/* ==========================================================================
   Main Workspace & Topbar Morph Layout
   ========================================================================== */
#main-workspace {
    display: flex;
    flex-direction: column;
    grid-column: 2;
    grid-row: 2;
    height: 100%;
    width: 100%;
    min-width: 0;
    position: relative;
    transition: opacity 0.15s ease-in-out;
}

#main-workspace.fade-out {
    opacity: 0;
}

#app-root.landing #main-workspace,
#app-root.showing-examples #main-workspace {
    /* #main-workspace's base rule (above) always places it at grid-column:2
       grid-row:2 for the normal (sidebar + content) 2-column/2-row grid.
       Landing/showing-examples mode collapses #app-root down to a single
       real column (and, on mobile, a single real row) - so that "2" no
       longer points at an actual track. Without pinning it back to 1/-1
       here, the grid has to invent a phantom extra column+row just to
       satisfy the stale placement, and everything that's supposed to span
       and center across the *real* track (like #topbar's `1 / -1`) ends up
       measured against that phantom track too, visibly skewing the
       centered landing content off to one side.
    */
    grid-column: 1 / -1;
    grid-row: 1 / -1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background: var(--bg-primary);
    height: 100%;
    width: 100%;
}

#topbar {
    grid-column: 1 / -1;
    grid-row: 1;
    background-color: var(--bg-tertiary);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
    padding: 8px 12px 8px 24px;
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: flex-start;
    min-width: 0;
    z-index: 20;
}

/* Topbar in landing mode */
#app-root.landing #topbar,
#app-root.showing-examples #topbar {
    grid-column: 1 / -1;
    grid-row: 1 / -1;
    justify-self: center;
    align-self: center;
    background: transparent;
    backdrop-filter: none;
    border-bottom: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: min(640px, 90vw);
    margin: 0;
    margin-bottom: 52px; /* Centers topbar in the space above the 52px tall footer */
    padding: 0;
    gap: 0;
}

@media (max-width: 768px) {
    #app-root.landing #topbar,
    #app-root.showing-examples #topbar {
        /* On mobile, the footer is now just two lines (credit, and links). Height is ~64px. 
           Adding 64px margin-bottom centers the main content perfectly in the space above it. */
        margin-bottom: 64px;
    }
}


/* Landing Page Top-Left Install App Button */
#landing-install-app-btn {
    display: none;
}

#app-root.landing #landing-install-app-btn {
    position: absolute;
    top: 20px;
    left: 20px;
    z-index: 100;
    display: inline-flex;
    align-items: center;
    gap: 7px;
}

#landing-install-app-btn svg {
    color: currentColor;
}

@media all and (display-mode: standalone) {
    #landing-install-app-btn,
    #app-root.landing #landing-install-app-btn {
        display: none !important;
    }
}

/* Hero logo - visible in center on landing, top-left on active */
#hero-logo-wrap {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 10px;
    margin-bottom: 0;
    cursor: pointer;
    position: relative;
    z-index: 50;
    pointer-events: auto;
    -webkit-tap-highlight-color: transparent;
}

#app-root.landing #hero-logo-wrap {
    flex-direction: column;
    margin-bottom: 32px;
    gap: 16px;
}

#hero-logo {
    width: 64px;
    height: 64px;
    filter: none;
}

#app-root.landing #hero-logo {
    width: 220px;
    height: 220px;
    filter: none;
}

/* Search Area Wrap */
.topbar-search-area {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
    flex-grow: 1;
    margin-left: 24px;
    margin-right: 12px;
    width: auto;
    min-width: 0;
}

#app-root.landing .topbar-search-area {
    width: 100%;
    max-width: 100%;
    margin-left: 0;
    flex-direction: column;
    gap: 0;
    flex-grow: 0;
}

.input-row {
    display: flex;
    gap: 12px;
    align-items: center;
    width: 100%;
}

/* Topbar Actions (Right aligned) */
.topbar-actions {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-left: auto;
    height: 40px; /* Match input box height */
}

#app-root.landing .topbar-actions {
    position: absolute;
    top: 24px;
    right: 32px;
}

#app-root.landing #sop-pos-pill,
#app-root.showing-examples #sop-pos-pill {
    display: none;
}

/* Pill Toggle Styles */
.pill-toggle {
    position: relative;
    display: flex;
    align-items: center;
    background-color: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 3px;
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.1);
    cursor: pointer;
    overflow: hidden;
    user-select: none; /* Prevent highlighting on hold */
    height: 100%;
}

.pill-slider {
    position: absolute;
    top: 3px;
    left: 3px;
    height: calc(100% - 6px);
    width: calc(50% - 3px);
    background-color: var(--accent);
    border-radius: 16px;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1;
}

.pill-toggle[data-state="pos"] .pill-slider,
.pill-toggle[data-state="light"] .pill-slider,
.pill-toggle[data-state="wrap"] .pill-slider,
.pill-toggle[data-state="3d"] .pill-slider,
.pill-toggle[data-state="no-tb"] .pill-slider,
.pill-toggle[data-state="qm"] .pill-slider {
    transform: translateX(100%);
}

.pill-option {
    position: relative;
    z-index: 2;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 11.5px;
    font-weight: 600;
    font-family: 'Inter', sans-serif;
    padding: 6px 16px;
    border-radius: 16px;
    cursor: pointer;
    transition: color 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
}

.theme-toggle .pill-option {
    padding: 6px 12px;
}

.verilog-tb-toggle .pill-option {
    min-width: 100px;
}

.pill-option.active {
    color: #fff;
}

#app-root.landing #result-row,
#app-root.landing #error-feedback,
#app-root.showing-examples #result-row,
#app-root.showing-examples #error-feedback {
    display: none !important;
}

/* Input Wrapper & Text Bar */
.input-wrapper {
    position: relative;
    flex-grow: 1;
    width: 100%;
}

.search-icon {
    position: absolute;
    left: 18px;
    top: 50%;
    transform: translateY(-50%);
    width: 18px;
    height: 18px;
    color: var(--text-muted);
    pointer-events: none;
    transition: color 0.3s ease;
}

/* Solutions Drag Carousel */
.draggable-carousel {
    display: flex;
    gap: 12px;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    cursor: grab;
    align-items: center;
    scrollbar-width: none;
    -ms-overflow-style: none;
    max-width: calc(100vw - 300px); /* Leave room for sidebar */
    padding-bottom: 4px; /* Optional, for grab area */
    min-width: 0;
}
.draggable-carousel::-webkit-scrollbar {
    display: none;
}
.draggable-carousel:active {
    cursor: grabbing;
}

.solution-card {
    display: flex;
    align-items: center;
    gap: 10px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border);
    padding: 6px 14px;
    border-radius: 12px;
    scroll-snap-align: start;
    flex-shrink: 0;
    transition: background-color 0.2s ease;
}

.solution-card:hover {
    background-color: var(--bg-tertiary);
}

.solution-card.selected-solution {
    border-color: var(--success);
    background-color: var(--bg-tertiary);
    box-shadow: none;
}

.solution-card .expr-text {
    font-family: 'STIX Two Text', 'Outfit', serif;
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
}

.solution-card.selected-solution .expr-text {
    color: var(--success) !important;
}

.solution-card-actions {
    display: flex;
    align-items: center;
    gap: 0;
}

.solution-card .action-icon-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 2px 4px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.solution-card .action-icon-btn:hover {
    background: transparent !important;
    color: var(--text-muted) !important;
}

.exceeded-msg {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
    width: 100%;
    color: var(--text-muted);
    font-size: 15px;
    font-weight: 500;
    text-align: center;
    padding: 24px;
    box-sizing: border-box;
}

.nav-btn.disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

#expression-input {
    width: 100%;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border);
    color: var(--text-primary);
    font-family: 'STIX Two Text', 'Outfit', serif;
    font-size: 16px;
    font-weight: 500;
    letter-spacing: 0.2px;
    padding: 11px 76px 11px 24px;
    border-radius: 24px;
    outline: none;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

#expression-input:focus {
    border-color: var(--accent);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    background-color: var(--bg-secondary);
}

#app-root.landing #expression-input {
    border-radius: 28px;
    padding: 16px 86px 16px 28px;
    font-size: 18px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

#app-root.landing #expression-input:hover {
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
    border-color: rgba(255, 255, 255, 0.12);
}

#app-root.landing #expression-input:focus {
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
}

/* Clear Input button inside Search Bar */
#clear-input-btn {
    position: absolute;
    right: 18px;
    top: 50%;
    transform: translateY(-50%);
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 20px;
    font-weight: 300;
    cursor: pointer;
    width: 24px;
    height: 24px;
    display: none;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: var(--transition-fast);
    line-height: 1;
}

#clear-input-btn:hover {
    color: var(--text-primary);
    background-color: rgba(255, 255, 255, 0.08);
}

#app-root.landing #clear-input-btn {
    right: 22px;
}

/* Expression Status button (error / share) - sits just left of the clear (x) button */
#expr-status-btn {
    position: absolute;
    right: 50px;
    top: 50%;
    transform: translateY(-50%);
    background: transparent;
    border: none;
    cursor: pointer;
    width: 26px;
    height: 26px;
    display: none;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: var(--transition-fast);
    padding: 0;
}

#expr-status-btn svg {
    display: none;
    flex-shrink: 0;
}

#app-root.landing #expr-status-btn {
    right: 58px;
}

#expr-status-btn.state-error {
    color: var(--error);
}

#expr-status-btn.state-error:hover {
    color: var(--error);
    background-color: rgba(255, 255, 255, 0.08); /* Matches clear-btn */
}

#expr-status-btn.state-error #expr-status-icon-error {
    display: block;
}

#expr-status-btn.state-share {
    color: var(--text-muted);
}

#expr-status-btn.state-share:hover {
    color: var(--accent);
    background-color: rgba(255, 255, 255, 0.08);
}

#expr-status-btn.state-share #expr-status-icon-share {
    display: block;
}

/* Share Popup */
.modal.sm.share-modal {
    height: auto;
    min-height: unset;
    max-height: 90vh;
}

.share-note {
    font-size: 13.5px;
    line-height: 1.5;
    color: var(--text-secondary);
}

.share-link-row {
    display: flex;
    align-items: center;
    gap: 8px;
}

#share-link-input {
    flex-grow: 1;
    min-width: 0;
    background-color: var(--bg-tertiary, var(--bg-primary));
    border: 1px solid var(--border);
    color: var(--text-primary);
    font-family: 'Fira Code', 'JetBrains Mono', monospace;
    font-size: 13px;
    padding: 10px 12px;
    border-radius: 10px;
    outline: none;
}

#share-copy-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    background-color: var(--accent);
    color: #fff;
    border: none;
    padding: 10px 14px;
    border-radius: 10px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    flex-shrink: 0;
    transition: var(--transition-fast);
}

#share-copy-btn:hover {
    background-color: var(--accent-hover);
}

#share-copy-btn.copied {
    background-color: var(--success);
}

/* Bottom links on landing */
.topbar-bottom-links {
    display: none;
    gap: 12px;
    margin-top: 20px;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
}

#app-root.landing .topbar-bottom-links {
    display: flex;
}

.quick-presets-group,
.landing-links-group {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    flex-wrap: wrap;
}

.quick-presets-label {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-muted);
    letter-spacing: 0.3px;
    margin-right: 2px;
}

.quick-presets-divider {
    width: 1px;
    height: 14px;
    background-color: var(--border);
    margin: 0 4px;
    display: inline-block;
}

@media (max-width: 640px) {
    .topbar-bottom-links {
        flex-direction: column;
        gap: 10px;
    }

    .quick-presets-divider {
        display: none !important;
    }
}

.landing-link-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 13.5px;
    font-weight: 500;
    letter-spacing: 0.5px;
    padding: 6px 16px;
    cursor: pointer;
    transition: var(--transition-fast);
    border-radius: 18px;
    border: 1px solid var(--border);
    background-color: rgba(255, 255, 255, 0.02);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
}

.landing-link-btn:hover {
    color: var(--accent);
    background-color: var(--accent-light);
    border-color: rgba(37, 99, 235, 0.2);
}

/* Format Guide Modal Styles */
.format-modal {
    max-width: 650px;
    height: 80%;
    max-height: 700px;
}

.format-guide-body {
    padding: 24px;
    gap: 28px;
}

.guide-section {
    display: flex;
    flex-direction: column;
}

.guide-section h3 {
    font-size: 16px;
    color: var(--text-primary);
    margin-bottom: 6px;
    font-weight: 600;
}

.guide-section p {
    font-size: 13.5px;
    color: var(--text-secondary);
    margin-bottom: 14px;
    line-height: 1.5;
}

.table-responsive {
    width: 100%;
    overflow-x: auto;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--bg-tertiary);
}

.guide-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 13.5px;
}

.guide-table th {
    background-color: rgba(255,255,255,0.03);
    padding: 10px 14px;
    font-weight: 600;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
    vertical-align: top;
}

.guide-table td {
    padding: 10px 14px;
    border-bottom: 1px solid var(--border);
    color: var(--text-primary);
    line-height: 1.6;
    vertical-align: top;
}

.guide-table tr:last-child td {
    border-bottom: none;
}

.guide-table code {
    background-color: var(--bg-primary);
    padding: 3px 6px;
    border-radius: 4px;
    border: 1px solid var(--border);
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
    color: var(--accent);
    white-space: pre-wrap;
    word-break: break-word;
    display: inline-block;
    margin: 2px 0;
}

/* SOP/POS toggle button style */
.toggle-btn {
    padding: 0 16px;
    height: 42px;
    border-radius: 21px;
    font-weight: 600;
    cursor: pointer;
    border: 1px solid transparent;
    transition: var(--transition-fast);
    text-transform: uppercase;
    font-size: 13px;
    letter-spacing: 0.5px;
    flex-shrink: 0;
}

.toggle-btn.sop {
    background-color: var(--sop-color);
    color: white;
}

.toggle-btn.sop:hover {
    background-color: #1d4ed8;
}

.toggle-btn.pos {
    background-color: var(--pos-color);
    color: white;
}

.toggle-btn.pos:hover {
    background-color: #6d28d9;
}

/* Result Row Display */
#result-row {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 0;
    background-color: transparent;
    border: none;
    box-shadow: none;
    min-width: 0;
}

#simplified-label {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-muted);
    padding: 0 4px;
    user-select: none;
}

#simplified-display {
    font-family: 'Fira Code', 'JetBrains Mono', monospace;
    font-size: 18px;
    color: var(--success);
    font-weight: 500;
    word-break: break-all;
}

.action-icon-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 6px;
    border-radius: 6px;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.action-icon-btn:hover {
    background-color: rgba(255, 255, 255, 0.08);
    color: var(--text-primary);
}

.link-btn {
    background: none;
    border: none;
    color: var(--accent);
    cursor: pointer;
    font-size: 13px;
    font-weight: 600;
    text-decoration: underline;
    transition: var(--transition-fast);
    padding: 4px 8px;
}

.link-btn:hover {
    color: #60a5fa;
}

.error-text {
    color: var(--error);
    font-size: 14px;
    font-weight: 500;
}