal__subtitle {
        font-size: 0.8125rem;
    }

    .welcome-modal__content {
        padding: 12px 14px;
    }

    .welcome-intro {
        font-size: 0.6875rem;
        margin-bottom: 12px;
    }

    .welcome-features {
        gap: 8px;
    }

    .welcome-feature {
        padding: 10px;
        gap: 8px;
    }

    .welcome-feature__icon {
        width: 32px;
        height: 32px;
        font-size: 1.125rem;
    }

    .welcome-feature__text strong {
        font-size: 0.8125rem;
    }

    .welcome-feature__text p {
        font-size: 0.75rem;
    }

    .welcome-feature__link {
        min-height: 36px;
        padding: 6px 12px;
        font-size: 0.75rem;
    }

    .welcome-modal__footer {
        padding: 12px 14px calc(12px + env(safe-area-inset-bottom, 0));
    }

    .welcome-footer-text {
        font-size: 0.8125rem;
        margin-bottom: 10px;
    }

    .welcome-actions {
        gap: 8px;
    }

    .welcome-btn {
        font-size: 0.8125rem;
        min-height: 42px;
        padding: 10px 16px;
    }

    .welcome-disclosure {
        display: none;
    }
}

/* Touch device optimizations */
@media (hover: none) {
    .welcome-btn--primary:hover {
        transform: none;
    }

    .welcome-btn:active {
        transform: scale(0.98);
    }

    .welcome-feature__link:active,
    .welcome-lang-btn:active,
    .welcome-grade-btn:active,
    .welcome-tab:active,
    .welcome-audio-player-btn:active {
        background: var(--color-primary-100, #D1DCE8);
    }
}

/* ===================================================================
   REDUCED MOTION
   =================================================================== */

@media (prefers-reduced-motion: reduce) {
    .welcome-modal {
        transition: opacity 0.1s ease;
        transform: translate(-50%, -50%);
    }

    .welcome-modal--visible {
        transform: translate(-50%, -50%);
    }

    .welcome-btn--primary:hover,
    .welcome-btn:active {
        transform: none;
    }

    .welcome-overlay {
        transition: opacity 0.1s ease;
    }
}

/* Reduced motion + small screens (centered modal) */
@media (prefers-reduced-motion: reduce) and (max-width: 480px) {
    .welcome-modal {
        transform: translate(-50%, -50%);
    }

    .welcome-modal--visible {
        transform: translate(-50%, -50%);
    }
}

/* ===================================================================
   DARK MODE
   =================================================================== */

@media (prefers-color-scheme: dark) {
    .welcome-modal {
        background: var(--color-gray-800, #1F2937);
    }

    .welcome-modal__header {
        background: linear-gradient(135deg, var(--color-gray-900, #111827) 0%, var(--color-gray-800, #1F2937) 100%);
    }

    .welcome-intro {
        color: var(--color-gray-500, #6B7280);
    }

    .welcome-feature {
        background: var(--color-gray-900, #111827);
        border-color: var(--color-gray-700, #374151);
    }

    .welcome-feature__icon {
        background: var(--color-gray-800, #1F2937);
    }

    .welcome-feature__text strong {
        color: white;
    }

    .welcome-feature__text p {
        color: var(--color-gray-400, #9CA3AF);
    }

    .welcome-feature__link {
        color: var(--color-primary-300, #9BB4D2);
        border-color: var(--color-gray-600, #4B5563);
    }

    .welcome-feature__link:hover {
        background: var(--color-gray-700, #374151);
    }

    .welcome-lang-buttons {
        border-color: var(--color-gray-600, #4B5563);
    }

    .welcome-lang-btn {
        background: var(--color-gray-800, #1F2937);
        border-color: var(--color-gray-600, #4B5563);
    }

    .welcome-lang-btn__label {
        color: var(--color-primary-300, #9BB4D2);
    }

    .welcome-lang-btn__sub {
        color: var(--color-gray-500, #6B7280);
    }

    .welcome-lang-btn:hover {
        background: var(--color-gray-700, #374151);
    }

    .welcome-lang-btn--active {
        background: var(--color-primary-600, #1E4A86);
    }

    .welcome-lang-btn--active .welcome-lang-btn__label {
        color: white;
    }

    .welcome-lang-btn--active .welcome-lang-btn__sub {
        color: rgba(255, 255, 255, 0.7);
    }

    .welcome-lang-btn--active:hover {
        background: var(--color-primary-700, #163A6B);
    }

    .welcome-grade-buttons {
        border-color: var(--color-gray-600, #4B5563);
    }

    .welcome-grade-btn {
        background: var(--color-gray-800, #1F2937);
        border-color: var(--color-gray-600, #4B5563);
    }

    .welcome-grade-btn__label {
        color: var(--color-primary-300, #9BB4D2);
    }

    .welcome-grade-btn__sub {
        color: var(--color-gray-500, #6B7280);
    }

    .welcome-grade-btn:hover {
        background: var(--color-gray-700, #374151);
    }

    .welcome-grade-btn--active {
        background: var(--color-primary-600, #1E4A86);
    }

    .welcome-grade-btn--active .welcome-grade-btn__label {
        color: white;
    }

    .welcome-grade-btn--active .welcome-grade-btn__sub {
        color: rgba(255, 255, 255, 0.7);
    }

    .welcome-grade-btn--active:hover {
        background: var(--color-primary-700, #163A6B);
    }

    /* Tabs */
    .welcome-tabs {
        border-bottom-color: var(--color-gray-700, #374151);
    }

    .welcome-tab {
        color: var(--color-gray-500, #6B7280);
    }

    .welcome-tab--active {
        color: var(--color-primary-300, #9BB4D2);
        border-bottom-color: var(--color-primary-400, #4D7BB0);
    }

    .welcome-tab:hover:not(.welcome-tab--active) {
        color: var(--color-gray-300, #D1D5DB);
    }

    /* Compact selectors */
    .welcome-selector__label {
        color: var(--color-gray-400, #9CA3AF);
    }

    /* Inline audio options */
    .welcome-audio-option {
        background: var(--color-gray-900, #111827);
        border-color: var(--color-gray-700, #374151);
    }

    .welcome-audio-option__title {
        color: white;
    }

    .welcome-audio-option__desc {
        color: var(--color-gray-500, #6B7280);
    }

    .welcome-audio-toggle {
        background: var(--color-gray-700, #374151);
    }

    .welcome-audio-toggle__label {
        color: var(--color-gray-400, #9CA3AF);
    }

    .welcome-audio-toggle__switch {
        background: var(--color-gray-600, #4B5563);
    }

    .welcome-audio-toggle--active {
        background: var(--color-primary-900, #0A1E3D);
    }

    .welcome-audio-toggle--active .welcome-audio-toggle__label {
        color: var(--color-primary-300, #9BB4D2);
    }

    .welcome-audio-toggle--active .welcome-audio-toggle__switch {
        background: var(--color-primary-500, #2659A0);
    }

    .welcome-audio-player-btn {
        background: var(--color-primary-600, #1E4A86);
    }

    .welcome-audio-player-btn:hover {
        background: var(--color-primary-700, #163A6B);
    }

    .welcome-modal__footer {
        background: var(--color-gray-900, #111827);
        border-color: var(--color-gray-700, #374151);
    }

    .welcome-footer-text {
        color: var(--color-gray-300, #D1D5DB);
    }

    .welcome-btn--secondary {
        background: var(--color-gray-800, #1F2937);
        color: white;
        border-color: var(--color-gray-600, #4B5563);
    }

    .welcome-btn--secondary:hover {
        background: var(--color-gray-700, #374151);
    }

    .welcome-skip-hint {
        color: var(--color-gray-500, #6B7280);
    }

    .welcome-skip-hint kbd {
        background: var(--color-gray-700, #374151);
    }

    .welcome-disclosure {
        color: var(--color-gray-500, #6B7280);
    }

    .welcome-disclosure a {
        color: var(--color-gray-400, #9CA3AF);
    }
}

/* ===================================================================
   HEADER TOUR BUTTON
   =================================================================== */

.header-btn--tour {
    position: relative;
}

.header-btn--tour .btn-icon {
    font-size: 1rem;
}

/* Pulse animation for first-time visitors */
.header-btn--tour.pulse::after {
    content: '';
    position: absolute;
    inset: -4px;
    border-radius: 50%;
    border: 2px solid var(--color-primary-400, #4D7BB0);
    animation: tourPulse 2s ease-in-out infinite;
}

@keyframes tourPulse {
    0%, 100% {
        opacity: 0;
        transform: scale(0.8);
    }
    50% {
        opacity: 0.5;
        transform: scale(1.2);
    }
}