:root {
    --green: #22c55e;
    --green-dark: #16a34a;
    --blue: #1e90ff;
    --gray-100: #f5f5f5;
    --gray-200: #eeeeee;
    --gray-300: #e5e7eb;
    --gray-400: #d1d5db;
    --gray-500: #9ca3af;
    --text: #333333;
    --white: #ffffff;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--gray-100);
    color: var(--text);
    line-height: 1.6;
    height: 100vh;
    display: flex;
    flex-direction: column;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    width: 100%;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.app-header {
    display: flex;
    align-items: center;
    gap: 10px;
    justify-content: center;
    margin-bottom: 16px;
}
.app-title {
    font-size: 40px;
    font-weight: 800;
}
.film-icon {
    font-size: 40px;
    line-height: 1;
}

main {
    display: grid;
    grid-template-columns: 420px 1fr;
    gap: 24px;
    flex: 1;
    min-height: 0;
    padding: 16px 0;
}

.left-panel {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.card {
    background: var(--white);
    border: 1px solid var(--gray-300);
    border-radius: 8px;
    padding: 16px;
    box-shadow: 0 1px 2px rgba(0,0,0,0.04);
}

.card-title {
    font-weight: 600;
    font-size: 15px;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.card-title.with-icon::before {
    content: "🍞";
    margin-right: 6px;
}
.title-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    font-size: 18px;
    line-height: 1;
}
.icon-album { font-size: 18px; }
.icon-caption {
    font-weight: 800;
    font-size: 18px;
    color: #1e90ff;
    text-shadow: 1px 1px #ff3b3b, -1px -1px #ffcc00, 0 1px #00c853;
}
.icon-alert { color: #e53935; font-size: 18px; }

.drop-zone {
    border: 2px dashed var(--gray-300);
    border-radius: 8px;
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    align-items: center;
    justify-content: center;
    min-height: 120px;
}

.btn {
    display: inline-block;
    padding: 10px 16px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    border: none;
}

.btn-primary {
    background: var(--blue);
    color: var(--white);
    width: 100%;
}

.file-name {
    font-size: 12px;
    color: var(--gray-500);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 10px;
}
.form-row.full {
    grid-template-columns: 1fr;
}

.form-col {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

label {
    font-size: 14px;
    font-weight: 500;
    color: #555;
}

input[type="number"],
input[type="text"],
textarea {
    padding: 8px 12px;
    border: 1px solid var(--gray-300);
    border-radius: 4px;
    font-size: 14px;
    width: 100%;
}

textarea {
    resize: vertical;
    font-family: inherit;
}

.color-input-wrapper {
    display: flex;
    align-items: center;
    gap: 5px;
}

input[type="color"] {
    width: 30px;
    height: 30px;
    border: none;
    padding: 0;
    background: none;
    cursor: pointer;
}

.action-row {
    display: flex;
    gap: 12px;
}

.btn-green {
    flex: 1;
    background: var(--green);
    color: var(--white);
    padding: 12px;
}

.btn-green:hover {
    background: var(--green-dark);
}

.btn-gray {
    flex: 1;
    background: #9fb3c8;
    color: var(--white);
    padding: 12px;
}

.btn-gray:disabled {
    background: var(--gray-400);
    color: var(--white);
    cursor: not-allowed;
}

.right-panel {
    background: var(--white);
    border: 1px dashed var(--gray-300);
    border-radius: 8px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.preview-panel {
    width: 100%;
    height: 100%;
    min-height: 560px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.preview-placeholder {
    position: absolute;
    text-align: center;
    color: var(--gray-500);
}

.preview-icon {
    font-size: 32px;
    margin-bottom: 8px;
}

canvas {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    display: none; /* 显示后再切换 */
}

/* Responsive */
@media (max-width: 768px) {
    main {
        grid-template-columns: 1fr;
    }
    .preview-panel { min-height: 300px; }
}

.slider-group { display: flex; flex-direction: column; gap: 12px; }
.slider-row { display: flex; flex-direction: column; gap: 6px; }
.slider-label { font-size: 13px; color: #666; }

/* Emphasis styles */
.emphasis-label {
    display: block;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    width: 100%;
    margin-bottom: 6px;
}
.emphasis-list {
    width: 100%;
    border: 1px solid var(--gray-300);
    border-radius: 6px;
    padding: 8px 10px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}
.emphasis-list .item {
    display: flex;
    align-items: center;
    gap: 8px;
}
.emphasis-colors {
    display: flex;
    gap: 16px;
}