/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #4A90E2;
    --primary-dark: #357ABD;
    --secondary-color: #6C5CE7;
    --text-color: #333333;
    --text-light: #666666;
    --bg-light: #F8F9FA;
    --bg-white: #FFFFFF;
    --border-color: #E1E5E9;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.15);
    --radius: 12px;
    --radius-sm: 8px;
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans SC', 'Poppins', -apple-system, BlinkMacSystemFont, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-light);
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.header {
    background: var(--bg-white);
    box-shadow: var(--shadow);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.logo i {
    font-size: 1.8rem;
}

.nav {
    display: flex;
    gap: 30px;
}

.nav a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    transition: var(--transition);
}

.nav a:hover {
    color: var(--primary-color);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(74, 144, 226, 0.4);
}

.btn-secondary {
    background: var(--bg-light);
    color: var(--text-color);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--border-color);
}

.btn-outline {
    background: transparent;
    color: var(--text-color);
    border: 1px solid var(--border-color);
}

.btn-outline:hover {
    background: var(--bg-light);
}

/* Hero Section */
.hero {
    padding: 150px 0 80px;
    text-align: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    font-weight: 700;
}

.hero p {
    font-size: 1.25rem;
    margin-bottom: 30px;
    opacity: 0.9;
}

.hero .btn-primary {
    background: white;
    color: var(--secondary-color);
    font-size: 1.1rem;
    padding: 15px 35px;
}

.hero .btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

/* Features Section */
.features {
    padding: 80px 0;
    background: var(--bg-white);
}

.features h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 50px;
    color: var(--text-color);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.feature-card {
    text-align: center;
    padding: 40px 30px;
    background: var(--bg-light);
    border-radius: var(--radius);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.feature-card i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: 15px;
}

.feature-card p {
    color: var(--text-light);
}

/* Generator Section */
.generator {
    padding: 80px 0;
    background: var(--bg-light);
}

.generator h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 50px;
}

.generator-layout {
    display: grid;
    grid-template-columns: 400px 1fr;
    gap: 30px;
    align-items: start;
}

/* Control Panel */
.control-panel {
    background: var(--bg-white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    max-height: 800px;
    overflow-y: auto;
}

.panel-section {
    padding: 25px;
    border-bottom: 1px solid var(--border-color);
}

.panel-section:last-child {
    border-bottom: none;
}

.panel-section h3 {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.1rem;
    margin-bottom: 20px;
    color: var(--text-color);
}

.panel-section h3 i {
    color: var(--primary-color);
}

.form-group {
    margin-bottom: 20px;
}

.form-group:last-child {
    margin-bottom: 0;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    font-size: 0.9rem;
    color: var(--text-light);
}

.form-group input[type="text"],
.form-group select {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input[type="text"]:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.1);
}

.form-group input[type="range"] {
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: var(--border-color);
    appearance: none;
    cursor: pointer;
}

.form-group input[type="range"]::-webkit-slider-thumb {
    appearance: none;
    width: 18px;
    height: 18px;
    background: var(--primary-color);
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition);
}

.form-group input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.1);
}

/* Color Input */
.color-input-wrapper {
    display: flex;
    gap: 10px;
    align-items: center;
}

.color-input-wrapper input[type="color"] {
    width: 50px;
    height: 40px;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    padding: 0;
}

.hex-input {
    flex: 1;
    padding: 10px 12px !important;
    font-family: monospace;
    text-transform: uppercase;
}

/* Color Presets */
.color-presets {
    margin-top: 15px;
}

.preset-label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-light);
    margin-bottom: 10px;
}

.preset-colors {
    display: flex;
    gap: 10px;
}

.color-preset {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 3px solid var(--bg-white);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
    cursor: pointer;
    transition: var(--transition);
}

.color-preset:nth-child(1) { background: linear-gradient(135deg, #4A90E2, #333); }
.color-preset:nth-child(2) { background: linear-gradient(135deg, #FF6B6B, #2C3E50); }
.color-preset:nth-child(3) { background: linear-gradient(135deg, #00B894, #2D3436); }
.color-preset:nth-child(4) { background: linear-gradient(135deg, #FDCB6E, #6C5CE7); }
.color-preset:nth-child(5) { background: linear-gradient(135deg, #E17055, #FFEAA7); }

.color-preset:hover {
    transform: scale(1.15);
}

/* Icon Grid */
.icon-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 8px;
    max-height: 200px;
    overflow-y: auto;
    padding: 5px;
}

.icon-item {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 45px;
    height: 45px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    font-size: 1.2rem;
    color: var(--text-light);
}

.icon-item:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    background: rgba(74, 144, 226, 0.1);
}

.icon-item.active {
    border-color: var(--primary-color);
    background: var(--primary-color);
    color: white;
}

/* Preview Panel */
.preview-panel {
    background: var(--bg-white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 30px;
    position: sticky;
    top: 90px;
}

.preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
}

.preview-header h3 {
    font-size: 1.2rem;
}

.preview-container {
    background: repeating-conic-gradient(#f0f0f0 0% 25%, transparent 0% 50%) 50% / 20px 20px;
    border-radius: var(--radius);
    padding: 40px;
    min-height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 30px;
}

.preview-box {
    background: white;
    padding: 40px;
    border-radius: 0;
    display: inline-block;
    transition: var(--transition);
}

.logo-content {
    display: flex;
    align-items: center;
    gap: 16px;
}

.logo-content.layout-top {
    flex-direction: column;
    text-align: center;
}

.logo-content.layout-right {
    flex-direction: row-reverse;
}

.logo-icon {
    font-size: 48px;
    color: var(--primary-color);
    transition: var(--transition);
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.brand-name {
    font-size: 48px;
    font-weight: 400;
    line-height: 1.2;
    transition: var(--transition);
}

.slogan {
    font-size: 14px;
    color: var(--text-light);
    margin-top: 5px;
    transition: var(--transition);
}

/* Download Section */
.download-section {
    border-top: 1px solid var(--border-color);
    padding-top: 25px;
}

.download-section h4 {
    margin-bottom: 15px;
    font-size: 1rem;
}

.download-options {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.download-options .btn {
    flex: 1;
    justify-content: center;
    min-width: 150px;
}

/* Templates Section */
.templates {
    padding: 80px 0;
    background: var(--bg-white);
}

.templates h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 15px;
}

.section-desc {
    text-align: center;
    color: var(--text-light);
    margin-bottom: 40px;
}

.templates-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
}

.template-card {
    background: var(--bg-light);
    border-radius: var(--radius);
    padding: 30px;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
}

.template-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.template-preview {
    height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 15px;
    border-radius: var(--radius-sm);
}

.template-name {
    text-align: center;
    font-weight: 600;
    color: var(--text-color);
}

/* Footer */
.footer {
    background: #2C3E50;
    color: white;
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-brand .logo {
    color: white;
    margin-bottom: 15px;
}

.footer-brand p {
    opacity: 0.7;
}

.footer-links h4 {
    margin-bottom: 20px;
    font-size: 1.1rem;
}

.footer-links a {
    display: block;
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    margin-bottom: 10px;
    transition: var(--transition);
}

.footer-links a:hover {
    color: white;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    opacity: 0.7;
    font-size: 0.9rem;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .generator-layout {
        grid-template-columns: 1fr;
    }

    .control-panel {
        max-height: none;
    }

    .preview-panel {
        position: relative;
        top: 0;
    }
}

@media (max-width: 768px) {
    .header .container {
        flex-direction: column;
        height: auto;
        padding: 15px 20px;
        gap: 15px;
    }

    .nav {
        gap: 20px;
    }

    .hero {
        padding: 130px 0 60px;
    }

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

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

    .features h2,
    .generator h2,
    .templates h2 {
        font-size: 1.8rem;
    }

    .icon-grid {
        grid-template-columns: repeat(5, 1fr);
    }

    .download-options {
        flex-direction: column;
    }

    .download-options .btn {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .icon-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .preview-container {
        padding: 20px;
    }

    .preview-box {
        padding: 20px;
    }
}

/* Scrollbar Styling */
.control-panel::-webkit-scrollbar,
.icon-grid::-webkit-scrollbar {
    width: 6px;
}

.control-panel::-webkit-scrollbar-track,
.icon-grid::-webkit-scrollbar-track {
    background: var(--bg-light);
}

.control-panel::-webkit-scrollbar-thumb,
.icon-grid::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
}

.control-panel::-webkit-scrollbar-thumb:hover,
.icon-grid::-webkit-scrollbar-thumb:hover {
    background: var(--text-light);
}

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

.feature-card,
.template-card {
    animation: fadeIn 0.5s ease forwards;
}

.feature-card:nth-child(1) { animation-delay: 0.1s; }
.feature-card:nth-child(2) { animation-delay: 0.2s; }
.feature-card:nth-child(3) { animation-delay: 0.3s; }
.feature-card:nth-child(4) { animation-delay: 0.4s; }