/* =====================================================
   Rescale PDF Tool - Styles
   ===================================================== */

:root {
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --secondary: #f3f4f6;
    --secondary-hover: #e5e7eb;
    --success: #10b981;
    --success-hover: #059669;
    --danger: #ef4444;
    --text: #1f2937;
    --text-light: #6b7280;
    --border: #e5e7eb;
    --border-dark: #d1d5db;
    --bg-light: #f9fafb;
    --bg-white: #ffffff;
    --radius: 12px;
    --radius-sm: 8px;
    --shadow: 0 1px 3px rgba(0,0,0,0.06);
    --shadow-hover: 0 4px 12px rgba(0,0,0,0.1);
    --container-max: 720px;
}

/* ===== Upload Area ===== */
.upload-area {
    max-width: var(--container-max);
    margin: 0 auto 20px;
    border: 2px dashed var(--border-dark);
    border-radius: var(--radius);
    background: var(--bg-light);
    padding: 40px 20px;
    text-align: center;
    cursor: pointer;
    transition: border-color 0.2s, background 0.2s;
}
.upload-area:hover {
    border-color: var(--primary);
    background: #f0f4ff;
}
.upload-area.drag-over {
    border-color: var(--primary) !important;
    background: #e8edff !important;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.2);
}
.upload-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}
.upload-icon {
    font-size: 48px;
    color: var(--primary);
    opacity: 0.8;
}
.upload-text {
    font-size: 20px;
    font-weight: 600;
    color: var(--text);
}
.upload-hint {
    font-size: 14px;
    color: var(--text-light);
}
.upload-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--primary);
    color: #fff;
    border: none;
    padding: 10px 24px;
    border-radius: 30px;
    font-weight: 500;
    font-size: 14px;
    cursor: pointer;
    transition: background 0.2s, transform 0.1s;
}
.upload-btn:hover {
    background: var(--primary-hover);
    transform: scale(1.02);
}
.upload-btn:active {
    transform: scale(0.98);
}

/* ===== File Box ===== */
.file-box {
    max-width: var(--container-max);
    margin: 0 auto 20px;
    padding: 16px 20px;
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    display: none;
}
.file-row {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}
.file-icon {
    font-size: 20px;
    color: var(--danger);
}
.file-name {
    font-size: 15px;
    font-weight: 600;
    color: var(--text);
    flex: 1;
    word-break: break-word;
}
.file-size {
    font-size: 13px;
    color: var(--text-light);
}
.file-pages {
    font-size: 13px;
    color: var(--text-light);
}
.remove-file {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 6px;
    background: var(--bg-danger);
    border: none;
    cursor: pointer;
    color: var(--danger);
    font-size: 16px;
    transition: all 0.2s ease;
    flex-shrink: 0;
}
.remove-file:hover {
    background: #fecaca;
    transform: scale(1.05);
}

/* ===== Preview + Settings Grid ===== */
.preview-settings-grid {
    display: grid;
    grid-template-columns: 1fr 350px;
    gap: 24px;
    max-width: var(--container-max);
    margin: 0 auto 20px;
}

/* ===== Preview Section ===== */
.preview-section {
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px;
    box-shadow: var(--shadow);
}

.preview-toolbar {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-bottom: 12px;
}

.btn-nav {
    width: 36px;
    height: 36px;
    border: 1px solid var(--border);
    border-radius: 50%;
    background: var(--bg-white);
    color: var(--text);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}
.btn-nav:hover {
    background: var(--bg-light);
    border-color: var(--primary);
    color: var(--primary);
}
.btn-nav:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.page-info {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 14px;
    color: var(--text);
}
.page-info input[type="number"] {
    width: 40px;
    padding: 4px 6px;
    border: 1px solid var(--border);
    border-radius: 4px;
    text-align: center;
    font-size: 14px;
}
.page-info input[type="number"]:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.15);
}
.page-separator {
    margin: 0 2px;
}

.preview-canvas-wrap {
    display: flex;
    justify-content: center;
    align-items: center;
    background: var(--bg-light);
    border-radius: var(--radius-sm);
    min-height: 400px;
    overflow: auto;
    padding: 8px;
}

.preview-canvas-wrap canvas {
    max-width: 100%;
    height: auto;
    border-radius: 4px;
    box-shadow: var(--shadow);
}

/* ===== Settings Section ===== */
.settings-section {
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow);
}

.settings-section h4 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text);
    margin: 0 0 16px 0;
    display: flex;
    align-items: center;
    gap: 8px;
}

.settings-section h4 i {
    color: var(--primary);
}

.option-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-bottom: 16px;
}

.option-label {
    font-weight: 500;
    font-size: 13px;
    color: var(--text);
}

.form-control {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 14px;
    background: var(--bg-white);
    transition: border-color 0.2s, box-shadow 0.2s;
}
.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

/* ===== Action Buttons ===== */
.action-buttons {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 16px;
}

.action-buttons .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    border: none;
    border-radius: 30px;
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s ease;
}
.action-buttons .btn:active {
    transform: scale(0.97);
}

.btn-primary {
    background: var(--primary);
    color: #fff;
}
.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.btn-secondary {
    background: var(--secondary);
    color: var(--text);
    border: 1px solid var(--border);
}
.btn-secondary:hover {
    background: var(--secondary-hover);
}
.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
    box-shadow: none !important;
}

/* ===== Progress ===== */
.progress-container {
    margin-top: 12px;
    position: relative;
    height: 6px;
    background: var(--border);
    border-radius: 30px;
    overflow: hidden;
    display: none;
}
.progress-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--primary), #4f46e5);
    border-radius: 30px;
    transition: width 0.3s ease;
}
.progress-text {
    font-size: 12px;
    color: var(--text-light);
    text-align: center;
    margin-top: 4px;
}

/* ===== Messages ===== */
.success-message,
.error-message {
    max-width: var(--container-max);
    margin: 0 auto 16px;
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    display: none;
    align-items: center;
    gap: 8px;
}
.success-message {
    background: var(--bg-success);
    color: #065f46;
    border-left: 4px solid var(--success);
    justify-content: center;
}
.error-message {
    background: var(--bg-danger);
    color: #991b1b;
    border-left: 4px solid var(--danger);
}
.success-message i {
    color: var(--success);
}

/* ===== Utilities ===== */
.hidden {
    display: none !important;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .preview-settings-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    .upload-area {
        padding: 30px 16px;
    }
    .upload-text {
        font-size: 18px;
    }
    .upload-icon {
        font-size: 36px;
    }
    .upload-btn {
        padding: 8px 18px;
        font-size: 13px;
    }
    .preview-canvas-wrap {
        min-height: 250px;
    }
    .settings-section {
        padding: 16px;
    }
    .action-buttons {
        flex-direction: row;
    }
    .action-buttons .btn {
        flex: 1;
    }
    .file-row {
        flex-direction: column;
        align-items: flex-start;
    }
}

@media (max-width: 480px) {
    .preview-canvas-wrap {
        min-height: 200px;
    }
    .action-buttons {
        flex-direction: column;
    }
    .action-buttons .btn {
        width: 100%;
    }
}