* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

:root {
    --primary: #8a2be2;
    --secondary: #4a00e0;
    --accent: #ff6b6b;
    --dark: #121212;
    --darker: #0a0a0a;
    --light: #f5f5f5;
    --gray: #2d2d2d;
    --card-bg: rgba(30, 30, 40, 0.7);
    --input-bg: rgba(20, 20, 30, 0.8);
}

body {
    background: linear-gradient(135deg, var(--darker), var(--dark));
    color: var(--light);
    min-height: 100vh;
    padding: 20px;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

header {
    text-align: center;
    padding: 30px 0;
    margin-bottom: 30px;
}

.logo {
    font-size: 3.5rem;
    margin-bottom: 10px;
    color: var(--accent);
    text-shadow: 0 0 20px rgba(255, 107, 107, 0.5);
    animation: pulse 2s infinite alternate;
}

@keyframes pulse {
    0% { transform: scale(1); }
    100% { transform: scale(1.05); }
}

h1 {
    font-size: 2.8rem;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    margin-bottom: 10px;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.subtitle {
    color: #aaa;
    font-size: 1.2rem;
    max-width: 600px;
    margin: 0 auto;
}

.app-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

@media (max-width: 900px) {
    .app-container {
        grid-template-columns: 1fr;
    }
}

.card {
    background: var(--card-bg);
    border-radius: 20px;
    padding: 30px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.4);
}

.panel-title {
    font-size: 1.8rem;
    margin-bottom: 25px;
    display: flex;
    align-items: center;
    gap: 10px;
    position: relative;
    padding-bottom: 15px;
}

.panel-title:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    border-radius: 3px;
}

.panel-title i {
    color: var(--accent);
}

.form-group {
    margin-bottom: 25px;
}

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #ddd;
    display: flex;
    align-items: center;
    gap: 8px;
}

.prompt-input {
    width: 100%;
    padding: 15px;
    border-radius: 12px;
    border: 2px solid var(--gray);
    background: var(--input-bg);
    color: white;
    font-size: 1.1rem;
    transition: all 0.3s ease;
}

.prompt-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(138, 43, 226, 0.3);
}

.size-selection {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 15px;
}

@media (max-width: 480px) {
    .size-selection {
        grid-template-columns: 1fr;
    }
}

.size-option {
    text-align: center;
    padding: 15px;
    background: var(--input-bg);
    border: 2px solid var(--gray);
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.size-option:hover {
    transform: translateY(-3px);
    border-color: #555;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.size-option.active {
    background: rgba(138, 43, 226, 0.2);
    border-color: var(--primary);
    box-shadow: 0 5px 15px rgba(138, 43, 226, 0.3);
}

.size-option i {
    font-size: 2rem;
    margin-bottom: 10px;
    display: block;
    color: var(--accent);
}

.size-option .size-desc {
    font-size: 0.9rem;
    color: #aaa;
    margin-top: 5px;
}

.generate-btn {
    width: 100%;
    padding: 18px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 1.2rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 10px;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    box-shadow: 0 5px 15px rgba(138, 43, 226, 0.4);
}

.generate-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(138, 43, 226, 0.5);
}

.generate-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
    box-shadow: 0 5px 15px rgba(138, 43, 226, 0.2);
}

.image-container {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.result-image {
    width: 100%;
    background: var(--input-bg);
    border-radius: 15px;
    aspect-ratio: 1/1;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    position: relative;
    border: 2px solid var(--gray);
}

.result-image iframe {
    width: 100%;
    height: 100%;
    border: none;
}

.placeholder {
    color: #555;
    font-size: 1.2rem;
    text-align: center;
    padding: 20px;
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 10;
    background: var(--input-bg);
}

.placeholder i {
    font-size: 4rem;
    margin-bottom: 15px;
    color: var(--gray);
}

.image-actions {
    display: flex;
    gap: 15px;
    margin-top: 20px;
    justify-content: center;
}

.action-btn {
    padding: 10px 20px;
    background: rgba(138, 43, 226, 0.2);
    border: 1px solid var(--primary);
    border-radius: 8px;
    color: var(--light);
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.action-btn:hover {
    background: rgba(138, 43, 226, 0.4);
}

footer {
    text-align: center;
    padding: 40px 0 20px;
    color: #777;
    font-size: 0.9rem;
    margin-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.loading-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 20;
    display: none;
}

.loading-spinner {
    width: 60px;
    height: 60px;
    border: 5px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: var(--accent);
    animation: spin 1s ease-in-out infinite;
}

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

.loading-text {
    margin-top: 15px;
    color: #ddd;
    font-size: 1.2rem;
}

/* 响应式调整 */
@media (max-width: 768px) {
    h1 {
        font-size: 2.2rem;
    }
    .logo {
        font-size: 3rem;
    }
    .subtitle {
        font-size: 1rem;
    }
    .panel-title {
        font-size: 1.5rem;
    }
    .card {
        padding: 20px;
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 1.8rem;
    }
    .logo {
        font-size: 2.5rem;
    margin-bottom: 5px;
    animation: none;
    text-shadow: none;
}
    .image-actions {
        flex-direction: column;
    }
    .size-option {
        padding: 10px;
    }
}