/* ============================
   8th Wall — Single Page Layout
   No scroll, full viewport
   ============================ */
html {
    font-size: 20px;
}

:root {
    --purple: #7611B6;
    --purple-light: #9333ea;
    --purple-faint: rgba(118, 17, 182, 0.06);
    --bg: #f5f6f8;
    --bg-white: #ffffff;
    --border: #e2e5ea;
    --border-hover: #c9cdd4;
    --text: #1a1d26;
    --text-dim: #5a6170;
    --text-muted: #9ca3af;
    --success: #16a34a;
    --error: #dc2626;
    --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --mono: 'JetBrains Mono', 'Fira Code', monospace;
    --radius: 8px;
}

*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html,
body {
    height: 100%;
    overflow: hidden;
}

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    display: flex;
    flex-direction: column;
    -webkit-font-smoothing: antialiased;
}

/* ==== Header ==== */
.header {
    height: 58px;
    padding: 0 28px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--bg-white);
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}

.header-brand {
    display: flex;
    align-items: center;
    gap: 10px;
}

.header-title {
    font-size: 1rem;
    font-weight: 600;
}

.header-link {
    font-size: 0.9rem;
    color: var(--text-dim);
    text-decoration: none;
    font-weight: 500;
}

.header-link:hover {
    color: var(--purple);
}

/* ==== Main ==== */
.main {
    flex: 1;
    display: flex;
    gap: 0;
    min-height: 0;
    overflow: hidden;
}

/* ==== Left Panel: Image ==== */
.panel-image {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    min-width: 0;
    position: relative;
    background: var(--bg);
}

/* Upload zone */
.upload-zone {
    width: 100%;
    max-width: 500px;
    aspect-ratio: 4/3;
    border: 2px dashed var(--border);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s;
    background: var(--bg-white);
}

.upload-zone:hover,
.upload-zone.drag-over {
    border-color: var(--purple);
    background: var(--purple-faint);
}

.upload-zone.hidden {
    display: none;
}

.upload-content {
    text-align: center;
}

.upload-icon {
    font-size: 48px;
    display: block;
    margin-bottom: 12px;
    opacity: 0.6;
}

.upload-text {
    font-size: 1.05rem;
    color: var(--text-dim);
}

.upload-text strong {
    color: var(--purple);
}

.upload-hint {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 6px;
}

#imageFileInput {
    display: none;
}

/* Preview area */
.preview-area {
    display: none;
    width: 100%;
    height: 100%;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.preview-area.visible {
    display: flex;
}

.preview-wrapper {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    max-width: 100%;
    max-height: calc(100% - 32px);
    border-radius: var(--radius);
    overflow: hidden;
}

#imagePreview {
    max-width: 100%;
    max-height: calc(100vh - 120px);
    display: block;
    border-radius: var(--radius);
    object-fit: contain;
}

.image-meta {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    justify-content: center;
}

.image-meta-tag {
    font-size: 0.68rem;
    padding: 2px 8px;
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: 100px;
    color: var(--text-dim);
    font-family: var(--mono);
}

/* Crop overlay */
.crop-overlay {
    position: absolute;
    border: 2px solid var(--purple);
    background: rgba(118, 17, 182, 0.08);
    pointer-events: auto;
    box-shadow: 0 0 0 9999px rgba(0, 0, 0, 0.35);
    cursor: move;
    z-index: 5;
}

.crop-overlay.hidden {
    display: none !important;
}

.crop-handle {
    position: absolute;
    width: 10px;
    height: 10px;
    background: var(--purple);
    border: 2px solid white;
    border-radius: 2px;
    z-index: 6;
}

.crop-handle-tl {
    top: -5px;
    left: -5px;
    cursor: nw-resize;
}

.crop-handle-tr {
    top: -5px;
    right: -5px;
    cursor: ne-resize;
}

.crop-handle-bl {
    bottom: -5px;
    left: -5px;
    cursor: sw-resize;
}

.crop-handle-br {
    bottom: -5px;
    right: -5px;
    cursor: se-resize;
}

.crop-size-badge {
    position: absolute;
    bottom: -24px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--purple);
    color: white;
    font-size: 0.62rem;
    font-family: var(--mono);
    padding: 2px 6px;
    border-radius: 3px;
    white-space: nowrap;
    pointer-events: none;
}

.preview-wrapper.draw-mode {
    cursor: crosshair;
}

.preview-wrapper.draw-mode .crop-overlay,
.preview-wrapper.drawing .crop-overlay {
    pointer-events: none;
}

/* ==== Right Panel: Settings ==== */
.panel-settings {
    width: 380px;
    flex-shrink: 0;
    background: var(--bg-white);
    border-left: 1px solid var(--border);
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 14px;
    overflow-y: auto;
}

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

.setting-label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

/* Type selector */
.type-selector {
    display: flex;
    gap: 4px;
}

.type-option {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 11px 6px;
    border: 1.5px solid var(--border);
    border-radius: var(--radius);
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-dim);
    transition: all 0.15s;
    text-align: center;
}

.type-option input {
    display: none;
}

.type-option:has(input:checked) {
    border-color: var(--purple);
    background: var(--purple-faint);
    color: var(--purple);
}

.type-option:has(input:disabled) {
    opacity: 0.4;
    cursor: not-allowed;
}

.type-option:hover {
    border-color: var(--border-hover);
}

.type-selector.compact .type-option {
    padding: 6px;
}

/* Cylinder fields */
.cylinder-fields {
    display: none;
}

.cylinder-fields.visible {
    display: flex;
    flex-direction: column;
    gap: 8px;
    animation: slideDown 0.2s ease;
}

/* Fields */
.field-row {
    display: flex;
    gap: 8px;
}

.field {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 3px;
}

.input {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-family: var(--font);
    font-size: 0.95rem;
    color: var(--text);
    background: var(--bg);
    outline: none;
    transition: border 0.15s;
}

.input:focus {
    border-color: var(--purple);
    box-shadow: 0 0 0 2px rgba(118, 17, 182, 0.08);
    background: var(--bg-white);
}

.input::placeholder {
    color: var(--text-muted);
}

.input[readonly] {
    color: var(--text-muted);
}

/* Toggle */
.toggle-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.toggle-row.compact {
    margin-bottom: 4px;
}

.toggle {
    position: relative;
    width: 36px;
    height: 20px;
}

.toggle input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-track {
    position: absolute;
    inset: 0;
    background: var(--border);
    border-radius: 100px;
    cursor: pointer;
    transition: background 0.2s;
}

.toggle-track::before {
    content: '';
    position: absolute;
    width: 14px;
    height: 14px;
    left: 3px;
    top: 3px;
    background: white;
    border-radius: 50%;
    transition: transform 0.2s;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.toggle input:checked+.toggle-track {
    background: var(--purple);
}

.toggle input:checked+.toggle-track::before {
    transform: translateX(16px);
}

/* Manual crop */
.manual-crop {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.manual-crop.hidden {
    display: none;
}

/* Divider */
.divider {
    border: none;
    border-top: 1px solid var(--border);
    margin: 0;
}

/* Generate button */
.btn-generate {
    width: 100%;
    padding: 13px;
    background: var(--purple);
    color: white;
    font-family: var(--font);
    font-size: 0.98rem;
    font-weight: 600;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.15s;
    margin-top: auto;
}

.btn-generate:hover:not(:disabled) {
    background: var(--purple-light);
}

.btn-generate:disabled {
    opacity: 0.35;
    cursor: not-allowed;
}

/* ==== Output Modal ==== */
.modal-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 100;
    align-items: center;
    justify-content: center;
    padding: 24px;
}

.modal-backdrop.visible {
    display: flex;
}

.modal {
    background: var(--bg-white);
    border-radius: 12px;
    padding: 24px;
    max-width: 760px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.15);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}

.modal-header h2 {
    font-size: 1rem;
    font-weight: 600;
}

.modal-close {
    width: 28px;
    height: 28px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--bg);
    cursor: pointer;
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s;
}

.modal-close:hover {
    background: var(--border);
}

.output-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
}

.output-item {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
}

.output-item img {
    width: 100%;
    height: 100px;
    object-fit: contain;
    padding: 6px;
}

.output-item-label {
    padding: 6px 8px;
    font-size: 0.7rem;
    color: var(--text-dim);
    font-weight: 500;
    border-top: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 6px;
}

.output-item-label .badge {
    font-size: 0.58rem;
    padding: 1px 5px;
    background: var(--purple-faint);
    color: var(--purple);
    border-radius: 100px;
    font-weight: 600;
}

.json-toggle {
    margin-top: 12px;
}

.btn-text {
    background: none;
    border: none;
    color: var(--text-dim);
    font-family: var(--font);
    font-size: 0.78rem;
    font-weight: 500;
    cursor: pointer;
}

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

.json-preview {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 10px;
    margin-top: 8px;
    max-height: 180px;
    overflow-y: auto;
}

.json-preview.hidden {
    display: none;
}

.json-preview pre {
    font-family: var(--mono);
    font-size: 0.7rem;
    color: var(--text-dim);
    line-height: 1.5;
    white-space: pre-wrap;
    word-break: break-all;
}

.btn-download {
    display: block;
    width: 100%;
    margin-top: 12px;
    padding: 10px;
    background: rgba(22, 163, 74, 0.08);
    border: 1px solid rgba(22, 163, 74, 0.2);
    color: var(--success);
    font-family: var(--font);
    font-size: 0.85rem;
    font-weight: 600;
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.15s;
}

.btn-download:hover {
    background: rgba(22, 163, 74, 0.15);
}

/* ==== Processing ==== */
.processing {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(4px);
    z-index: 200;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 12px;
}

.processing.visible {
    display: flex;
}

.spinner {
    width: 32px;
    height: 32px;
    border: 3px solid var(--border);
    border-top-color: var(--purple);
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
}

.processing span {
    font-size: 0.85rem;
    color: var(--text-dim);
    font-weight: 500;
}

/* ==== Toast ==== */
.toast {
    position: fixed;
    bottom: 16px;
    right: 16px;
    padding: 10px 16px;
    border-radius: var(--radius);
    font-size: 0.82rem;
    font-weight: 500;
    z-index: 300;
    transform: translateY(60px);
    opacity: 0;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
}

.toast.visible {
    transform: translateY(0);
    opacity: 1;
}

.toast.success {
    background: var(--bg-white);
    border: 1px solid rgba(22, 163, 74, 0.25);
    color: var(--success);
}

.toast.error {
    background: var(--bg-white);
    border: 1px solid rgba(220, 38, 38, 0.25);
    color: var(--error);
}

.toast.info {
    background: var(--bg-white);
    border: 1px solid rgba(118, 17, 182, 0.2);
    color: var(--purple);
}

/* ==== Animations ==== */
@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-6px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==== Mobile ==== */
@media (max-width: 700px) {
    .main {
        flex-direction: column;
    }

    .panel-image {
        height: 50%;
        padding: 8px;
    }

    .panel-settings {
        width: 100%;
        height: 50%;
        border-left: none;
        border-top: 1px solid var(--border);
        padding: 12px;
        gap: 8px;
    }

    #imagePreview {
        max-height: calc(50vh - 80px);
    }

    .upload-zone {
        max-width: none;
        aspect-ratio: auto;
        height: 100%;
    }

    .output-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .modal {
        padding: 16px;
        margin: 8px;
    }
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 4px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 2px;
}