/* Reset e variáveis */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --primary: #4f46e5;
    --primary-dark: #4338ca;
    --secondary: #06b6d4;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --bg: #f8fafc;
    --surface: #ffffff;
    --text: #1e293b;
    --text-muted: #64748b;
    --border: #e2e8f0;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --radius: 12px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: linear-gradient(135deg, #eef2ff 0%, #f0f9ff 100%);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
    width: 100%;
}

.hidden {
    display: none !important;
}

/* Header */
.site-header {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
    padding: 3rem 0 2.5rem;
    text-align: center;
    box-shadow: var(--shadow);
}

.site-header h1 {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.site-header h1 i {
    margin-right: 0.5rem;
}

.subtitle {
    font-size: clamp(0.95rem, 2vw, 1.1rem);
    opacity: 0.95;
    max-width: 700px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* Main */
main {
    flex: 1;
    padding: 2.5rem 1rem;
}

/* Upload zone */
.upload-section {
    margin-bottom: 2.5rem;
}

.drop-zone {
    background: var(--surface);
    border: 3px dashed var(--border);
    border-radius: var(--radius);
    padding: 3rem 2rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: var(--shadow);
}

.drop-zone:hover,
.drop-zone.drag-over {
    border-color: var(--primary);
    background: #f0f4ff;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.drop-icon {
    font-size: 4rem;
    color: var(--primary);
    margin-bottom: 1rem;
}

.drop-zone-content h2 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--text);
}

.drop-zone-content p {
    color: var(--text-muted);
    margin: 0.75rem 0;
}

.hint {
    font-size: 0.875rem;
    margin-top: 1rem;
}

/* Buttons */
.btn-primary, .btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: inherit;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow);
}

.btn-secondary {
    background: var(--surface);
    color: var(--primary);
    border: 2px solid var(--primary);
}

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

/* Results */
.results-section {
    animation: fadeIn 0.4s ease;
}

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

.results-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.preview-card, .info-card, .print-card {
    background: var(--surface);
    border-radius: var(--radius);
    padding: 1.75rem;
    box-shadow: var(--shadow);
}

.preview-card h2, .info-card h2, .print-card h2, .info-section h2 {
    font-size: 1.25rem;
    margin-bottom: 1.25rem;
    color: var(--text);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.preview-card h2 i, .info-card h2 i, .print-card h2 i {
    color: var(--primary);
}

.preview-wrapper {
    background: #f1f5f9;
    border-radius: 8px;
    padding: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 250px;
    overflow: hidden;
}

#preview-image {
    max-width: 100%;
    max-height: 350px;
    border-radius: 4px;
    box-shadow: var(--shadow);
}

.file-name {
    margin-top: 0.75rem;
    font-size: 0.9rem;
    color: var(--text-muted);
    word-break: break-all;
    text-align: center;
}

/* Info list */
.info-list {
    list-style: none;
}

.info-list li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.85rem 0;
    border-bottom: 1px solid var(--border);
    flex-wrap: wrap;
    gap: 0.5rem;
}

.info-list li:last-child {
    border-bottom: none;
}

.label {
    color: var(--text-muted);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.label i {
    color: var(--primary);
    width: 18px;
    text-align: center;
}

.value {
    font-weight: 600;
    color: var(--text);
    text-align: right;
}

.value.quality {
    padding: 0.25rem 0.75rem;
    border-radius: 999px;
    font-size: 0.85rem;
}

.quality-excellent { background: #d1fae5; color: #065f46; }
.quality-good { background: #dbeafe; color: #1e40af; }
.quality-medium { background: #fef3c7; color: #92400e; }
.quality-low { background: #fee2e2; color: #991b1b; }

/* Print card */
.print-card {
    margin-bottom: 1.5rem;
}

.card-description {
    color: var(--text-muted);
    margin-bottom: 1.25rem;
    font-size: 0.95rem;
}

.dpi-selector {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
    padding: 1rem;
    background: #f8fafc;
    border-radius: 8px;
    flex-wrap: wrap;
}

.dpi-selector label {
    font-weight: 600;
    color: var(--text);
}

.dpi-selector input {
    padding: 0.5rem 0.75rem;
    border: 2px solid var(--border);
    border-radius: 6px;
    font-size: 1rem;
    width: 100px;
    font-family: inherit;
}

.dpi-selector input:focus {
    outline: none;
    border-color: var(--primary);
}

.print-sizes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.print-size-item {
    background: linear-gradient(135deg, #f0f4ff 0%, #f0f9ff 100%);
    padding: 1.25rem;
    border-radius: 8px;
    border-left: 4px solid var(--primary);
}

.print-size-item.recommended {
    border-left-color: var(--success);
    background: linear-gradient(135deg, #ecfdf5 0%, #f0fdf4 100%);
}

.print-size-item .dpi-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-transform: uppercase;
    font-weight: 600;
    letter-spacing: 0.5px;
}

.print-size-item .dimension {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text);
    margin: 0.4rem 0;
}

.print-size-item .dimension-cm {
    font-size: 0.95rem;
    color: var(--text-muted);
}

.print-size-item .quality-label {
    display: inline-block;
    margin-top: 0.6rem;
    font-size: 0.8rem;
    font-weight: 600;
    padding: 0.2rem 0.6rem;
    border-radius: 4px;
}

/* Paper comparison */
.paper-comparison {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 2px solid var(--border);
}

.paper-comparison h3 {
    font-size: 1.1rem;
    margin-bottom: 0.75rem;
    color: var(--text);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.paper-comparison h3 i {
    color: var(--primary);
}

.paper-sizes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 0.75rem;
}

.paper-item {
    padding: 1rem;
    border-radius: 8px;
    border: 2px solid var(--border);
    background: var(--surface);
    transition: transform 0.2s ease;
}

.paper-item:hover {
    transform: translateY(-2px);
}

.paper-item.compatible {
    border-color: var(--success);
    background: #ecfdf5;
}

.paper-item.incompatible {
    border-color: var(--danger);
    background: #fef2f2;
    opacity: 0.85;
}

.paper-item .paper-name {
    font-weight: 700;
    font-size: 1rem;
    margin-bottom: 0.25rem;
}

.paper-item .paper-size {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.paper-item .paper-status {
    font-size: 0.85rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.paper-item.compatible .paper-status { color: var(--success); }
.paper-item.incompatible .paper-status { color: var(--danger); }

/* Actions */
.actions {
    text-align: center;
    margin: 2rem 0;
}

/* Info section */
.info-section {
    background: var(--surface);
    border-radius: var(--radius);
    padding: 2rem;
    box-shadow: var(--shadow);
    margin-top: 2rem;
}

.info-section h2 i {
    color: var(--primary);
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1rem;
    margin-top: 1.25rem;
}

.info-box {
    padding: 1.5rem;
    border-radius: 8px;
    background: #f8fafc;
    text-align: center;
    transition: transform 0.2s ease;
    border: 2px solid transparent;
}

.info-box:hover {
    transform: translateY(-3px);
}

.info-box.highlight {
    background: linear-gradient(135deg, #ecfdf5 0%, #f0fdf4 100%);
    border-color: var(--success);
}

.info-box i {
    font-size: 2rem;
    color: var(--primary);
    margin-bottom: 0.75rem;
}

.info-box.highlight i {
    color: var(--success);
}

.info-box h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    color: var(--text);
}

.info-box p {
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* Footer */
.site-footer {
    background: #1e293b;
    color: #cbd5e1;
    padding: 1.5rem 0;
    text-align: center;
    margin-top: 2rem;
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 768px) {
    .results-grid {
        grid-template-columns: 1fr;
    }

    .drop-zone {
        padding: 2rem 1rem;
    }

    .drop-icon {
        font-size: 3rem;
    }

    .preview-card, .info-card, .print-card, .info-section {
        padding: 1.25rem;
    }

    .info-list li {
        font-size: 0.95rem;
    }
}