:root {
    /* Color Palette */
    --primary-color: #E4405F;
    --primary-dark: #C13584;
    --primary-light: #F77737;
    --secondary-color: #405DE6;
    --background: #FAFAFA;
    --surface: #FFFFFF;
    --text-primary: #262626;
    --text-secondary: #737373;
    --border-color: #DBDBDB;
    --success: #00C896;
    --warning: #FFBA08;
    
    /* Gradients */
    --gradient-instagram: linear-gradient(45deg, #F77737, #E4405F, #C13584, #405DE6);
    --gradient-soft: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.16);
    
    /* Typography */
    --font-primary: 'Noto Sans KR', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

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

body {
    font-family: var(--font-primary);
    background: var(--background);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-lg);
}

/* Header */
.header {
    text-align: center;
    padding: var(--spacing-xl) 0;
    margin-bottom: var(--spacing-xl);
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.logo i {
    font-size: 3rem;
    background: var(--gradient-instagram);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.header h1 {
    font-size: 2.5rem;
    font-weight: 900;
    background: var(--gradient-instagram);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: inline-block;
}

.subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    font-weight: 400;
}

/* Section */
.section {
    background: var(--surface);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.section:hover {
    box-shadow: var(--shadow-md);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.step-badge {
    display: inline-block;
    background: var(--gradient-instagram);
    color: white;
    padding: 0.5rem 1.5rem;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 1px;
    margin-bottom: var(--spacing-sm);
}

.section-header h2 {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.section-header p {
    color: var(--text-secondary);
    font-size: 1rem;
}

/* Input Group */
.input-group {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.input-wrapper {
    flex: 1;
    position: relative;
    display: flex;
    align-items: center;
}

.input-wrapper i {
    position: absolute;
    left: 1rem;
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.url-input {
    width: 100%;
    padding: 1rem 1rem 1rem 3rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-family: var(--font-primary);
    transition: all 0.3s ease;
}

.url-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(228, 64, 95, 0.1);
}

.url-input::placeholder {
    color: var(--text-secondary);
}

/* Buttons */
.btn {
    padding: 1rem 2rem;
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    font-family: var(--font-primary);
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    white-space: nowrap;
}

.btn-primary {
    background: var(--gradient-instagram);
    color: white;
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-large {
    width: 100%;
    padding: 1.25rem 2rem;
    font-size: 1.1rem;
    justify-content: center;
}

.btn-icon {
    background: var(--surface);
    border: 2px solid var(--border-color);
    padding: 0.5rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.3s ease;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-icon:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: scale(1.1);
}

.button-group {
    display: flex;
    gap: var(--spacing-xs);
}

/* Loading */
.loading {
    text-align: center;
    padding: var(--spacing-xl);
}

.spinner {
    width: 60px;
    height: 60px;
    margin: 0 auto var(--spacing-md);
    border: 4px solid var(--border-color);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.loading p {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.loading small {
    color: var(--text-secondary);
}

/* Result Container */
.result-container {
    margin-top: var(--spacing-xl);
}

.result-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--border-color);
}

.result-header h3 {
    font-size: 1.5rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.result-header h3 i {
    color: var(--primary-color);
}

/* Analysis Grid */
.analysis-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.analysis-card {
    background: var(--background);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    border: 2px solid var(--border-color);
    transition: all 0.3s ease;
}

.analysis-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.analysis-card h4 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--text-primary);
}

.analysis-card h4 i {
    color: var(--primary-color);
}

.content-box {
    color: var(--text-secondary);
    line-height: 1.8;
    font-size: 0.95rem;
}

.content-box p {
    margin-bottom: var(--spacing-sm);
}

.content-box ul {
    padding-left: 1.5rem;
}

.content-box li {
    margin-bottom: var(--spacing-xs);
}

.content-box strong {
    color: var(--text-primary);
    font-weight: 600;
}

/* Input Form */
.input-form {
    margin-bottom: var(--spacing-xl);
}

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-group label {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.form-group label i {
    color: var(--primary-color);
}

.text-input,
.textarea-input,
.select-input {
    width: 100%;
    padding: 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-family: var(--font-primary);
    transition: all 0.3s ease;
}

.text-input:focus,
.textarea-input:focus,
.select-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(228, 64, 95, 0.1);
}

.textarea-input {
    resize: vertical;
    min-height: 100px;
}

/* Generation Grid */
.generation-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.generation-card {
    background: var(--background);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    border: 2px solid var(--border-color);
    transition: all 0.3s ease;
}

.generation-card.highlight {
    grid-column: 1 / -1;
    background: linear-gradient(135deg, rgba(228, 64, 95, 0.05), rgba(193, 53, 132, 0.05));
    border-color: var(--primary-color);
}

.generation-card h4 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--text-primary);
}

.generation-card h4 i {
    color: var(--primary-color);
}

.script-box {
    background: var(--surface);
    padding: var(--spacing-lg);
    border-radius: var(--radius-sm);
    border-left: 4px solid var(--primary-color);
}

/* Tips Section */
.tips-section {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1), rgba(118, 75, 162, 0.1));
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
}

.tips-section h3 {
    text-align: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
}

.tips-section h3 i {
    color: var(--warning);
}

.tips-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

.tip-card {
    background: var(--surface);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    display: flex;
    gap: var(--spacing-sm);
    align-items: start;
    box-shadow: var(--shadow-sm);
}

.tip-card i {
    color: var(--success);
    font-size: 1.2rem;
    margin-top: 0.2rem;
}

.tip-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* Footer */
.footer {
    text-align: center;
    padding: var(--spacing-lg);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.footer i {
    color: var(--primary-color);
}

/* Responsive */
@media (max-width: 768px) {
    .container {
        padding: var(--spacing-sm);
    }
    
    .header h1 {
        font-size: 1.8rem;
    }
    
    .subtitle {
        font-size: 1rem;
    }
    
    .section {
        padding: var(--spacing-lg);
    }
    
    .section-header h2 {
        font-size: 1.5rem;
    }
    
    .input-group {
        flex-direction: column;
    }
    
    .analysis-grid,
    .generation-grid,
    .tips-grid {
        grid-template-columns: 1fr;
    }
    
    .generation-card.highlight {
        grid-column: 1;
    }
}

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

.section,
.result-container {
    animation: fadeIn 0.5s ease;
}

/* Utility Classes */
.hidden {
    display: none !important;
}

.text-center {
    text-align: center;
}

.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }

.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }