/* ===================================
   FLONEX Co., Ltd. - Main Stylesheet
   Brand Colors: Deep Blue (#003366), Emerald (#00A6A6)
   =================================== */

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

:root {
    /* Brand Colors */
    --primary-blue: #003366;
    --emerald: #00A6A6;
    --light-blue: #0055aa;
    --dark-blue: #001a33;
    
    /* Neutral Colors */
    --white: #ffffff;
    --light-gray: #f5f7fa;
    --gray: #e0e4e8;
    --dark-gray: #333333;
    --text-dark: #1a1a1a;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--primary-blue) 0%, var(--light-blue) 100%);
    --gradient-accent: linear-gradient(135deg, var(--emerald) 0%, #00d4d4 100%);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* Typography */
    --font-primary: 'Montserrat', sans-serif;
    --font-korean: 'Noto Sans KR', sans-serif;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-korean);
    color: var(--text-dark);
    line-height: 1.7;
    overflow-x: hidden;
    background-color: var(--white);
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-primary);
    font-weight: 700;
    line-height: 1.2;
}

/* Language Selector */
.language-selector {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
    display: flex;
    gap: 0.5rem;
    background: rgba(255, 255, 255, 0.95);
    padding: 0.5rem;
    border-radius: 50px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.lang-btn {
    background: transparent;
    border: 2px solid transparent;
    padding: 0.5rem 1rem;
    border-radius: 30px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 600;
    font-family: var(--font-primary);
    transition: all var(--transition-normal);
    color: var(--dark-gray);
}

.lang-btn:hover {
    background: var(--light-gray);
    transform: translateY(-2px);
}

.lang-btn.active {
    background: var(--gradient-primary);
    color: var(--white);
    border-color: var(--primary-blue);
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 999;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0, 51, 102, 0.1);
    transition: all var(--transition-normal);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem var(--spacing-md);
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    font-family: var(--font-primary);
}

.logo-symbol {
    font-size: 2rem;
    font-weight: 800;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    transform: rotate(90deg);
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary-blue);
    letter-spacing: 1px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav-menu a {
    text-decoration: none;
    color: var(--dark-gray);
    font-weight: 600;
    font-size: 0.95rem;
    position: relative;
    transition: color var(--transition-normal);
}

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

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

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

.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.mobile-toggle span {
    width: 25px;
    height: 3px;
    background: var(--primary-blue);
    border-radius: 3px;
    transition: all var(--transition-normal);
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    color: var(--white);
    overflow: hidden;
    padding-top: 80px;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
}

.wave-animation {
    position: absolute;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(0, 166, 166, 0.15) 0%, transparent 70%);
    animation: wave-flow 20s infinite linear;
}

.wave-2 {
    animation-duration: 25s;
    animation-delay: -5s;
    opacity: 0.7;
}

.wave-3 {
    animation-duration: 30s;
    animation-delay: -10s;
    opacity: 0.5;
}

@keyframes wave-flow {
    0% {
        transform: translate(-50%, -50%) rotate(0deg);
    }
    100% {
        transform: translate(-50%, -50%) rotate(360deg);
    }
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    animation: fadeInUp 1s ease;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-logo {
    margin-bottom: var(--spacing-md);
}

.flow-symbol {
    font-size: 5rem;
    font-weight: 800;
    margin-bottom: 1rem;
    transform: rotate(90deg);
    display: inline-block;
    background: linear-gradient(135deg, var(--white) 0%, var(--emerald) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% {
        transform: rotate(90deg) translateY(0);
    }
    50% {
        transform: rotate(90deg) translateY(-10px);
    }
}

.company-name {
    font-size: 4rem;
    font-weight: 800;
    letter-spacing: 3px;
    margin-bottom: 0.5rem;
}

.company-subtitle {
    font-size: 1.2rem;
    font-weight: 400;
    letter-spacing: 4px;
    opacity: 0.9;
}

.hero-slogan {
    font-size: 2.5rem;
    font-weight: 700;
    margin: var(--spacing-md) 0 var(--spacing-sm);
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.hero-description {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.95;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.hero-cta {
    margin-top: var(--spacing-md);
}

.btn {
    display: inline-block;
    padding: 1rem 2.5rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-family: var(--font-primary);
    transition: all var(--transition-normal);
    border: 2px solid transparent;
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary {
    background: var(--white);
    color: var(--primary-blue);
}

.btn-primary:hover {
    background: transparent;
    border-color: var(--white);
    color: var(--white);
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    width: 30px;
    height: 50px;
    border: 2px solid var(--white);
    border-radius: 25px;
    display: flex;
    justify-content: center;
    padding-top: 10px;
    opacity: 0.7;
}

.scroll-indicator span {
    width: 6px;
    height: 10px;
    background: var(--white);
    border-radius: 3px;
    animation: scroll 2s infinite;
}

@keyframes scroll {
    0% {
        transform: translateY(0);
        opacity: 1;
    }
    100% {
        transform: translateY(20px);
        opacity: 0;
    }
}

/* Section Styles */
section {
    padding: var(--spacing-xl) 0;
}

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

.section-title {
    font-size: 2.5rem;
    color: var(--primary-blue);
    margin-bottom: 1rem;
    position: relative;
    display: inline-block;
}

.title-underline {
    width: 80px;
    height: 4px;
    background: var(--gradient-accent);
    margin: 0 auto 1.5rem;
    border-radius: 2px;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--dark-gray);
    opacity: 0.8;
}

/* About Section */
.about {
    background: var(--light-gray);
}

.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-lg);
    align-items: start;
}

.about-story {
    font-size: 1.1rem;
    line-height: 1.8;
}

.about-story p {
    margin-bottom: 1.5rem;
}

.lead-text {
    font-size: 1.2rem;
    font-weight: 500;
}

.highlight {
    padding: var(--spacing-md);
    background: var(--white);
    border-left: 4px solid var(--emerald);
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

.about-philosophy {
    position: sticky;
    top: 100px;
}

.philosophy-card {
    background: var(--white);
    padding: var(--spacing-md);
    border-radius: 16px;
    text-align: center;
    box-shadow: 0 10px 40px rgba(0, 51, 102, 0.1);
    transition: transform var(--transition-normal);
}

.philosophy-card:hover {
    transform: translateY(-10px);
}

.philosophy-card i {
    font-size: 3rem;
    color: var(--emerald);
    margin-bottom: 1rem;
}

.philosophy-card h3 {
    color: var(--primary-blue);
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.philosophy-card p {
    color: var(--dark-gray);
    line-height: 1.6;
}

/* Business Section */
.business {
    background: var(--white);
}

.business-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.business-card {
    background: var(--white);
    padding: var(--spacing-md);
    border-radius: 16px;
    text-align: center;
    box-shadow: 0 5px 30px rgba(0, 0, 0, 0.08);
    transition: all var(--transition-normal);
    border: 2px solid transparent;
}

.business-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 50px rgba(0, 166, 166, 0.2);
    border-color: var(--emerald);
}

.business-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    background: var(--gradient-accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--white);
    transition: transform var(--transition-normal);
}

.business-card:hover .business-icon {
    transform: rotateY(360deg);
}

.business-card h3 {
    color: var(--primary-blue);
    font-size: 1.3rem;
    margin-bottom: 1rem;
}

.business-card p {
    color: var(--dark-gray);
    line-height: 1.6;
}

/* Values Section */
.values {
    background: var(--gradient-primary);
    color: var(--white);
}

.values .section-title {
    color: var(--white);
}

.values .section-subtitle {
    color: rgba(255, 255, 255, 0.9);
}

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

.value-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: var(--spacing-md);
    border-radius: 16px;
    text-align: center;
    border: 2px solid rgba(255, 255, 255, 0.2);
    transition: all var(--transition-normal);
}

.value-card:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-10px);
    border-color: var(--emerald);
}

.value-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto 1.5rem;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
}

.value-card h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
}

.value-card p {
    opacity: 0.95;
    line-height: 1.6;
}

.values-emphasis {
    margin-top: var(--spacing-lg);
}

.emphasis-box {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: 16px;
    text-align: center;
    border: 2px solid rgba(255, 255, 255, 0.3);
    max-width: 800px;
    margin: 0 auto;
}

.emphasis-box i {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: var(--emerald);
}

.emphasis-box h3 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
}

.emphasis-box p {
    font-size: 1.2rem;
    opacity: 0.95;
}

/* Contact Section */
.contact {
    background: var(--light-gray);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.contact-item {
    display: flex;
    gap: 1.5rem;
    align-items: start;
    padding: var(--spacing-md);
    background: var(--white);
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
    transition: transform var(--transition-normal);
}

.contact-item:hover {
    transform: translateX(10px);
}

.contact-item i {
    font-size: 1.8rem;
    color: var(--emerald);
    margin-top: 0.2rem;
}

.contact-item h4 {
    color: var(--primary-blue);
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.contact-item p {
    color: var(--dark-gray);
}

.contact-form-wrapper {
    background: var(--white);
    padding: var(--spacing-md);
    border-radius: 16px;
    box-shadow: 0 10px 40px rgba(0, 51, 102, 0.1);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    position: relative;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    border: 2px solid var(--gray);
    border-radius: 8px;
    font-size: 1rem;
    font-family: var(--font-korean);
    transition: all var(--transition-normal);
    background: var(--white);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--emerald);
}

.form-group label {
    position: absolute;
    left: 1rem;
    top: 1rem;
    color: var(--dark-gray);
    pointer-events: none;
    transition: all var(--transition-normal);
    background: var(--white);
    padding: 0 0.5rem;
}

.form-group input:focus + label,
.form-group input:not(:placeholder-shown) + label,
.form-group textarea:focus + label,
.form-group textarea:not(:placeholder-shown) + label {
    top: -0.7rem;
    left: 0.7rem;
    font-size: 0.85rem;
    color: var(--emerald);
}

.contact-form button {
    background: var(--gradient-primary);
    color: var(--white);
    border: none;
    padding: 1rem 2rem;
    font-size: 1rem;
    border-radius: 50px;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.contact-form button:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 51, 102, 0.3);
}

/* Footer */
.footer {
    background: var(--dark-blue);
    color: var(--white);
    padding: var(--spacing-lg) 0 var(--spacing-md);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.footer-logo .logo-symbol {
    font-size: 2rem;
}

.footer-logo .logo-text {
    font-size: 1.5rem;
    color: var(--white);
}

.footer-slogan {
    font-style: italic;
    opacity: 0.8;
    font-family: var(--font-primary);
}

.footer-info {
    text-align: right;
}

.footer-info p {
    margin-bottom: 0.5rem;
    opacity: 0.8;
}

/* Responsive Design */
@media (max-width: 968px) {
    .nav-menu {
        position: fixed;
        top: 80px;
        left: -100%;
        flex-direction: column;
        background: var(--white);
        width: 100%;
        padding: var(--spacing-md);
        box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
        transition: left var(--transition-normal);
        align-items: flex-start;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .mobile-toggle {
        display: flex;
    }
    
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .about-philosophy {
        position: static;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-info {
        text-align: center;
    }
}

@media (max-width: 768px) {
    html {
        font-size: 14px;
    }
    
    .company-name {
        font-size: 3rem;
    }
    
    .hero-slogan {
        font-size: 1.8rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .language-selector {
        top: 10px;
        right: 10px;
        flex-direction: column;
    }
    
    .business-grid {
        grid-template-columns: 1fr;
    }
    
    .values-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .flow-symbol {
        font-size: 3rem;
    }
    
    .company-name {
        font-size: 2rem;
    }
    
    .company-subtitle {
        font-size: 1rem;
    }
    
    .hero-slogan {
        font-size: 1.5rem;
    }
    
    .hero-description {
        font-size: 1rem;
    }
}

/* Animation on scroll */
[data-aos] {
    opacity: 0;
    transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-aos].aos-animate {
    opacity: 1;
}

[data-aos="fade-up"] {
    transform: translateY(50px);
}

[data-aos="fade-up"].aos-animate {
    transform: translateY(0);
}

[data-aos="zoom-in"] {
    transform: scale(0.8);
}

[data-aos="zoom-in"].aos-animate {
    transform: scale(1);
}