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

:root {
    --primary-color: #e67e22;
    --primary-light: #f39c12;
    --primary-dark: #d35400;
    --secondary-color: #2c3e50;
    --accent-color: #c0392b;
    --accent-light: #e74c3c;
    --golden: #f1c40f;
    --golden-dark: #d4af37;
    --text-primary: #2c3e50;
    --text-secondary: #7f8c8d;
    --text-light: #ffffff;
    --background: #ffffff;
    --background-light: #fef9f3;
    --background-warm: #fdf6e3;
    --border-color: #f4e5d3;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
    --gradient: linear-gradient(135deg, #e67e22 0%, #f39c12 50%, #f1c40f 100%);
    --gradient-warm: linear-gradient(135deg, #d35400 0%, #e67e22 50%, #f39c12 100%);
    --border-radius: 8px;
    --transition: all 0.3s ease;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--background);
}

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

/* Header & Navigation */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo {
    width: 40px;
    height: 40px;
    border-radius: 6px;
    object-fit: cover;
    transition: var(--transition);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.logo:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(230, 126, 34, 0.2);
}

.company-name {
    font-weight: 600;
    font-size: 18px;
    color: var(--text-primary);
}

.nav-links {
    display: flex;
    gap: 32px;
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width 0.3s ease;
}

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

/* Hero Section */
.hero {
    padding: 140px 0 80px;
    background: linear-gradient(135deg, var(--background-light) 0%, var(--background) 50%, var(--background-warm) 100%);
    overflow: hidden;
    position: relative;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 20% 80%, rgba(230, 126, 34, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(241, 196, 15, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(243, 156, 18, 0.05) 0%, transparent 50%);
    pointer-events: none;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-content {
    max-width: 500px;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 24px;
    color: var(--text-primary);
}

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

.hero-description {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 32px;
    line-height: 1.7;
}

.hero-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 14px 28px;
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: 600;
    font-size: 16px;
    transition: var(--transition);
    border: 2px solid transparent;
    cursor: pointer;
}

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

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

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border-color: var(--border-color);
}

.btn-secondary:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    background: rgba(230, 126, 34, 0.05);
}

.btn-full {
    width: 100%;
    justify-content: center;
}

/* Hero Visual */
.hero-visual {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    height: 400px;
    overflow: hidden;
}

.hero-watermark {
    position: absolute;
    right: calc(40px + 10vw);
    top: 50%;
    transform: translateY(-50%);
    width: 280px;
    height: 280px;
    opacity: 0.06;
    z-index: 0;
    pointer-events: none;
}

.hero-watermark img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    filter: grayscale(30%) brightness(1.2);
    border: none;
    outline: none;
}

/* Sections */
.about, .approach, .contact {
    padding: 80px 0;
}

.about {
    background: var(--background-warm);
}

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

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.section-subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* About Grid */
.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
    margin-top: 60px;
}

.about-card {
    background: white;
    padding: 40px 30px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    text-align: center;
}

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

.card-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    color: white;
}

.card-title {
    font-size: 1.4rem;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.card-description {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Approach Section */
.approach-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.approach-text {
    max-width: 500px;
}

.approach-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.7;
}

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

.tech-item {
    display: flex;
    flex-direction: column;
    padding: 20px 0;
    border-bottom: 1px solid var(--border-color);
}

.tech-item:last-child {
    border-bottom: none;
}

.tech-name {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.tech-desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Tech Grid Visual */
.approach-visual {
    display: flex;
    justify-content: center;
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    padding: 40px;
}

.tech-node {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--border-color);
    transition: var(--transition);
    position: relative;
}

.tech-node.active {
    background: var(--gradient);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.1); opacity: 0.8; }
    100% { transform: scale(1); opacity: 1; }
}

/* Contact Section */
.contact {
    background: var(--background-light);
    position: relative;
    overflow: hidden;
}

.contact::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 70% 30%, rgba(230, 126, 34, 0.05) 0%, transparent 40%);
    pointer-events: none;
}

.contact::after {
    content: '';
    position: absolute;
    left: -60px;
    bottom: -60px;
    width: 200px;
    height: 200px;
    background-image: url('imgs/watermark_clean.jpg');
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
    opacity: 0.04;
    pointer-events: none;
    z-index: 0;
    filter: grayscale(40%) brightness(1.3);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: start;
}

.contact-content-centered {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
    position: relative;
    z-index: 1;
}

.contact-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.7;
}

.contact-links {
    margin-top: 30px;
}

.contact-link {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
}

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

/* Contact Form */
.contact-form {
    background: white;
    padding: 40px;
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.form-group {
    margin-bottom: 24px;
}

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

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 16px;
    transition: var(--transition);
    font-family: inherit;
}

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

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

/* Footer */
.footer {
    background: var(--text-primary);
    color: var(--text-light);
    padding: 40px 0;
}

.footer-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 20px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.footer-logo-img {
    width: 32px;
    height: 32px;
    border-radius: 4px;
    object-fit: cover;
}

.footer-company-name {
    font-weight: 600;
    color: var(--text-light);
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .nav-container {
        padding: 0 15px;
    }
    
    .nav-links {
        display: none;
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }
    
    .hero-watermark {
        width: 220px;
        height: 220px;
        right: calc(20px + 7.5vw);
        opacity: 0.06;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-actions {
        justify-content: center;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .approach-content {
        grid-template-columns: 1fr;
        gap: 50px;
        text-align: center;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
        gap: 50px;
    }
    
    .contact-content-centered {
        text-align: center;
    }
    
    .footer-content {
        justify-content: center;
        text-align: center;
    }
    
    .container {
        padding: 0 15px;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .hero {
        padding: 120px 0 60px;
    }
    
    .hero-visual {
        height: 300px;
    }
    
    .about, .approach, .contact {
        padding: 60px 0;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-description {
        font-size: 1rem;
    }
    
    .btn {
        padding: 12px 24px;
        font-size: 14px;
    }
    
    .about-card {
        padding: 30px 20px;
    }
    
    .contact-form {
        padding: 30px 20px;
    }
    
    .tech-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
        padding: 20px;
    }
    
    .tech-node {
        width: 50px;
        height: 50px;
    }
    
    .hero-watermark {
        width: 180px;
        height: 180px;
        right: calc(10px + 5vw);
        opacity: 0.05;
    }
    
    .hero-visual {
        height: 250px;
    }
}