/* ----------------------
   CSS Variables & Tokens 
   ---------------------- */
:root {
    --bg-main: #f3f4f6;
    --bg-card: #ffffff;
    --bg-header: rgba(255, 255, 255, 0.85);

    --text-primary: #1f2937;
    --text-secondary: #4b5563;
    --text-accent: #2563eb;

    --border-color: #e5e7eb;
    --accent-color: #2563eb;
    --accent-hover: #1d4ed8;

    --success: #10b981;
    --success-bg: #d1fae5;

    --warning: #f59e0b;
    --warning-bg: #fef3c7;

    --critical: #ef4444;
    --critical-bg: #fee2e2;

    --info: #3b82f6;
    --info-bg: #dbeafe;

    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;

    --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.1);

    --blur: blur(12px);
    --font-main: 'Inter', sans-serif;
}

[data-theme="dark"] {
    --bg-main: #0f172a;
    --bg-card: #1e293b;
    --bg-header: rgba(30, 41, 59, 0.85);

    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-accent: #60a5fa;

    --border-color: #334155;
    --accent-color: #3b82f6;
    --accent-hover: #60a5fa;

    --success-bg: rgba(16, 185, 129, 0.15);
    --warning-bg: rgba(245, 158, 11, 0.15);
    --critical-bg: rgba(239, 68, 68, 0.15);
    --info-bg: rgba(59, 130, 246, 0.15);

    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
}

/* ----------------------
   Resets & Base 
   ---------------------- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: var(--font-main);
}

body {
    background-color: var(--bg-main);
    color: var(--text-primary);
    transition: background-color 0.3s ease, color 0.3s ease;
    min-height: 100vh;
    overflow-x: hidden;
}

.material-icons-round {
    vertical-align: middle;
}

/* ----------------------
   Layout & Header 
   ---------------------- */
.app-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    background: var(--bg-header);
    backdrop-filter: var(--blur);
    -webkit-backdrop-filter: var(--blur);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.logo-area {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-icon {
    font-size: 2rem;
    color: var(--accent-color);
}

.logo-area h1 {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.app-nav {
    display: flex;
    gap: 0.5rem;
}

.nav-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.2s ease;
}

.nav-btn:hover {
    background: var(--border-color);
    color: var(--text-primary);
}

.nav-btn.active {
    background: var(--accent-color);
    color: white;
}

.main-content {
    flex: 1;
    padding: 2rem;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

/* When viewer is active: lock the entire height chain */
.app-container.viewer-active {
    height: 100dvh;
    max-height: 100dvh;
    overflow: hidden;
}

.app-container.viewer-active .main-content {
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.app-container.viewer-fullscreen .app-header {
    display: none;
}

/* ----------------------
   UI Components Base 
   ---------------------- */
.glass-panel {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.glass-panel:hover {
    box-shadow: var(--shadow-md);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-primary {
    background-color: var(--accent-color);
    color: white;
}

.btn-primary:hover {
    background-color: var(--accent-hover);
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover:not(:disabled) {
    background-color: var(--border-color);
}

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

.btn-success:hover {
    filter: brightness(1.1);
    transform: translateY(-2px);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.icon-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    width: 32px;
    height: 32px;
    padding: 0;
    border-radius: 50%;
    transition: background 0.2s, color 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.icon-btn:hover {
    background: var(--border-color);
    color: var(--text-primary);
}

/* ----------------------
   Dashboard View
   ---------------------- */
.dashboard-header {
    margin-bottom: 2rem;
}

.dashboard-header h2 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.dashboard-header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.5rem;
}

.instruction-card {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
}

.card-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

.badge {
    padding: 0.25rem 0.75rem;
    border-radius: 99px;
    font-weight: 600;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.difficulty-leicht { background: var(--success-bg); color: var(--success); }
.difficulty-mittel { background: var(--warning-bg); color: var(--warning); }
.difficulty-schwer { background: var(--critical-bg); color: var(--critical); }

.duration {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    color: var(--text-secondary);
}

.instruction-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
}

.instruction-card p {
    color: var(--text-secondary);
    line-height: 1.5;
    margin-bottom: 1.5rem;
    flex: 1;
}

.card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    color: var(--text-secondary);
    font-weight: 500;
    border-top: 1px solid var(--border-color);
    padding-top: 1rem;
    gap: 1rem;
}

.card-footer .step-count {
    white-space: nowrap;
    flex-shrink: 0;
    font-size: 0.9rem;
}

.card-footer .start-btn {
    flex-shrink: 0;
    flex-grow: 1;
    justify-content: center;
}

.card-footer-actions {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    flex-grow: 1;
    justify-content: flex-end;
}

/* ----------------------
   Viewer Layout
   ---------------------- */
.viewer-layout {
    max-width: 860px;
    width: 100%;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: clamp(0.4rem, 1dvh, 0.75rem);
    flex: 1;
    min-height: 0;
    overflow: hidden;
}

.step-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 0;
    overflow: hidden;
}

.viewer-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: clamp(0.5rem, 1.5dvh, 1rem) 1.5rem;
}

.viewer-title h2 {
    font-size: clamp(1rem, 2.5dvh, 1.25rem);
    margin-bottom: 0.15rem;
}

.step-counter {
    font-size: clamp(0.7rem, 1.6dvh, 0.9rem);
    color: var(--text-secondary);
    font-weight: 500;
}

.progress-bar-container {
    height: 6px;
    background: var(--border-color);
    border-radius: 99px;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background: var(--accent-color);
    transition: width 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.step-card {
    padding: clamp(0.75rem, 2dvh, 2rem);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    flex: 1;
}

.step-title {
    font-size: clamp(17px, 2.5dvh, 20px);
    margin-bottom: clamp(0.3rem, 0.8dvh, 0.5rem);
}

.step-image-container {
    width: 100%;
    max-height: clamp(25dvh, 35dvh, 40dvh);
    margin-bottom: clamp(0.4rem, 1dvh, 1rem);
    display: flex;
    justify-content: center;
    border-radius: var(--radius-sm);
    overflow: hidden;
    border: 1px solid var(--border-color);
    flex-shrink: 0;
}

.step-image {
    max-width: 100%;
    max-height: clamp(25dvh, 35dvh, 40dvh);
    object-fit: contain;
    display: block;
}

.step-text {
    font-size: clamp(14px, 1.8dvh, 15px);
    line-height: 1.5;
    color: var(--text-primary);
    margin-bottom: clamp(0.5rem, 1dvh, 1rem);
}

/* Scrollable area for text + interactive fields */
.step-scroll-area {
    flex: 1;
    overflow-y: auto;
    min-height: 0;
    position: relative;
}

.step-scroll-area::after {
    content: '';
    position: sticky;
    bottom: 0;
    display: block;
    height: 2rem;
    background: linear-gradient(transparent, var(--bg-card));
    pointer-events: none;
    margin-top: -2rem;
    transition: opacity 0.2s ease;
}

.step-scroll-area.scroll-at-bottom::after {
    opacity: 0;
    pointer-events: none;
}

.step-scroll-area .step-text-list {
    font-size: clamp(14px, 1.8dvh, 15px);
    line-height: 1.5;
    color: var(--text-primary);
    margin-bottom: clamp(0.5rem, 1dvh, 1rem);
    padding-left: 1.25rem;
}

.step-scroll-area .step-text-list li {
    margin-bottom: 0.25rem;
}

/* Alerts / Warnings */
.alert {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 1rem;
    border-radius: var(--radius-sm);
    margin-bottom: 1.5rem;
    font-weight: 500;
    line-height: 1.5;
}

.alert-info { background: var(--info-bg); color: var(--info); border: 1px solid var(--info); }
.alert-warning { background: var(--warning-bg); color: var(--warning); border: 1px solid var(--warning); }
.alert-critical { background: var(--critical-bg); color: var(--critical); border: 1px solid var(--critical); }

/* Data Collection */
.data-collection {
    background: var(--bg-main);
    padding: 1.5rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    margin-top: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.data-collection label {
    font-weight: 600;
    font-size: 1.05rem;
}

.modern-input {
    width: 100%;
    padding: 0.75rem 1rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    background: var(--bg-card);
    color: var(--text-primary);
    font-size: 1rem;
    transition: border-color 0.2s;
}

.modern-input:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 2px var(--info-bg);
}

/* Checkbox specific */
.checkbox-container {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    font-size: 1.1rem !important;
}

.checkbox-container input {
    width: 1.5rem;
    height: 1.5rem;
    accent-color: var(--accent-color);
    cursor: pointer;
}

/* Footer Navigation */
.viewer-footer {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    padding: 0.75rem 1rem;
    margin-top: auto;
    border-top: 1px solid var(--border-color);
    background: var(--bg-main);
    position: sticky;
    bottom: 0;
    z-index: 100;
}
.footer-left { justify-self: start; }
.footer-center { justify-self: center; }
.footer-right { justify-self: end; }

.viewer-footer .btn {
    padding: 0.5rem 1.25rem;
    font-size: 0.9rem;
}

/* ----------------------
   Creator View
   ---------------------- */
.creator-landing-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-top: 1rem;
}

@media (max-width: 640px) {
    .creator-landing-grid {
        grid-template-columns: 1fr;
    }
}

.creator-landing-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 1rem;
    padding: 2.5rem 2rem;
    cursor: pointer;
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    background: var(--bg-card);
    box-shadow: var(--shadow-sm);
    transition: all 0.25s ease;
    min-height: 220px;
    justify-content: center;
}

.creator-landing-card:hover {
    border-color: var(--accent-color);
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.creator-landing-card h3 {
    font-size: 1.2rem;
    font-weight: 600;
}

.creator-landing-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.5;
}

.creator-landing-card .upload-icon {
    font-size: 2.5rem;
    color: var(--accent-color);
}

/* Step type selector inside editor steps */
.step-type-selector {
    display: flex;
    gap: 0.4rem;
    flex-wrap: wrap;
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.step-type-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.3rem 0.7rem;
    border-radius: 99px;
    border: 1px solid var(--border-color);
    background: transparent;
    color: var(--text-secondary);
    font-size: 0.82rem;
    cursor: pointer;
    transition: all 0.15s;
}

.step-type-btn:hover:not(.active) {
    background: var(--border-color);
    color: var(--text-primary);
}

.step-type-btn.active {
    border-color: var(--accent-color);
    background: var(--accent-color);
    color: white;
}

.confirmation-field {
    background: var(--warning-bg);
    border: 1px solid var(--warning);
    border-radius: var(--radius-sm);
    padding: 1rem;
    margin-top: 0.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.confirmation-field label {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--warning);
}

.checklist-editor-items {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.checklist-editor-item {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.checklist-editor-item input.modern-input {
    flex: 1;
}

/* Editor step header (step number + delete button) */
.editor-step-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-color);
}

.editor-step-num {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* Measurement editor rows */
.measure-editor-row {
    display: flex;
    gap: 0.5rem;
    align-items: center;
    flex-wrap: wrap;
    margin-bottom: 0.5rem;
    padding: 0.75rem;
    background: var(--bg-main);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
}

.measure-editor-row input {
    flex: 1;
    min-width: 80px;
}

/* Measurement viewer block */
.measurement-block {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-top: 1rem;
    background: var(--bg-main);
    padding: 1.25rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
}

.measurement-row {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.meas-label {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
}

.meas-ref {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.meas-unit {
    font-weight: 500;
    color: var(--text-secondary);
    white-space: nowrap;
}


/* Viewer: embedded checklist inside a step */
.embedded-checklist {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-top: 1rem;
    background: var(--bg-main);
    padding: 1.25rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
}

.embedded-checklist-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1rem;
    cursor: pointer;
}

.embedded-checklist-item input[type="checkbox"] {
    width: 1.3rem;
    height: 1.3rem;
    accent-color: var(--accent-color);
}

/* Viewer: confirmation step */
.confirmation-viewer {
    background: var(--warning-bg);
    border: 1px solid var(--warning);
    border-radius: var(--radius-sm);
    padding: 1.25rem;
    margin-top: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.confirmation-viewer .confirm-question {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--warning);
}

/* Creator landing page */
.creator-dashboard-wrap {
    max-width: 860px;
    margin: 0 auto;
}

.upload-zone {
    border: 2px dashed var(--accent-color);
    border-radius: var(--radius-md);
    padding: 3rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2rem;
    background: var(--bg-card);
}

.upload-zone:hover {
    background: var(--info-bg);
    border-color: var(--info);
    transform: translateY(-2px);
}

.upload-icon {
    font-size: 3rem;
    color: var(--accent-color);
}

.manual-create-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    padding: 2rem;
    text-align: center;
    cursor: pointer;
    border: 2px solid transparent;
    min-height: 200px;
}

.manual-create-card:hover {
    border-color: var(--accent-color);
}

.creator-editor-layout {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    max-width: 800px;
    margin: 0 auto;
}

.editor-panel {
    padding: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.form-group label {
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.form-group textarea {
    min-height: 100px;
    resize: vertical;
    font-family: inherit;
}

.editor-step {
    border: 1px solid var(--border-color);
    padding: 1.5rem;
    border-radius: var(--radius-sm);
    margin-bottom: 1rem;
    position: relative;
    background: var(--bg-card);
}

.delete-step-btn {
    color: var(--critical);
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
}

.delete-step-btn:hover {
    background: var(--critical-bg);
    border-color: var(--critical);
}

.add-step-btn-container {
    text-align: center;
    margin: 2rem 0;
}

/* ----------------------
   Modal Overlay
   ---------------------- */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 999;
    animation: fadeIn 0.2s ease;
    overflow-y: auto;
    padding: 2rem 0;
}

.modal-box {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 2rem;
    max-width: 480px;
    width: 90%;
    margin: auto;
    box-shadow: var(--shadow-md);
}

.modal-box h3 {
    margin-bottom: 0.75rem;
    font-size: 1.2rem;
}

.modal-box p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.5;
    font-size: 0.95rem;
}

.modal-actions {
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
    margin-top: 1rem;
}

/* ----------------------
   Document Type Selection
   ---------------------- */
.doc-type-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 1.5rem;
    margin-top: 1rem;
}

.doc-type-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 1rem;
    padding: 2rem 1.5rem;
    cursor: pointer;
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    background: var(--bg-card);
    transition: all 0.25s ease;
}

.doc-type-card:hover {
    border-color: var(--accent-color);
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.doc-type-icon {
    font-size: 3rem;
    color: var(--accent-color);
}

.doc-type-card h3 {
    font-size: 1.1rem;
    font-weight: 600;
}

.doc-type-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.4;
}

/* ----------------------
   Media Attachments
   ---------------------- */
.media-upload-area {
    margin-top: 1rem;
    border: 1.5px dashed var(--border-color);
    border-radius: var(--radius-sm);
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.media-upload-area label {
    font-weight: 500;
    font-size: 0.9rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.media-preview-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 0.5rem;
}

.media-preview-item {
    position: relative;
    border-radius: var(--radius-sm);
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.media-preview-item img,
.media-preview-item video {
    width: 120px;
    height: 90px;
    object-fit: cover;
    display: block;
}

.media-preview-item .media-remove-btn {
    position: absolute;
    top: 4px;
    right: 4px;
    background: rgba(0,0,0,0.7);
    color: white;
    border: none;
    border-radius: 50%;
    width: 22px;
    height: 22px;
    cursor: pointer;
    font-size: 0.8rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.media-pdf-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.75rem;
    background: var(--info-bg);
    border-radius: var(--radius-sm);
    border: 1px solid var(--info);
    font-size: 0.9rem;
    color: var(--info);
}

.step-media-viewer {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
    text-align: center;
}

.step-media-viewer img {
    max-width: 100%;
    max-height: clamp(25dvh, 35dvh, 40dvh);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    cursor: pointer;
    object-fit: contain;
}

.step-media-viewer video {
    max-width: 100%;
    max-height: clamp(25dvh, 35dvh, 40dvh);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
}

/* Spinner */
@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.spinning {
    display: inline-block;
    animation: spin 1s linear infinite;
}

/* ----------------------
   Animations
   ---------------------- */
.animate-fade-in {
    animation: fadeIn 0.4s ease-out forwards;
}

.animate-slide-up {
    animation: slideUp 0.4s ease-out forwards;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ----------------------
   Responsive
   ---------------------- */
@media (max-width: 768px) {
    .main-content {
        padding: 1rem;
    }
    .app-header {
        padding: 1rem;
        flex-wrap: wrap;
        gap: 0.5rem;
    }
    .header-left {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
    .viewer-footer {
        display: flex;
        flex-direction: row;
        padding: 0.4rem 0.75rem;
        gap: 0.5rem;
    }
    .footer-left, .footer-right {
        flex: 1;
        display: flex;
        min-width: 0;
    }
    .footer-center {
        flex: 0 0 auto;
        display: flex;
    }
    .viewer-footer .btn {
        padding: 0.4rem 0.75rem;
        font-size: 0.8rem;
        min-width: 0;
        width: 100%;
        justify-content: center;
    }
    .viewer-footer .btn-qs {
        padding: 0.4rem 0.75rem;
    }
    .viewer-footer .btn-text,
    .viewer-footer .btn-text-desktop {
        display: none;
    }
    .viewer-footer .btn-text-mobile {
        display: inline !important;
    }
    #qs-btn {
        position: static;
        transform: none;
    }
}

/* -- ACCORDION VIEWER STYLES -------------------------------------------------- */
.accordion-card {
    border-radius: var(--radius-md);
    overflow: hidden;
    margin-bottom: 1rem;
    border: 1px solid var(--border-color);
    background: var(--bg-panel);
    transition: box-shadow 0.2s, border-color 0.2s;
}

.accordion-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1.25rem;
    cursor: pointer;
    background: var(--bg-panel);
    user-select: none;
    transition: background-color 0.2s;
}
.accordion-header:hover {
    background: var(--bg-card);
}

.accordion-header-left {
    display: flex;
    align-items: center;
    gap: 0.85rem;
}

.accordion-step-num {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2rem;
    height: 2rem;
    border-radius: 50%;
    background: var(--accent-color);
    color: #fff;
    font-weight: 700;
    font-size: 0.9rem;
    flex-shrink: 0;
}
.accordion-step-num.done {
    background: var(--success);
}

.accordion-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.accordion-chevron {
    color: var(--text-secondary);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.accordion-card.open .accordion-chevron {
    transform: rotate(90deg);
}

.accordion-body-wrapper {
    display: grid;
    grid-template-rows: 0fr;
    transition: grid-template-rows 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.accordion-card.open .accordion-body-wrapper {
    grid-template-rows: 1fr;
}

.accordion-body {
    overflow: hidden;
}
.accordion-body-inner {
    padding: 1.25rem;
    border-top: 1px solid var(--border-color);
}

/* ── Foto-Dokumentation ───────────────────────────────── */
.foto-capture-area {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    transition: border-color 0.2s ease;
}
.foto-capture-area:hover {
    border-color: var(--accent-color);
}

.foto-anweisung {
    font-weight: 600;
    line-height: 1.4;
}

.foto-preview {
    margin-bottom: 0.75rem;
    border-radius: var(--radius-sm);
    overflow: hidden;
    border: 2px solid var(--border-color);
    background: var(--bg-panel);
    display: inline-block;
}
.foto-preview img {
    width: auto;
    max-width: 100%;
    height: auto;
    max-height: 40vh;
    object-fit: contain;
    display: block;
}

.foto-capture-btn {
    gap: 0.4rem;
}

@media (max-width: 767px) {
    .foto-preview {
        display: block;
    }
    .foto-preview img {
        max-height: 35vh;
        max-width: 100%;
    }
}