/* ============================================================
   Anthurium MCAT - Flashcard Builder Styles
   ============================================================ */

.builder-main {
    padding-bottom: 100px;
}

.glass {
    background: linear-gradient(145deg, rgba(255, 255, 255, .07), rgba(255, 255, 255, .02));
    border: 1px solid rgba(255, 255, 255, .08);
    backdrop-filter: blur(12px);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

.builder-card {
    padding: 40px;
    margin-top: -40px;
    position: relative;
    z-index: 10;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.builder-inputs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-bottom: 24px;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.input-group label {
    font-family: var(--font-heading);
    font-size: .85rem;
    font-weight: 600;
    color: var(--teal);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.input-group textarea,
.rich-editor {
    background: rgba(20, 28, 64, .5);
    border: 1px solid rgba(255, 255, 255, .1);
    border-radius: var(--radius-md);
    padding: 16px;
    color: var(--white);
    font-family: var(--font-body);
    font-size: 1rem;
    resize: none;
    transition: var(--transition);
    min-height: 80px;
}

.rich-editor:empty:before {
    content: attr(placeholder);
    color: rgba(192, 219, 254, .4);
    pointer-events: none;
    display: block;
}

.input-group textarea:focus,
.rich-editor:focus {
    outline: none;
    border-color: var(--pink);
    box-shadow: 0 0 15px var(--pink-glow);
    background: rgba(20, 28, 64, .8);
}

/* Math Styles */
.math-frac {
    display: inline-flex;
    flex-direction: column;
    vertical-align: middle;
    text-align: center;
    font-size: 0.85em;
    padding: 0 4px;
}

.math-frac-num {
    border-bottom: 1px solid currentColor;
    padding: 0 2px;
}

.math-frac-den {
    padding: 0 2px;
}

sup {
    vertical-align: super;
    font-size: 0.75em;
    line-height: 0;
}

sub {
    vertical-align: sub;
    font-size: 0.75em;
    line-height: 0;
}

/* Math Keyboard */
.math-keyboard {
    background: rgba(0, 0, 0, .2);
    border-radius: var(--radius-md);
    padding: 12px;
    margin-bottom: 30px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.keyboard-row {
    display: flex;
    gap: 8px;
    justify-content: center;
    flex-wrap: wrap;
}

.key {
    background: rgba(255, 255, 255, .05);
    border: 1px solid rgba(255, 255, 255, .1);
    color: var(--globe);
    padding: 8px 12px;
    min-width: 44px;
    border-radius: var(--radius-sm);
    font-family: var(--font-body);
    font-weight: 600;
    transition: var(--transition);
}

.key:hover {
    background: var(--navy-light);
    color: var(--teal);
    border-color: var(--teal);
}

.builder-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    align-items: flex-end;
}

.deck-selector-wrap {
    display: flex;
    flex-direction: column;
    gap: 8px;
    text-align: left;
}

.deck-selector-wrap label {
    font-family: var(--font-heading);
    font-size: .75rem;
    font-weight: 600;
    color: var(--globe);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.deck-selector-wrap select {
    background: var(--navy-light);
    border: 1px solid rgba(255, 255, 255, .1);
    border-radius: 50px;
    padding: 10px 20px;
    color: var(--white);
    font-family: var(--font-body);
    font-weight: 600;
    transition: var(--transition);
    cursor: pointer;
    min-width: 180px;
}

.deck-selector-wrap select:focus {
    outline: none;
    border-color: var(--teal);
}

.btn {
    padding: 14px 32px;
    border-radius: 50px;
    font-weight: 700;
    font-family: var(--font-heading);
    transition: var(--transition);
    border: none;
    font-size: .95rem;
}

.btn--pink {
    background: var(--pink);
    color: var(--white);
    box-shadow: var(--shadow-glow-pink);
}

.btn--pink:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 25px var(--pink-glow);
}

.btn--teal {
    background: var(--teal);
    color: var(--navy);
    box-shadow: var(--shadow-glow-teal);
}

.btn--teal:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 25px var(--teal-glow);
}

.btn:disabled,
.btn--disabled {
    background: #333 !important;
    color: #666 !important;
    box-shadow: none !important;
    cursor: not-allowed !important;
    transform: none !important;
}

/* Library Section */
.shelf-container {
    margin-top: 50px;
}

.shelf-container h3 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    margin-bottom: 20px;
    color: var(--globe);
    display: flex;
    align-items: center;
    gap: 10px;
}

.decks-row {
    display: flex;
    gap: 20px;
    overflow-x: auto;
    padding: 10px 5px 25px;
    scrollbar-width: thin;
    scrollbar-color: var(--pink) transparent;
}

.deck-folder {
    min-width: 220px;
    height: 160px;
    background: linear-gradient(135deg, var(--navy-light), var(--navy));
    border: 2px dashed rgba(92, 225, 230, .3);
    border-radius: var(--radius-md);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    transition: var(--transition);
    cursor: pointer;
    overflow: hidden;
}

.deck-folder:hover {
    border-color: var(--teal);
    transform: translateY(-5px);
}

.deck-study-overlay {
    position: absolute;
    inset: 0;
    background: rgba(92, 225, 230, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: 0.2s ease;
    z-index: 5;
}

.deck-folder:hover .deck-study-overlay {
    opacity: 1;
}

.deck-study-overlay span {
    color: var(--navy);
    font-weight: 800;
    font-size: 1.1rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.deck-folder .folder-icon {
    font-size: 2.5rem;
    color: var(--teal);
    margin-bottom: 10px;
}

.deck-folder .deck-name {
    font-weight: 700;
    color: var(--white);
}

.deck-folder .card-count {
    font-size: .75rem;
    color: var(--globe);
    opacity: .7;
}

.deck-folder.drag-over {
    border-color: var(--teal);
    background: rgba(92, 225, 230, .1);
    transform: scale(1.05);
}

/* Move Here Overlay */
.move-overlay {
    position: absolute;
    inset: 0;
    background: var(--teal);
    border-radius: inherit;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--navy);
    font-weight: 800;
    font-size: 1.1rem;
    opacity: 0;
    pointer-events: none;
    transition: .15s ease;
    z-index: 20;
}

.deck-folder.drag-over .move-overlay {
    opacity: 1;
}

/* Loose Cards Grid */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}

.builder-card-item {
    background: rgba(255, 255, 255, .04);
    border: 1px solid rgba(255, 255, 255, .08);
    border-radius: var(--radius-md);
    padding: 20px;
    position: relative;
    transition: var(--transition);
    cursor: grab;
}

.builder-card-item:hover {
    border-color: var(--pink);
    background: rgba(255, 255, 255, .07);
}

.builder-card-item:active {
    cursor: grabbing;
}

.card-item__content {
    margin-bottom: 40px;
}

.card-item__term {
    font-weight: 700;
    color: var(--pink);
    margin-bottom: 8px;
    font-size: 1.1rem;
}

.card-item__def {
    font-size: .92rem;
    color: var(--globe);
    line-height: 1.5;
}

.card-item__actions {
    position: absolute;
    bottom: 15px;
    right: 15px;
    display: flex;
    gap: 10px;
}

.icon-btn {
    background: rgba(255, 255, 255, .08);
    border: 1px solid rgba(255, 255, 255, .1);
    color: var(--white);
    width: 32px;
    height: 32px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: .9rem;
    transition: var(--transition);
}

.icon-btn:hover {
    background: var(--navy-light);
}

.icon-btn--edit:hover {
    color: var(--teal);
    border-color: var(--teal);
}

.icon-btn--delete:hover {
    color: #ff4d4d;
    border-color: #ff4d4d;
}

@media (max-width: 768px) {
    .builder-inputs {
        grid-template-columns: 1fr;
    }

    .builder-card {
        padding: 25px;
    }
}