/* ============================================================
   Design tokens
   ============================================================ */

:root {
    --etude-accent: #EAF205;
    --etude-accent-dark: #d4dc00;
    --etude-accent-border: #b8c200;
    --etude-accent-glow: rgba(234, 242, 5, 0.35);
    --etude-sidebar-width: 300px;
    --etude-field-size: 12px;
    --etude-border: #d0d0d0;
    --etude-border-light: #e4e4e4;
    --etude-bg: #fff;
    --etude-bg-muted: #fafafa;
    --etude-bg-layout: #ededed;
    --etude-bg-toolbar: #f5f5f5;
    --etude-text: #333;
    --etude-text-muted: #888;
    --etude-text-unit: #aaa;
    --etude-text-label: #444;
    --etude-radius: 4px;
    --etude-input-width: 155px;
    --etude-transition: 0.15s;
}

/* ============================================================
   Layout — split pane
   ============================================================ */

.etude-layout {
    display: flex;
    height: calc(100vh - var(--header-height, 60px));
    overflow: hidden;
    background: var(--etude-bg-layout);
}

.etude-form-panel {
    width: var(--etude-sidebar-width);
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    border-right: 1px solid #d4d4d4;
    background: var(--etude-bg);
}

#etude-form {
    flex: 1 1 0;
    overflow-y: auto;
    padding: 16px 14px 8px;
    scrollbar-width: thin;
    scrollbar-color: #ddd transparent;
}

#etude-form::-webkit-scrollbar { width: 5px; }
#etude-form::-webkit-scrollbar-track { background: transparent; }
#etude-form::-webkit-scrollbar-thumb {
    background: #ddd;
    border-radius: 3px;
}

.etude-preview-panel {
    flex: 1;
    display: flex;
    flex-direction: column;
    position: relative;
    background: var(--etude-bg-layout);
}

/* ============================================================
   Toolbar
   ============================================================ */

.etude-toolbar {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 8px;
    padding: 0 10px;
    height: 36px;
    background: var(--etude-bg-toolbar);
    border-bottom: 1px solid #ddd;
}

#etude-preview-btn,
#etude-download-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 4px 12px;
    font-size: var(--etude-field-size);
    font-family: inherit;
    font-weight: 600;
    border: none;
    border-radius: var(--etude-radius);
    background: var(--etude-accent);
    color: #000;
    cursor: pointer;
    transition: background var(--etude-transition), opacity var(--etude-transition);
}

#etude-preview-btn:hover,
#etude-download-btn:not(:disabled):hover { background: var(--etude-accent-dark); }
#etude-download-btn:disabled {
    opacity: 0.35;
    cursor: not-allowed;
}

#etude-embed {
    flex: 1;
    width: 100%;
    border: none;
}

/* ============================================================
   Loading indicator
   ============================================================ */

#etude-loading {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.7);
    font-size: 13px;
    color: var(--etude-text-muted);
    pointer-events: none;
    gap: 8px;
}

#etude-loading[hidden] { display: none; }

#etude-loading::before {
    content: '';
    width: 14px;
    height: 14px;
    border: 2px solid #ddd;
    border-top-color: #000;
    border-radius: 50%;
    animation: etude-spin 0.7s linear infinite;
    flex-shrink: 0;
}

@keyframes etude-spin {
    to { transform: rotate(360deg); }
}

/* ============================================================
   Sections
   ============================================================ */

.etude-section {
    margin-bottom: 20px;
}

.etude-section-title {
    font-size: 10px;
    font-weight: 700;
    color: var(--etude-text);
    text-transform: uppercase;
    letter-spacing: 0.8px;
    margin: 0 0 10px;
    padding-bottom: 5px;
    border-bottom: 2px solid var(--etude-accent);
}

.etude-section--collapsible > summary.etude-section-title {
    list-style: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    user-select: none;
    margin-bottom: 0;
}

.etude-section--collapsible > summary.etude-section-title::-webkit-details-marker {
    display: none;
}

.etude-section--collapsible > summary.etude-section-title::before {
    content: '▶';
    font-size: 8px;
    color: var(--etude-text-muted);
    flex-shrink: 0;
    transition: transform var(--etude-transition);
}

.etude-section--collapsible[open] > summary.etude-section-title::before {
    transform: rotate(90deg);
    color: var(--etude-text);
}

.etude-section-body {
    margin-top: 10px;
}

/* ============================================================
   Fields
   ============================================================ */

.etude-field {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    margin-bottom: 6px;
    min-height: 26px;
}

.etude-label-wrap {
    flex: 1;
    min-width: 0;
    display: flex;
    align-items: center;
    gap: 4px;
}

.etude-field label {
    min-width: 0;
    font-size: var(--etude-field-size);
    color: var(--etude-text-label);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    line-height: 1.3;
}

.etude-input-wrap {
    display: flex;
    align-items: center;
    gap: 5px;
    flex-shrink: 0;
    width: var(--etude-input-width);
}

.etude-input-wrap input,
.etude-input-wrap select {
    flex: 1;
    min-width: 0;
    font-size: var(--etude-field-size);
    font-family: inherit;
    padding: 4px 7px;
    border: 1px solid var(--etude-border);
    border-radius: var(--etude-radius);
    background: var(--etude-bg-muted);
    color: #222;
    transition: border-color var(--etude-transition), background var(--etude-transition);
}

.etude-input-wrap input[type="number"] {
    text-align: right;
}

.etude-input-wrap input:hover,
.etude-input-wrap select:hover {
    border-color: #b0b0b0;
    background: var(--etude-bg);
}

.etude-input-wrap input:focus,
.etude-input-wrap select:focus {
    outline: none;
    border-color: var(--etude-accent-border);
    background: var(--etude-bg);
    box-shadow: 0 0 0 2px var(--etude-accent-glow);
}

.etude-unit {
    font-size: 11px;
    color: var(--etude-text-unit);
    white-space: nowrap;
    min-width: 34px;
}

/* ============================================================
   Catalogue — collapsible appoints
   ============================================================ */

.etude-appoint {
    margin-bottom: 5px;
    border: 1px solid var(--etude-border-light);
    border-radius: 5px;
    background: #fdfdfd;
    overflow: hidden;
    transition: border-color var(--etude-transition);
}

.etude-appoint:hover { border-color: #c8c8c8; }
.etude-appoint[open] { border-color: var(--etude-border); }

.etude-appoint > summary {
    display: flex;
    align-items: center;
    padding: 7px 9px;
    font-size: var(--etude-field-size);
    font-weight: 600;
    color: var(--etude-text);
    cursor: pointer;
    user-select: none;
    list-style: none;
    gap: 6px;
    background: var(--etude-bg-toolbar);
    transition: background var(--etude-transition);
}

.etude-appoint > summary:hover { background: var(--etude-accent); }
.etude-appoint[open] > summary {
    background: #f0f0f0;
    border-bottom: 1px solid var(--etude-border-light);
}

.etude-appoint > summary::-webkit-details-marker { display: none; }

.etude-appoint > summary::before {
    content: '▶';
    font-size: 8px;
    color: #bbb;
    flex-shrink: 0;
    transition: transform var(--etude-transition);
}

.etude-appoint[open] > summary::before {
    transform: rotate(90deg);
    color: #555;
}

.etude-appoint > summary > span {
    flex: 1;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.etude-appoint-fields {
    padding: 10px 9px 8px;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

/* ============================================================
   Remove button
   ============================================================ */

.etude-remove-btn {
    flex-shrink: 0;
    background: none;
    border: none;
    color: #ccc;
    cursor: pointer;
    padding: 2px 5px;
    font-size: 11px;
    border-radius: 3px;
    line-height: 1;
    transition: color var(--etude-transition), background var(--etude-transition);
}

.etude-remove-btn:hover {
    color: #000;
    background: var(--etude-accent);
}

/* ============================================================
   Add appoint button
   ============================================================ */

.etude-add-btn {
    width: 100%;
    margin-top: 8px;
    padding: 7px 10px;
    background: transparent;
    border: 1.5px dashed #ccc;
    border-radius: 5px;
    font-size: var(--etude-field-size);
    font-family: inherit;
    color: var(--etude-text-muted);
    cursor: pointer;
    text-align: center;
    transition: border-color var(--etude-transition), color var(--etude-transition), background var(--etude-transition);
}

.etude-add-btn:hover {
    background: var(--etude-accent);
    border-color: var(--etude-accent-border);
    color: #000;
}

/* ============================================================
   Info icon & tooltip
   ============================================================ */

.etude-info {
    flex-shrink: 0;
    font-size: 10px;
    color: var(--etude-accent-border);
    cursor: help;
    line-height: 1;
}

.etude-tooltip {
    position: fixed;
    z-index: 9999;
    width: 200px;
    background: var(--etude-text);
    color: #fff;
    font-size: 10px;
    line-height: 1.4;
    padding: 5px 8px;
    border-radius: var(--etude-radius);
    white-space: normal;
    text-align: left;
    pointer-events: auto;
}

.etude-tooltip[hidden] { display: none; }