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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    min-height: 100vh;
    color: #2c3e50;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo {
    font-size: 1.8rem;
    font-weight: 700;
    color: #3498db;
    text-decoration: none;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    text-decoration: none;
    color: #2c3e50;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-links a:hover {
    color: #3498db;
}

/* Main Content */
.main {
    padding: 3rem 0;
}

.hero {
    text-align: center;
    margin-bottom: 3rem;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: #2c3e50;
}

.hero p {
    font-size: 1.2rem;
    color: #7f8c8d;
    max-width: 600px;
    margin: 0 auto;
}

/* Upload Section */
.upload-section {
    background: white;
    border-radius: 20px;
    padding: 2rem;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    margin-bottom: 2rem;
}

.upload-area {
    border: 3px dashed #bdc3c7;
    border-radius: 15px;
    padding: 3rem 2rem;
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.upload-area:hover,
.upload-area.dragover {
    border-color: #3498db;
    background: rgba(52, 152, 219, 0.05);
    transform: translateY(-2px);
}

.upload-icon {
    font-size: 3rem;
    color: #bdc3c7;
    margin-bottom: 1rem;
    transition: color 0.3s ease;
}

.upload-area:hover .upload-icon {
    color: #3498db;
}

.upload-text {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    color: #2c3e50;
}

.upload-hint {
    color: #7f8c8d;
    font-size: 0.9rem;
}

.file-input {
    display: none;
}

.upload-btn {
    background: linear-gradient(135deg, #3498db, #2980b9);
    color: white;
    border: none;
    padding: 12px 30px;
    border-radius: 25px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 1rem;
}

.upload-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(52, 152, 219, 0.4);
}

/* Rules Section */
.rules-section {
    background: white;
    border-radius: 20px;
    padding: 2rem;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    margin-bottom: 2rem;
}

.rules-title {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: #2c3e50;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.rules-list {
    list-style: none;
}

.rules-list li {
    padding: 0.8rem 0;
    border-bottom: 1px solid #ecf0f1;
    display: flex;
    align-items: flex-start;
    gap: 0.8rem;
}

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

.rule-icon {
    color: #e74c3c;
    font-size: 1.2rem;
    margin-top: 0.1rem;
}

.rule-icon.info {
    color: #3498db;
}

.rule-icon.success {
    color: #27ae60;
}

/* Progress Bar */
.progress-container {
    display: none;
    margin-top: 1rem;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: #ecf0f1;
    border-radius: 4px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #3498db, #2980b9);
    width: 0%;
    transition: width 0.3s ease;
}

.progress-text {
    text-align: center;
    margin-top: 0.5rem;
    color: #7f8c8d;
    font-size: 0.9rem;
}

/* Result Section */
.result-section {
    display: none;
    background: white;
    border-radius: 20px;
    padding: 2rem;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    margin-bottom: 2rem;
}

.result-image {
    max-width: 100%;
    border-radius: 10px;
    margin-bottom: 1rem;
}

.result-links {
    display: grid;
    gap: 1rem;
}

.link-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: #f8f9fa;
    border-radius: 10px;
}

.link-label {
    font-weight: 600;
    color: #2c3e50;
    min-width: 80px;
}

.link-input {
    flex: 1;
    padding: 0.5rem;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-family: monospace;
    font-size: 0.9rem;
}

.copy-btn {
    background: #27ae60;
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 5px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: background 0.3s ease;
}

.copy-btn:hover {
    background: #219a52;
}

/* Footer */
.footer {
    background: rgba(255, 255, 255, 0.95);
    padding: 2rem 0;
    text-align: center;
    color: #7f8c8d;
    margin-top: 3rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .hero p {
        font-size: 1rem;
    }

    .upload-section,
    .rules-section,
    .result-section {
        padding: 1.5rem;
        margin: 0 10px 2rem;
    }

    .upload-area {
        padding: 2rem 1rem;
    }

    .link-item {
        flex-direction: column;
        align-items: stretch;
    }

    .link-label {
        min-width: auto;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 10px;
    }

    .upload-area {
        padding: 1.5rem 1rem;
    }

    .upload-icon {
        font-size: 2rem;
    }

    .upload-text {
        font-size: 1rem;
    }
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.5s ease;
}

/* Alert Styles */
.alert {
    padding: 1rem;
    border-radius: 10px;
    margin: 1rem 0;
    display: none;
}

.alert.error {
    background: #fee;
    border: 1px solid #fcc;
    color: #c33;
}

.alert.success {
    background: #efe;
    border: 1px solid #cfc;
    color: #363;
}

.alert.show {
    display: block;
    animation: fadeIn 0.3s ease;
}