/* ===== CSS Variables ===== */
:root {
    --primary: #F5A623;
    --primary-dark: #E09000;
    --bg-dark: #0a0a0f;
    --bg-section: #12121a;
    --bg-card: #1a1a24;
    --text-primary: #ffffff;
    --text-secondary: #a0a0b0;
    --text-muted: #6a6a7a;
    --border-color: #2a2a3a;
    --gradient-primary: linear-gradient(135deg, #F5A623 0%, #F59E0B 100%);
    --shadow-lg: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== Reset & Base ===== */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

ul {
    list-style: none;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== Header ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 10, 15, 0.9);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
}

.nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: 16px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo img {
    height: 72px;
    width: auto;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 40px;
}

.nav-links a {
    font-size: 15px;
    font-weight: 500;
    color: var(--text-secondary);
    transition: var(--transition);
}

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

.btn-contact {
    background: var(--gradient-primary);
    padding: 10px 24px;
    border-radius: 8px;
    color: #000 !important;
    font-weight: 600;
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.mobile-menu-btn span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition);
}

/* ===== Hero Section ===== */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 120px 24px 80px;
    position: relative;
    background: radial-gradient(ellipse at 50% 0%, rgba(245, 166, 35, 0.1) 0%, transparent 50%);
}

.hero-content {
    max-width: 800px;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 24px;
}

.hero-title .highlight {
    color: #F5A623;
}

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 32px;
    line-height: 1.8;
}

.hero-subtitle strong {
    color: var(--primary);
}

.hero-badges {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 40px;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--bg-card);
    padding: 12px 20px;
    border-radius: 50px;
    font-size: 14px;
    border: 1px solid var(--border-color);
}

.badge-icon {
    color: var(--primary);
    font-weight: 600;
}

.btn-primary {
    display: inline-block;
    background: var(--gradient-primary);
    color: #000;
    font-weight: 600;
    padding: 16px 40px;
    border-radius: 12px;
    font-size: 1rem;
    transition: var(--transition);
    border: none;
    cursor: pointer;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 20px 40px rgba(245, 166, 35, 0.3);
}

.btn-large {
    padding: 20px 60px;
    font-size: 1.125rem;
}

.hero-scroll {
    position: absolute;
    bottom: 40px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--text-muted);
    font-size: 12px;
}

.scroll-indicator {
    width: 24px;
    height: 40px;
    border: 2px solid var(--border-color);
    border-radius: 12px;
    position: relative;
}

.scroll-indicator::after {
    content: '';
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background: var(--primary);
    border-radius: 2px;
    animation: scrollDown 1.5s infinite;
}

@keyframes scrollDown {

    0%,
    100% {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }

    50% {
        opacity: 0.3;
        transform: translateX(-50%) translateY(12px);
    }
}

/* ===== Section Header ===== */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    margin-bottom: 16px;
    color: #F5A623;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
}

/* ===== Portfolio Section ===== */
.portfolio {
    padding: 120px 24px;
    background: var(--bg-section);
}

.portfolio-slider-container {
    max-width: 1400px;
    margin: 0 auto;
    position: relative;
}

.portfolio-slider {
    display: flex;
    gap: 24px;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    scrollbar-width: none;
    -ms-overflow-style: none;
    padding: 20px 0;
}

.portfolio-slider::-webkit-scrollbar {
    display: none;
}

.portfolio-item {
    flex: 0 0 calc(50% - 12px);
    min-width: 320px;
    scroll-snap-align: start;
    background: var(--bg-card);
    border-radius: 20px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.portfolio-item:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary);
}

.portfolio-image {
    position: relative;
    aspect-ratio: 16/10;
    overflow: hidden;
}

.portfolio-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.portfolio-item:hover .portfolio-image img {
    transform: scale(1.05);
}

.portfolio-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
}

.portfolio-item:hover .portfolio-overlay {
    opacity: 1;
}

.portfolio-link {
    background: var(--gradient-primary);
    color: #000;
    padding: 12px 28px;
    border-radius: 8px;
    font-weight: 600;
    transform: translateY(20px);
    transition: var(--transition);
}

.portfolio-item:hover .portfolio-link {
    transform: translateY(0);
}

.portfolio-info {
    padding: 24px;
}

.portfolio-category {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    color: var(--primary);
    background: rgba(245, 166, 35, 0.1);
    padding: 4px 12px;
    border-radius: 20px;
    margin-bottom: 12px;
}

.portfolio-name {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.portfolio-desc {
    font-size: 14px;
    color: var(--text-secondary);
}

/* Slider Controls */
.slider-controls {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 24px;
    margin-top: 40px;
}

.slider-btn {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.slider-btn:hover {
    background: var(--primary);
    border-color: var(--primary);
    color: #000;
}

.slider-dots {
    display: flex;
    gap: 8px;
}

.slider-dots .dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--border-color);
    cursor: pointer;
    transition: var(--transition);
}

.slider-dots .dot.active {
    background: var(--primary);
    width: 32px;
    border-radius: 5px;
}

/* ===== Why Coding Section ===== */
.why-coding {
    padding: 120px 24px;
    background: var(--bg-dark);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 32px;
}

.feature-card {
    background: var(--bg-card);
    border-radius: 20px;
    padding: 40px;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.feature-card:hover {
    border-color: var(--primary);
    transform: translateY(-4px);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 24px;
}

.feature-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 16px;
}

.feature-card p {
    color: var(--text-secondary);
    margin-bottom: 24px;
    line-height: 1.8;
}

.feature-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.feature-list li {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 14px;
    color: var(--text-secondary);
}

.feature-list li::before {
    content: '✓';
    color: var(--primary);
    font-weight: 600;
}

/* ===== Guarantee Section ===== */
.guarantee {
    padding: 120px 24px;
    background: linear-gradient(135deg, var(--bg-section) 0%, var(--bg-dark) 100%);
}

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

.guarantee-label {
    display: inline-block;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 2px;
    color: var(--primary);
    background: rgba(245, 166, 35, 0.1);
    padding: 8px 16px;
    border-radius: 20px;
    margin-bottom: 24px;
}

.guarantee-text h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 24px;
}

.guarantee-text p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

.guarantee-badges {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.g-badge {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 32px;
    text-align: center;
    transition: var(--transition);
}

.g-badge:hover {
    border-color: var(--primary);
    transform: scale(1.02);
}

.g-badge-icon {
    font-size: 2.5rem;
    display: block;
    margin-bottom: 16px;
}

.g-badge-text {
    font-weight: 600;
    font-size: 1rem;
}

/* ===== Contact Section ===== */
.contact {
    padding: 120px 24px;
    background: var(--bg-section);
    text-align: center;
}

.contact-content h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    margin-bottom: 16px;
}

.contact-content p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.8;
}

.contact-info {
    margin-top: 32px;
    color: var(--text-secondary);
}

/* ===== Footer ===== */
.footer {
    padding: 60px 24px;
    background: var(--bg-dark);
    border-top: 1px solid var(--border-color);
}

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

.footer-logo img {
    height: 80px;
    margin: 0 auto 24px;
}

.footer-info {
    margin-bottom: 24px;
}

.footer-info p {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 8px;
}

.copyright {
    font-size: 12px;
    color: var(--text-muted);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .portfolio-item {
        flex: 0 0 calc(100% - 48px);
    }

    .guarantee-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--bg-dark);
        flex-direction: column;
        padding: 24px;
        gap: 20px;
        border-bottom: 1px solid var(--border-color);
    }

    .nav-links.active {
        display: flex;
    }

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

    .hero-subtitle br {
        display: none;
    }

    .hero-badges {
        flex-direction: column;
        align-items: center;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .guarantee-badges {
        grid-template-columns: 1fr;
    }

    .slider-controls {
        gap: 16px;
    }
}

/* ===== KakaoTalk Floating Button ===== */
.kakao-float {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 60px;
    height: 60px;
    background: #FEE500;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 20px rgba(254, 229, 0, 0.4);
    z-index: 999;
    transition: var(--transition);
}

.kakao-float:hover {
    transform: scale(1.1);
    box-shadow: 0 8px 30px rgba(254, 229, 0, 0.5);
}

.btn-kakao {
    background: #FEE500 !important;
    color: #000 !important;
    display: inline-flex;
    align-items: center;
    gap: 12px;
}

.btn-kakao:hover {
    box-shadow: 0 20px 40px rgba(254, 229, 0, 0.3);
}

@media (max-width: 768px) {
    .kakao-float {
        bottom: 20px;
        right: 20px;
        width: 54px;
        height: 54px;
    }
}

/* ===== Extra Small Mobile (320px) ===== */
@media (max-width: 375px) {
    .container {
        padding: 0 16px;
    }

    .nav {
        padding: 12px 16px;
    }

    .logo img {
        height: 44px;
    }

    .hero {
        padding: 100px 16px 60px;
    }

    .hero-title {
        font-size: 1.75rem;
    }

    .hero-subtitle {
        font-size: 0.95rem;
    }

    .badge {
        padding: 10px 14px;
        font-size: 12px;
    }

    .btn-primary {
        padding: 14px 28px;
        font-size: 0.9rem;
    }

    .btn-large {
        padding: 16px 32px;
        font-size: 1rem;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .section-subtitle {
        font-size: 1rem;
    }

    .portfolio {
        padding: 80px 16px;
    }

    .portfolio-slider {
        gap: 16px;
    }

    .portfolio-item {
        flex: 0 0 calc(100% - 24px);
        min-width: 260px;
    }

    .portfolio-info {
        padding: 16px;
    }

    .portfolio-name {
        font-size: 1.1rem;
    }

    .portfolio-desc {
        font-size: 13px;
    }

    .why-coding {
        padding: 80px 16px;
    }

    .feature-card {
        padding: 28px 20px;
    }

    .feature-icon {
        font-size: 2.5rem;
    }

    .feature-card h3 {
        font-size: 1.25rem;
    }

    .feature-card p {
        font-size: 0.9rem;
    }

    .guarantee {
        padding: 80px 16px;
    }

    .guarantee-text h2 {
        font-size: 1.5rem;
    }

    .guarantee-text p {
        font-size: 1rem;
    }

    .g-badge {
        padding: 24px 16px;
    }

    .g-badge-icon {
        font-size: 2rem;
    }

    .g-badge-text {
        font-size: 0.9rem;
    }

    .contact {
        padding: 80px 16px;
    }

    .contact-content h2 {
        font-size: 1.5rem;
    }

    .contact-content p {
        font-size: 1rem;
    }

    .btn-kakao {
        padding: 16px 24px;
        font-size: 0.95rem;
        gap: 8px;
    }

    .btn-kakao svg {
        width: 20px;
        height: 20px;
    }

    .footer {
        padding: 40px 16px;
    }

    .footer-logo img {
        height: 52px;
    }

    .footer-info p {
        font-size: 13px;
    }

    .slider-btn {
        width: 40px;
        height: 40px;
    }

    .kakao-float {
        bottom: 16px;
        right: 16px;
        width: 50px;
        height: 50px;
    }

    .kakao-float svg {
        width: 24px;
        height: 24px;
    }

    .hero-scroll {
        bottom: 24px;
    }

    .scroll-indicator {
        width: 20px;
        height: 32px;
    }
}

/* ===== Portfolio Page Styles ===== */
.portfolio-hero {
    padding: 160px 24px 80px;
    text-align: center;
    background: radial-gradient(ellipse at 50% 0%, rgba(245, 166, 35, 0.1) 0%, transparent 50%);
}

.page-title {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 700;
    color: #F5A623;
    margin-bottom: 16px;
}

.page-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
}

.portfolio-page {
    padding: 80px 24px 120px;
    background: var(--bg-section);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
    max-width: 1200px;
    margin: 0 auto;
}

.portfolio-card {
    background: var(--bg-card);
    border-radius: 20px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.portfolio-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary);
}

.portfolio-card-image {
    position: relative;
    aspect-ratio: 16/10;
    overflow: hidden;
}

.portfolio-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.portfolio-card:hover .portfolio-card-image img {
    transform: scale(1.05);
}

.portfolio-card-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
}

.portfolio-card:hover .portfolio-card-overlay {
    opacity: 1;
}

.btn-view {
    background: var(--gradient-primary);
    color: #000;
    padding: 14px 32px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1rem;
    transform: translateY(20px);
    transition: var(--transition);
}

.portfolio-card:hover .btn-view {
    transform: translateY(0);
}

.portfolio-card-info {
    padding: 28px;
}

.portfolio-card-category {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    color: var(--primary);
    background: rgba(245, 166, 35, 0.1);
    padding: 6px 14px;
    border-radius: 20px;
    margin-bottom: 16px;
}

.portfolio-card-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.portfolio-card-desc {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 20px;
}

.portfolio-card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.portfolio-card-tags li {
    font-size: 12px;
    color: var(--text-muted);
    background: var(--bg-section);
    padding: 6px 12px;
    border-radius: 20px;
    border: 1px solid var(--border-color);
}

.portfolio-cta {
    padding: 100px 24px;
    text-align: center;
    background: var(--bg-dark);
}

.portfolio-cta h2 {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 700;
    margin-bottom: 16px;
}

.portfolio-cta p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
}

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

@media (max-width: 768px) {
    .portfolio-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .portfolio-hero {
        padding: 120px 24px 60px;
    }

    .portfolio-page {
        padding: 60px 24px 80px;
    }

    .portfolio-card-info {
        padding: 20px;
    }

    .portfolio-card-title {
        font-size: 1.25rem;
    }
}

@media (max-width: 375px) {
    .portfolio-hero {
        padding: 100px 16px 40px;
    }

    .page-title {
        font-size: 1.75rem;
    }

    .page-subtitle {
        font-size: 1rem;
    }

    .portfolio-page {
        padding: 40px 16px 60px;
    }

    .portfolio-grid {
        gap: 20px;
    }

    .portfolio-card-info {
        padding: 16px;
    }

    .portfolio-card-title {
        font-size: 1.1rem;
    }

    .portfolio-card-desc {
        font-size: 14px;
    }

    .portfolio-cta {
        padding: 60px 16px;
    }

    .portfolio-cta h2 {
        font-size: 1.5rem;
    }
}