/* IFConverter Web - Stylesheet */

:root {
    --bg-primary: #f3f7fb;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f8fbff;
    --bg-accent: #e5edf7;
    --bg-soft: #eef5fb;
    --text-primary: #1d2c3c;
    --text-secondary: #5f7388;
    --text-muted: #91a3b5;
    --accent-primary: #2f80ed;
    --accent-secondary: #14b8a6;
    --accent-gradient: linear-gradient(135deg, #2f80ed 0%, #5aa7ff 48%, #14b8a6 100%);
    --error: #d94b61;
    --warning: #d99824;
    --success: #1f9d73;
    --border-color: rgba(87, 115, 143, 0.20);
    --border-strong: rgba(87, 115, 143, 0.32);
    --border-radius: 18px;
    --shadow: 0 18px 48px rgba(24, 45, 72, 0.08);
    --shadow-soft: 0 10px 24px rgba(24, 45, 72, 0.06);
    --transition: all 0.3s ease;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background:
        radial-gradient(circle at top left, rgba(47, 128, 237, 0.10), transparent 28%),
        radial-gradient(circle at top right, rgba(20, 184, 166, 0.08), transparent 24%),
        linear-gradient(180deg, #f7fbff 0%, var(--bg-primary) 40%, #edf4fa 100%);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 28px 24px 40px;
}

/* Header */
header {
    text-align: center;
    margin-bottom: 32px;
    padding: 36px 40px;
    background: rgba(255, 255, 255, 0.82);
    border: 1px solid rgba(255, 255, 255, 0.92);
    border-radius: 28px;
    box-shadow: var(--shadow);
    backdrop-filter: blur(16px);
}

h1 {
    font-size: 2.75rem;
    color: var(--text-primary);
    margin-bottom: 12px;
    letter-spacing: -0.04em;
}

.web-badge {
    display: inline-flex;
    align-items: center;
    padding: 6px 12px;
    border-radius: 999px;
    font-size: 0.35em;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    vertical-align: middle;
    margin-left: 10px;
    color: #ffffff;
    background: var(--accent-gradient);
    box-shadow: 0 10px 24px rgba(47, 128, 237, 0.20);
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
    max-width: 760px;
    margin: 0 auto;
}

/* Drop Zone */
.drop-zone {
    background: rgba(255, 255, 255, 0.88);
    border: 1.5px dashed rgba(47, 128, 237, 0.24);
    border-radius: var(--border-radius);
    padding: 50px 30px;
    text-align: center;
    transition: var(--transition);
    margin-bottom: 30px;
    box-shadow: var(--shadow);
}

.drop-zone:hover,
.drop-zone.drag-over {
    border-color: rgba(47, 128, 237, 0.5);
    background: rgba(255, 255, 255, 0.98);
    transform: translateY(-3px);
}

.drop-zone.drag-over {
    box-shadow: 0 24px 50px rgba(47, 128, 237, 0.14);
}

.drop-icon {
    width: 76px;
    height: 76px;
    margin: 0 auto 20px;
    border-radius: 24px;
    background: var(--accent-gradient);
    box-shadow: 0 18px 40px rgba(47, 128, 237, 0.18);
    position: relative;
}

.drop-icon::before {
    content: "";
    position: absolute;
    inset: 16px 18px;
    background: rgba(255, 255, 255, 0.92);
    border-radius: 14px;
}

.drop-icon::after {
    content: "";
    position: absolute;
    left: 24px;
    top: 24px;
    width: 28px;
    height: 8px;
    border-radius: 999px;
    background: rgba(47, 128, 237, 0.24);
}

.drop-zone h2 {
    color: var(--accent-primary);
    margin-bottom: 15px;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.drop-zone p {
    color: var(--text-secondary);
    margin: 10px 0;
}

.privacy-note {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 25px !important;
}

/* File Inputs */
.file-inputs {
    display: flex;
    gap: 15px;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 25px;
}

.file-input-wrapper {
    position: relative;
    display: inline-block;
}

.file-input-wrapper input[type="file"] {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 22px;
    border: 1px solid transparent;
    border-radius: 12px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    transition: var(--transition);
    text-decoration: none;
    box-shadow: var(--shadow-soft);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-primary {
    background: var(--accent-gradient);
    color: #ffffff;
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 14px 28px rgba(47, 128, 237, 0.20);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.88);
    color: var(--text-primary);
    border-color: var(--border-color);
}

.btn-secondary:hover:not(:disabled) {
    background: #ffffff;
    transform: translateY(-2px);
    border-color: rgba(47, 128, 237, 0.24);
}

.btn-small {
    padding: 5px 12px;
    font-size: 12px;
    background: #ffffff;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    cursor: pointer;
    transition: var(--transition);
}

.btn-small:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.btn-icon {
    font-size: 1.1em;
}

/* Options Panel */
.options-panel {
    background: rgba(255, 255, 255, 0.88);
    border: 1px solid rgba(255, 255, 255, 0.92);
    border-radius: var(--border-radius);
    padding: 24px;
    margin-bottom: 20px;
    display: none;
    box-shadow: var(--shadow);
}

.options-panel.visible {
    display: block;
}

.options-panel h3 {
    color: var(--accent-primary);
    margin-bottom: 18px;
    font-size: 1.05rem;
    letter-spacing: -0.02em;
}

.options-section + .options-section {
    margin-top: 18px;
    padding-top: 18px;
    border-top: 1px solid var(--border-color);
}

.options-section h4 {
    color: var(--text-primary);
    margin-bottom: 12px;
    font-size: 0.95rem;
    font-weight: 600;
}

.options-grid {
    display: flex;
    gap: 30px;
    flex-wrap: wrap;
}

.option-group {
    display: flex;
    align-items: center;
    gap: 10px;
}

.option-group label {
    color: var(--text-secondary);
    font-size: 0.9rem;
    min-width: 135px;
    font-weight: 500;
}

.option-group select,
.option-group input[type="color"] {
    padding: 8px 12px;
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 0.9rem;
    cursor: pointer;
}

.option-group select:focus,
.option-group input[type="color"]:focus {
    outline: none;
    border-color: rgba(47, 128, 237, 0.45);
    box-shadow: 0 0 0 4px rgba(47, 128, 237, 0.10);
}

.option-group input[type="color"] {
    width: 50px;
    height: 36px;
    padding: 2px;
}

.option-group select:disabled,
.option-group input:disabled {
    opacity: 0.55;
    cursor: not-allowed;
}

.options-note {
    margin-top: 12px;
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* Status Messages */
.status {
    background: rgba(255, 255, 255, 0.9);
    border-radius: var(--border-radius);
    padding: 15px 20px;
    margin-bottom: 20px;
    display: none;
    border-left: 4px solid var(--accent-primary);
    box-shadow: var(--shadow-soft);
}

.status.visible {
    display: block;
}

.status.error {
    background: rgba(217, 75, 97, 0.10);
    border-left-color: var(--error);
}

.status.success {
    background: rgba(31, 157, 115, 0.10);
    border-left-color: var(--success);
}

.status.warning {
    background: rgba(217, 152, 36, 0.11);
    border-left-color: var(--warning);
}

/* Project Info */
.project-info {
    background: rgba(255, 255, 255, 0.88);
    border: 1px solid rgba(255, 255, 255, 0.92);
    border-radius: var(--border-radius);
    padding: 25px;
    margin-bottom: 25px;
    display: none;
    box-shadow: var(--shadow);
}

.project-info.visible {
    display: block;
}

.project-info h3 {
    color: var(--accent-primary);
    margin-bottom: 20px;
}

.project-info dl {
    display: grid;
    grid-template-columns: 180px 1fr;
    gap: 10px 20px;
    margin-bottom: 25px;
}

.project-info dt {
    color: var(--text-secondary);
    font-weight: 500;
}

.project-info dd {
    color: var(--text-primary);
}

/* Progress */
.progress-container {
    margin-bottom: 20px;
}

.progress-text {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--bg-soft);
    border-radius: 4px;
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    background: var(--accent-gradient);
    width: 0%;
    transition: width 0.3s ease;
}

.action-buttons {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

/* Log */
.log {
    background: rgba(255, 255, 255, 0.9);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    margin-bottom: 25px;
    display: none;
    overflow: hidden;
    box-shadow: var(--shadow-soft);
}

.log.visible {
    display: block;
}

.log-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 15px;
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    font-size: 0.9rem;
    border-bottom: 1px solid var(--border-color);
}

.log-content {
    padding: 15px;
    max-height: 200px;
    overflow-y: auto;
    font-family: 'Monaco', 'Menlo', 'Consolas', monospace;
    font-size: 12px;
}

.log-entry {
    padding: 3px 0;
    color: var(--text-secondary);
}

.log-entry.info { color: var(--accent-primary); }
.log-entry.success { color: var(--success); }
.log-entry.warning { color: var(--warning); }
.log-entry.error { color: var(--error); }

/* Pages Container */
.pages-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(450px, 1fr));
    gap: 25px;
}

.page-card {
    background: rgba(255, 255, 255, 0.94);
    border: 1px solid rgba(255, 255, 255, 0.94);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.page-card h4 {
    margin: 0;
    padding: 15px 20px;
    background: linear-gradient(180deg, #fbfdff 0%, #f1f7fd 100%);
    color: var(--text-primary);
    font-weight: 600;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
}

.page-card h4 span {
    font-size: 0.8em;
    color: var(--text-secondary);
    font-weight: normal;
}

.page-canvas-wrapper {
    padding: 20px;
    background: linear-gradient(180deg, #f4f8fc 0%, #eaf1f7 100%);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 200px;
}

.page-canvas-wrapper {
    cursor: pointer;
}

.page-canvas-wrapper canvas {
    max-width: 100%;
    height: auto;
    border-radius: 12px;
    border: 1px solid rgba(117, 141, 167, 0.18);
    box-shadow: 0 18px 36px rgba(43, 63, 87, 0.14);
}

/* Lightbox */
.lightbox-overlay {
    position: fixed;
    inset: 0;
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    box-sizing: border-box;
}

.lightbox-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(20, 33, 48, 0.35);
    cursor: pointer;
}

.lightbox-content {
    position: relative;
    display: flex;
    flex-direction: column;
    width: 100vw;
    height: 100vh;
    max-width: 100%;
    max-height: 100%;
    background: rgba(247, 251, 255, 0.98);
    border-radius: 0;
    box-shadow: none;
    overflow: hidden;
}

.lightbox-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    background: rgba(255, 255, 255, 0.94);
    flex-shrink: 0;
    border-bottom: 1px solid var(--border-color);
}

.lightbox-title {
    color: var(--text-primary);
    font-weight: 600;
}

.lightbox-close {
    background: transparent;
    border: 1px solid transparent;
    color: var(--text-primary);
    font-size: 28px;
    line-height: 1;
    cursor: pointer;
    padding: 0 8px;
    border-radius: 4px;
}

.lightbox-close:hover {
    background: var(--bg-tertiary);
    border-color: var(--border-color);
}

.lightbox-scroll {
    overflow: auto;
    flex: 1;
    min-width: 200px;
    min-height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    cursor: zoom-in;
    background: linear-gradient(180deg, #f8fbff 0%, #edf4fa 100%);
}

.lightbox-image {
    display: block;
    box-shadow: 0 24px 60px rgba(32, 53, 76, 0.20);
}

.lightbox-image.fit-screen {
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
    object-fit: contain;
}

.lightbox-image.actual-size {
    max-width: none;
    max-height: none;
    width: auto;
    height: auto;
    object-fit: none;
}

.lightbox-scroll.actual-size-mode {
    align-items: flex-start;
    justify-content: flex-start;
    cursor: zoom-out;
}

.lightbox-loading {
    padding: 40px;
    color: var(--text-secondary);
}

/* Page select modal */
.page-select-overlay .lightbox-content {
    max-width: 420px;
    max-height: 85vh;
    width: auto;
    height: auto;
    border-radius: var(--border-radius);
    box-shadow: 0 24px 60px rgba(24, 45, 72, 0.18);
}

.page-select-actions {
    padding: 10px 16px;
    display: flex;
    gap: 10px;
    border-bottom: 1px solid var(--border-color);
}

.page-select-list {
    padding: 16px;
    max-height: 50vh;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.page-select-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 10px;
    border-radius: 6px;
    cursor: pointer;
    color: var(--text-primary);
}

.page-select-item:hover {
    background: var(--bg-tertiary);
}

.page-select-item input {
    cursor: pointer;
    width: 18px;
    height: 18px;
}

.page-select-footer {
    padding: 16px;
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    border-top: 1px solid var(--border-color);
}

.page-canvas-wrapper .loading {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.page-actions {
    padding: 15px 20px;
    display: flex;
    gap: 10px;
    justify-content: center;
    background: linear-gradient(180deg, #ffffff 0%, #f8fbff 100%);
    border-top: 1px solid var(--border-color);
}

/* Footer */
footer {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

footer a {
    color: var(--accent-primary);
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}

/* Responsive */
@media (max-width: 768px) {
    h1 {
        font-size: 1.8rem;
    }
    
    .file-inputs {
        flex-direction: column;
        align-items: center;
    }
    
    .options-grid {
        flex-direction: column;
        gap: 15px;
    }
    
    .project-info dl {
        grid-template-columns: 1fr;
    }
    
    .pages-container {
        grid-template-columns: 1fr;
    }
    
    .action-buttons {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.page-card {
    animation: fadeIn 0.3s ease;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: #edf3f9;
}

::-webkit-scrollbar-thumb {
    background: #c8d7e6;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #aebfd2;
}