:root {
    --primary-color: #004367;
    --primary-light: #006b9e;
    --primary-dark: #002236;
    --text-main: #ffffff;
    --text-muted: #a0aec0;
    --bg-dark: #0f172a;
    --bg-glass: rgba(0, 67, 103, 0.25);
    --border-glass: rgba(255, 255, 255, 0.1);
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-main);
    height: 100vh;
    overflow: hidden;
}

.app-container {
    display: flex;
    height: 100vh;
    width: 100vw;
}

/* Sidebar */
.sidebar {
    width: 380px;
    background: var(--bg-glass);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-right: 1px solid var(--border-glass);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    z-index: 10;
    box-shadow: 4px 0 24px rgba(0,0,0,0.5);
}

.sidebar-header {
    padding: 24px;
    border-bottom: 1px solid var(--border-glass);
    background: rgba(0, 34, 54, 0.5);
}

.sidebar-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: 0.5px;
}

#generator-form {
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.control-group h3 {
    font-size: 0.9rem;
    text-transform: uppercase;
    color: var(--primary-light);
    margin-bottom: 16px;
    letter-spacing: 1px;
}

.control-group select,
.control-group input[type="text"] {
    width: 100%;
    padding: 12px;
    background: rgba(0,0,0,0.2);
    border: 1px solid var(--border-glass);
    border-radius: 8px;
    color: white;
    font-family: 'Inter', sans-serif;
    margin-bottom: 12px;
    outline: none;
    transition: border-color 0.2s;
}

.control-group select:focus,
.control-group input[type="text"]:focus {
    border-color: var(--primary-light);
}

.control-group select option {
    background: var(--bg-dark);
    color: white;
}

.input-field {
    margin-bottom: 16px;
}

.input-field label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 6px;
}

.input-field input[type="file"] {
    width: 100%;
    font-size: 0.85rem;
    color: var(--text-muted);
    padding: 8px 0;
}

.file-input-row {
    display: flex;
    align-items: center;
    gap: 6px;
}

.file-input-row input[type="file"] {
    flex: 1;
    min-width: 0;
}

.btn-clear-img {
    flex-shrink: 0;
    padding: 5px 10px;
    background: rgba(220, 38, 38, 0.25);
    color: #f87171;
    border: 1px solid rgba(220, 38, 38, 0.4);
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 700;
    cursor: pointer;
    transition: background 0.2s, color 0.2s;
    white-space: nowrap;
    display: inline-flex;
    align-items: center;
}

.btn-clear-img:hover {
    background: rgba(220, 38, 38, 0.5);
    color: #fecaca;
}

/* Crop re-edit button */
.btn-crop-img {
    flex-shrink: 0;
    padding: 5px 10px;
    background: rgba(0, 107, 158, 0.3);
    color: #60c8f5;
    border: 1px solid rgba(0, 107, 158, 0.5);
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 700;
    cursor: pointer;
    transition: background 0.2s, color 0.2s, transform 0.1s;
    white-space: nowrap;
    display: inline-flex;
    align-items: center;
}

.btn-crop-img:hover {
    background: rgba(0, 107, 158, 0.55);
    color: #a8e8fd;
    transform: scale(1.05);
}

.checkbox-row {
    margin-top: 10px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.checkbox-label {
    margin: 0;
    cursor: pointer;
    text-transform: none;
}

.position-row {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 6px;
}

.position-label {
    font-size: 0.78rem;
    color: var(--text-muted);
    white-space: nowrap;
}

.align-select {
    flex: 1;
    padding: 6px 8px;
    background: rgba(0,0,0,0.2);
    border: 1px solid var(--border-glass);
    border-radius: 6px;
    color: white;
    font-family: 'Inter', sans-serif;
    font-size: 0.78rem;
    outline: none;
}

.align-select option {
    background: var(--bg-dark);
    color: white;
}

/* ─── Position Sliders ─── */
.pos-sliders-group {
    margin-top: 8px;
    padding: 8px 10px;
    background: rgba(0, 67, 103, 0.18);
    border: 1px solid rgba(0, 107, 158, 0.25);
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.pos-slider-row {
    display: flex;
    align-items: center;
    gap: 8px;
}

.pos-axis-label {
    font-size: 1rem;
    color: #60c8f5;
    width: 18px;
    text-align: center;
    flex-shrink: 0;
    cursor: help;
}

.pos-slider {
    flex: 1;
    accent-color: #006b9e;
    height: 3px;
    appearance: none;
    -webkit-appearance: none;
    background: rgba(255,255,255,0.15);
    border-radius: 2px;
    outline: none;
}

.pos-slider::-webkit-slider-thumb {
    appearance: none;
    -webkit-appearance: none;
    width: 13px;
    height: 13px;
    border-radius: 50%;
    background: #006b9e;
    cursor: pointer;
    transition: transform 0.1s;
}

.pos-slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    background: #60c8f5;
}

.pos-val {
    font-size: 0.72rem;
    color: #60c8f5;
    font-weight: 600;
    min-width: 28px;
    text-align: right;
    font-variant-numeric: tabular-nums;
}

/* ─── Range Sliders (standard) ─── */
.color-picker-group {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
}

.color-picker-group label {
    font-size: 0.9rem;
    color: var(--text-muted);
}

input[type="color"] {
    background: none;
    border: none;
    width: 40px;
    height: 40px;
    cursor: pointer;
}

.range-field {
    margin-bottom: 12px;
}
.range-field label {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 6px;
}
.range-field span {
    color: var(--text-main);
    font-weight: 600;
}
.advanced-controls {
    padding-bottom: 10px;
    margin-top: 10px;
    border-top: 1px solid rgba(255,255,255,0.05);
    padding-top: 16px;
}
input[type="range"] {
    width: 100%;
    accent-color: var(--primary-light);
    height: 4px;
    background: rgba(255,255,255,0.2);
    border-radius: 2px;
    appearance: none;
    outline: none;
    margin-top: 6px;
}
input[type="range"]::-webkit-slider-thumb {
    appearance: none;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--primary-light);
    cursor: pointer;
}

/* ─── Actions ─── */
.actions {
    margin-top: auto;
    padding-top: 16px;
    border-top: 1px solid var(--border-glass);
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.primary-btn {
    flex: 1;
    min-width: 0;
    padding: 14px 10px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s, transform 0.1s;
}

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

.primary-btn:active {
    transform: scale(0.98);
}

/* Save Button */
.save-btn {
    flex: 1;
    min-width: 0;
    padding: 14px 10px;
    background: linear-gradient(135deg, #0d7c3d, #0fa958);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s, transform 0.1s, box-shadow 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    position: relative;
    overflow: hidden;
}

.save-btn:hover {
    background: linear-gradient(135deg, #0fa958, #12d16a);
    box-shadow: 0 4px 16px rgba(15, 169, 88, 0.35);
}

.save-btn:active {
    transform: scale(0.98);
}

.save-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* View Online Button */
.view-btn {
    flex: 0 0 100%;
    padding: 14px 10px;
    background: rgba(255, 255, 255, 0.05);
    color: white;
    border: 1px solid var(--border-glass);
    border-radius: 8px;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    text-align: center;
    text-decoration: none;
    transition: background 0.2s, border-color 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    box-sizing: border-box;
}

.view-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--primary-light);
}

.view-btn:active {
    transform: scale(0.98);
}

/* Spinner */
.spinner {
    width: 18px;
    height: 18px;
    border: 2px solid rgba(255,255,255,0.3);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

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

/* Save Status */
.save-status {
    width: 100%;
    text-align: center;
    font-size: 0.82rem;
    min-height: 20px;
    transition: opacity 0.3s;
}

.save-status.success {
    color: #4ade80;
}

.save-status.error {
    color: #f87171;
}

/* Preview Area */
.preview-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: #000;
    padding: 24px;
    align-items: center;
    justify-content: center;
}

.preview-header {
    width: 100%;
    display: flex;
    justify-content: space-between;
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-bottom: 12px;
}

.preview-container {
    width: 100%;
    aspect-ratio: 16 / 9;
    background: #1a1a1a;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0,0,0,0.6);
    border: 1px solid var(--border-glass);
}

#preview-frame {
    width: 100%;
    height: 100%;
    border: none;
}

/* Scrollbar styling */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: rgba(0,0,0,0.1);
}
::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--primary-light);
}

/* ════════════════════════════════════════
   CROP MODAL
════════════════════════════════════════ */
.crop-modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.88);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(4px);
    animation: fadeInOverlay 0.2s ease;
}

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

.crop-modal {
    background: linear-gradient(160deg, #0c1f30, #0f172a);
    border: 1px solid rgba(0, 107, 158, 0.45);
    border-radius: 18px;
    padding: 24px;
    width: 540px;
    max-width: 96vw;
    display: flex;
    flex-direction: column;
    gap: 16px;
    box-shadow: 0 30px 80px rgba(0,0,0,0.7), 0 0 0 1px rgba(255,255,255,0.05);
    animation: slideUpModal 0.22s ease;
}

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

.crop-modal-header h3 {
    font-size: 1.05rem;
    font-weight: 700;
    color: #60c8f5;
    margin-bottom: 4px;
}

.crop-hint {
    font-size: 0.78rem;
    color: var(--text-muted);
}

/* Viewport — the visible "frame" the user crops into */
.crop-viewport {
    width: 100%;
    height: 300px;
    position: relative;
    overflow: hidden;
    background: #000;
    border-radius: 12px;
    border: 2px solid rgba(0, 107, 158, 0.5);
    cursor: grab;
    user-select: none;
    flex-shrink: 0;
}

.crop-viewport:active {
    cursor: grabbing;
}

#crop-preview-img {
    position: absolute;
    transform-origin: top left;
    max-width: none;
    max-height: none;
    pointer-events: none;
}

/* Subtle rule-of-thirds overlay */
.crop-frame-overlay {
    position: absolute;
    inset: 0;
    pointer-events: none;
    border-radius: 10px;
    background:
        linear-gradient(rgba(255,255,255,0.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.06) 1px, transparent 1px);
    background-size: 33.33% 33.33%;
    opacity: 0;
    transition: opacity 0.2s;
}

.crop-viewport:hover .crop-frame-overlay {
    opacity: 1;
}

/* Zoom row */
.crop-zoom-row {
    display: flex;
    align-items: center;
    gap: 10px;
}

.crop-zoom-icon {
    font-size: 1rem;
    flex-shrink: 0;
}

.crop-zoom-row input[type="range"] {
    flex: 1;
    accent-color: #006b9e;
    margin-top: 0;
}

/* Crop action buttons */
.crop-actions {
    display: flex;
    gap: 12px;
    justify-content: flex-end;
}

.btn-crop-cancel {
    padding: 10px 20px;
    background: rgba(255,255,255,0.07);
    color: var(--text-muted);
    border: 1px solid rgba(255,255,255,0.12);
    border-radius: 8px;
    cursor: pointer;
    font-family: 'Inter', sans-serif;
    font-size: 0.85rem;
    transition: background 0.2s, color 0.2s;
}

.btn-crop-cancel:hover {
    background: rgba(255,255,255,0.13);
    color: #fff;
}

.btn-crop-confirm {
    padding: 10px 24px;
    background: linear-gradient(135deg, #004367, #006b9e);
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 700;
    font-family: 'Inter', sans-serif;
    font-size: 0.85rem;
    transition: background 0.2s, box-shadow 0.2s, transform 0.1s;
    box-shadow: 0 4px 14px rgba(0, 107, 158, 0.35);
}

.btn-crop-confirm:hover {
    background: linear-gradient(135deg, #006b9e, #009ed6);
    box-shadow: 0 6px 20px rgba(0, 158, 214, 0.45);
}

.btn-crop-confirm:active {
    transform: scale(0.97);
}