/* 
   tangledaiporn.site Styles
   Modern, responsive design with unique tri-color gradient theme
*/

:root {
    --primary-color: #FF6B6B;
    --secondary-color: #556270;
    --accent-color: #1EA896;
    --text-color: #333333;
    --light-text: #ffffff;
    --dark-text: #222222;
    --background: #f8f9fa;
    --card-bg: #ffffff;
    --section-bg: #f0f2f5;
    --gradient: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 50%, var(--accent-color) 100%);
    --shadow: 0 8px 24px rgba(85, 98, 112, 0.15);
    --border-radius: 16px;
    --container-width: 1140px;
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Poppins', sans-serif;
    color: var(--text-color);
    line-height: 1.6;
    background-color: var(--background);
}

.container {
    width: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 20px;
    color: var(--dark-text);
}

p {
    margin-bottom: 20px;
    font-size: 1.05rem;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--secondary-color);
}

img {
    max-width: 100%;
}

.gradient-text {
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-fill-color: transparent;
}

section {
    padding: 80px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: 2.5rem;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: var(--gradient);
    border-radius: 2px;
}

/* Header & Navigation */
.header {
    padding: 15px 0;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: rgba(248, 249, 250, 0.97);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

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

.logo-container {
    display: flex;
    align-items: center;
}

.logo {
    width: 40px;
    height: 40px;
    margin-right: 10px;
}

.site-title {
    font-size: 1.4rem;
    font-weight: 700;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-fill-color: transparent;
}

.nav {
    display: flex;
    align-items: center;
}

.nav-list {
    display: flex;
    list-style: none;
}

.nav-item {
    margin-left: 30px;
}

.nav-link {
    color: var(--dark-text);
    font-weight: 600;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -5px;
    width: 0;
    height: 2px;
    background: var(--gradient);
    transition: var(--transition);
}

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

.nav-link:hover::after {
    width: 100%;
}

.menu-toggle {
    display: none;
    border: none;
    background: none;
    cursor: pointer;
    font-size: 1.5rem;
    color: var(--dark-text);
}

/* Hero Section */
.hero {
    height: 100vh;
    min-height: 700px;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    background-color: var(--background);
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23556270' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.hero-content {
    z-index: 1;
}

.hero-headline {
    font-size: 3.5rem;
    line-height: 1.2;
    margin-bottom: 25px;
}

.hero-description {
    font-size: 1.2rem;
    max-width: 600px;
    margin-bottom: 30px;
    color: #666;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 60px;
}

.hero-visual {
    position: relative;
    z-index: 1;
}

/* Button Styles */
.btn {
    display: inline-block;
    padding: 16px 32px;
    border-radius: 100px;
    font-weight: 600;
    font-size: 1rem;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

.btn-primary {
    background: var(--gradient);
    color: var(--light-text);
    box-shadow: 0 10px 20px rgba(255, 107, 107, 0.25);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 30px rgba(255, 107, 107, 0.3);
    color: var(--light-text);
}

.btn-outline {
    background: transparent;
    color: var(--light-text);
    border: 2px solid var(--light-text);
}

.btn-outline:hover {
    background: var(--light-text);
    color: var(--primary-color);
}

/* Features Section */
.features {
    background-color: var(--background);
    position: relative;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 30px;
}

.feature-card {
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 40px 30px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    text-align: center;
    position: relative;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(85, 98, 112, 0.2);
}

.feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 25px;
}

.feature-title {
    font-size: 1.5rem;
    margin-bottom: 15px;
}

.feature-text {
    color: #666;
    font-size: 1rem;
}

/* Network Grid Animation */
.network-grid {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    opacity: 0.04;
}

/* How It Works */
.how-it-works {
    background-color: var(--section-bg);
    position: relative;
    overflow: hidden;
}

.steps {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
}

.step {
    width: calc(33.333% - 30px);
    text-align: center;
    background: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 40px 30px;
    box-shadow: var(--shadow);
    position: relative;
    z-index: 1;
}

.step::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: var(--gradient);
    border-radius: var(--border-radius) var(--border-radius) 0 0;
}

.step-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
    font-size: 2rem;
    color: var(--light-text);
    font-weight: 700;
}

.step-title {
    font-size: 1.5rem;
    margin-bottom: 15px;
}

/* Examples Section */
.examples {
    background: var(--gradient);
    color: var(--light-text);
    padding: 100px 0;
    position: relative;
    overflow: hidden;
}

.examples .section-title,
.examples .section-desc {
    color: var(--light-text);
}

.examples .section-title::after {
    background: var(--light-text);
}

.examples-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 50px;
}

.example-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: var(--border-radius);
    padding: 30px;
    text-align: center;
    transition: var(--transition);
}

.example-card:hover {
    transform: translateY(-10px);
    background: rgba(255, 255, 255, 0.2);
}

.example-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.example-title {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--light-text);
}

.example-text {
    color: rgba(255, 255, 255, 0.8);
}

/* CTA Section */
.cta {
    background-color: var(--background);
    text-align: center;
    padding: 100px 0;
}

.cta-content {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 60px;
    box-shadow: var(--shadow);
    max-width: 900px;
    margin: 0 auto;
    position: relative;
    overflow: hidden;
}

.cta-content::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: var(--gradient);
}

.cta-title {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.cta-desc {
    font-size: 1.2rem;
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    color: #666;
}

/* Footer */
.footer {
    background: #2c3e50;
    color: #fff;
    padding: 80px 0 20px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 60px;
    margin-bottom: 40px;
}

.footer-brand {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
}

.footer-logo {
    width: 40px;
    height: 40px;
    margin-right: 10px;
}

.footer-brand-name {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--light-text);
}

.footer-desc {
    margin-bottom: 30px;
    color: rgba(255, 255, 255, 0.7);
}

.footer-heading {
    font-size: 1.2rem;
    color: var(--light-text);
    margin-bottom: 25px;
    position: relative;
}

.footer-heading::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 40px;
    height: 2px;
    background: var(--primary-color);
}

.footer-links {
    list-style: none;
}

.footer-link-item {
    margin-bottom: 15px;
}

.footer-link {
    color: rgba(255, 255, 255, 0.7);
    transition: var(--transition);
}

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

.social-links {
    display: flex;
    gap: 15px;
    margin-top: 25px;
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: var(--light-text);
    transition: var(--transition);
}

.social-link:hover {
    background: var(--primary-color);
    color: var(--light-text);
    transform: translateY(-3px);
}

.copyright {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9rem;
}

/* Mobile Menu */
.mobile-menu {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.98);
    z-index: 2000;
    padding: 20px;
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    transition: var(--transition);
}

.mobile-menu.active {
    display: flex;
}

.close-menu {
    position: absolute;
    top: 20px;
    right: 20px;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--dark-text);
}

.mobile-nav-list {
    list-style: none;
    text-align: center;
}

.mobile-nav-item {
    margin: 20px 0;
}

.mobile-nav-link {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--dark-text);
    position: relative;
    transition: var(--transition);
    display: inline-block;
}

.mobile-nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient);
    transition: var(--transition);
}

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

.mobile-nav-link:hover::after {
    width: 100%;
}

/* Responsive Styles */
@media (max-width: 992px) {
    .hero-headline {
        font-size: 2.8rem;
    }
    
    .hero-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .hero-visual {
        grid-row: 1;
        text-align: center;
    }
    
    .step {
        width: calc(50% - 15px);
        margin-bottom: 30px;
    }
    
    .examples-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .footer-about {
        grid-column: span 2;
    }
}

@media (max-width: 768px) {
    section {
        padding: 60px 0;
    }
    
    .nav-list {
        display: none;
    }
    
    .menu-toggle {
        display: block;
    }
    
    .hero {
        min-height: 600px;
        height: auto;
        padding: 120px 0 60px;
    }
    
    .hero-headline {
        font-size: 2.4rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .step {
        width: 100%;
        margin-bottom: 20px;
    }
    
    .examples-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .cta-content {
        padding: 40px 20px;
    }
    
    .cta-title {
        font-size: 2rem;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
}

@media (max-width: 576px) {
    .hero-headline {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .cta-title {
        font-size: 1.8rem;
    }
}