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

/* CSS 변수 정의 */
:root {
    /* 색상 변수 */
    --color-primary-bg: #0a0a0a;
    --color-secondary-bg: #111;
    --color-tertiary-bg: #0d0d0d;
    --color-white: #fff;
    --color-light-gray: #e4e4e4;
    --color-gray: #ccc;
    --color-medium-gray: #999;
    --color-dark-gray: #888;
    --color-darker-gray: #666;
    --color-darkest-gray: #555;
    --color-border: #222;
    --color-border-light: #1c1c1c;
    --color-border-hover: #555;
    --color-hover-bg: #1a1a1a;

    /* 크기 변수 */
    --border-radius-small: 6px;
    --border-radius-medium: 8px;
    --border-radius-large: 12px;
    --border-radius-xl: 16px;
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 12px;
    --spacing-lg: 16px;
    --spacing-xl: 24px;
    --spacing-2xl: 32px;
    --spacing-3xl: 40px;
    --spacing-4xl: 48px;
    --spacing-5xl: 60px;
    --spacing-6xl: 80px;

    /* 패딩 표준화 */
    --padding-section: 80px 24px;
    --padding-section-mobile: 40px 16px;
    --padding-card: 24px;
    --padding-card-mobile: 20px;
    --padding-button: 8px 16px;
    --padding-button-large: 16px 40px;

    /* 테두리 표준화 */
    --border-standard: 1px solid var(--color-border);
    --border-light: 1px solid var(--color-border-light);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: var(--color-primary-bg);
    color: var(--color-light-gray);
    min-height: 100vh;
}

/* 상단 메뉴바 */
.navbar {
    background: var(--color-secondary-bg);
    border-bottom: var(--border-standard);
    position: sticky;
    top: 0;
    z-index: 100;
}

/* 언어 변경 알림창 */
.language-alert {
    background: dodgerblue;
    border-bottom: 1px solid #333;
    padding: var(--spacing-md) 0;
    display: none;
    z-index: 99;
}

.language-alert.show {
    display: block;
}

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

.language-alert-text {
    font-size: 16px;
    color: white;
    flex: 1;
    font-weight: 500;
}

.language-alert-actions {
    display: flex;
    gap: 12px;
    align-items: center;
}

.btn-language-switch {
    background: #2a2a2a;
    color: #fff;
    text-decoration: none;
    padding: 6px 12px;
    font-size: 14px;
    border-radius: 8px;
}

.btn-language-switch:hover {
    background: #3a3a3a;
    border-color: #555;
}

.btn-language-dismiss {
    background: transparent;
    border: none;
    padding: 6px 8px;
    font-size: 16px;
    cursor: pointer;
}

@media (max-width: 768px) {
    .language-alert-content {
        flex-direction: column;
        gap: 12px;
        text-align: center;
    }

    .language-alert-text {
        font-size: 13px;
    }

    .language-alert-actions {
        width: 100%;
        justify-content: center;
    }
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-xl);
}

.nav-tabs {
    display: flex;
    gap: var(--spacing-xs);
    flex: 1;
}

.nav-tab {
    background: transparent;
    color: var(--color-medium-gray);
    text-decoration: none;
    padding: var(--spacing-sm) 20px;
    font-size: 14px;
    font-weight: 500;
    border-radius: var(--border-radius-small);
    cursor: pointer;
    transition: all 0.2s;
}

.nav-tab:hover {
    color: var(--color-white);
    background: var(--color-hover-bg);
}

.nav-tab.active {
    color: var(--color-white);
    background: var(--color-hover-bg);
}

.nav-brand {
    font-size: 20px;
    font-weight: 600;
    color: var(--color-white);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

/* 공통 버튼 스타일 */
.btn-base {
    text-decoration: none;
    font-weight: 500;
    border-radius: var(--border-radius-small);
    transition: all 0.2s ease;
    cursor: pointer;
    display: inline-block;
    text-align: center;
}

/* 버튼들 */
.btn-lang {
    color: var(--color-gray);
    background: transparent;
    border: 1px solid #333;
    text-decoration: none;
    padding: var(--padding-button);
    font-size: 13px;
    font-weight: 500;
    border-radius: var(--border-radius-small);
    transition: all 0.2s ease;
}

.btn-lang:hover {
    color: var(--color-white);
    background: var(--color-hover-bg);
    border-color: var(--color-border-hover);
}

.btn-login {
    color: var(--color-gray);
    background: transparent;
    text-decoration: none;
    padding: var(--padding-button);
    font-size: 14px;
    font-weight: 500;
    border-radius: var(--border-radius-small);
    transition: all 0.2s ease;
}

.btn-login:hover {
    color: var(--color-white);
    background: var(--color-hover-bg);
}

.btn-cta {
    background: var(--color-white);
    color: #000;
    text-decoration: none;
    padding: 8px 20px;
    font-size: 14px;
    font-weight: 500;
    border-radius: var(--border-radius-small);
    transition: all 0.2s ease;
}

.btn-cta:hover {
    background: #e8e8e8;
}

.btn-hero {
    background: var(--color-white);
    color: #000;
    text-decoration: none;
    padding: var(--padding-button-large);
    font-size: 16px;
    font-weight: 600;
    border-radius: var(--border-radius-xl);
    display: inline-block;
    transition: all 0.2s ease;
}

.btn-hero:hover {
    background: #e8e8e8;
}

.btn-cta-large {
    background: var(--color-white);
    color: #000;
    text-decoration: none;
    padding: 16px 48px;
    font-size: 16px;
    font-weight: 600;
    border-radius: var(--border-radius-medium);
    display: inline-block;
    transition: all 0.2s ease;
}

.btn-cta-large:hover {
    background: #e8e8e8;
}

/* 히어로 섹션? */
.landing-main {
    min-height: calc(100vh - 70px);
}

.hero {
    max-width: 1200px;
    margin: 0 auto;
    padding: 120px var(--spacing-xl) 80px;
    text-align: center;
    position: relative;
}

.hero-gradient {
    position: absolute;
    top: -200px;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.03) 0%, transparent 70%);
    pointer-events: none;
    z-index: 0;
}

.hero-content {
    max-width: 700px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.hero h1 {
    font-size: 56px;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--spacing-xl);
    color: var(--color-white);
    letter-spacing: -0.02em;
}

.hero p {
    font-size: 20px;
    line-height: 1.6;
    color: var(--color-medium-gray);
    margin-bottom: var(--spacing-3xl);
}

.hero-actions {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

.btn-hero {
    background: #fff;
    color: #000;
    text-decoration: none;
    padding: 16px 40px;
    font-size: 16px;
    font-weight: 600;
    border-radius: 8px;
    display: inline-block;
}

.btn-hero:hover {
    background: #e8e8e8;
}

.features {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-2xl);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-3xl);
}

.feature-card {
    text-align: center;
}

.feature-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--spacing-xl);
    color: var(--color-white);
}

.feature-icon svg {
    width: 100%;
    height: 100%;
}

.feature-card h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--color-white);
}

.feature-card p {
    font-size: 15px;
    line-height: 1.6;
    color: var(--color-dark-gray);
}

/* 체험 섹션 */
.demo-section {
    max-width: 1200px;
    margin: var(--spacing-6xl) auto;
    padding: var(--spacing-2xl);
    background: var(--color-tertiary-bg);
    border-radius: var(--border-radius-xl);
    border: var(--border-light);
}

.demo-title {
    font-size: 36px;
    font-weight: 700;
    text-align: center;
    margin: var(--spacing-2xl);
    color: var(--color-white);
}

.demo-container {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.demo-input,
.demo-output {
    background: var(--color-secondary-bg);
    border: var(--border-light);
    border-radius: var(--border-radius-large);
    padding: var(--padding-card);
    height: 290px;
}

.demo-label {
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--color-darker-gray);
    margin-bottom: var(--spacing-lg);
}

.demo-textarea {
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-light-gray);
    min-height: 100px;
    font-family: inherit;
}

.typing-text {
    color: var(--color-white);
}

.cursor {
    color: var(--color-white);
    animation: blink 1s infinite;
}

@keyframes blink {
    0%,
    49% {
        opacity: 1;
    }
    50%,
    100% {
        opacity: 0;
    }
}

.demo-arrow {
    font-size: 32px;
    color: var(--color-darkest-gray);
    font-weight: 300;
}

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

.checklist-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--color-primary-bg);
    border-radius: var(--border-radius-medium);
    opacity: 0;
}

.checklist-item.fade-in {
    animation: fadeInUp 0.4s ease-out forwards;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.checklist-item input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: not-allowed;
}

.checklist-item span {
    font-size: 15px;
    color: var(--color-gray);
}

.cta-section {
    background: var(--color-secondary-bg);
    border-top: var(--border-standard);
    border-bottom: var(--border-standard);
    padding: var(--padding-section);
    margin-top: var(--spacing-3xl);
}

.cta-content {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
}

.cta-content h2 {
    font-size: 40px;
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    color: var(--color-white);
}

.cta-content p {
    font-size: 18px;
    color: var(--color-dark-gray);
    margin-bottom: var(--spacing-2xl);
}

.notify-section {
    background: var(--color-tertiary-bg);
    border: var(--border-light);
    border-radius: var(--border-radius-large);
    padding: var(--spacing-4xl) var(--spacing-xl);
    margin: var(--spacing-3xl) auto var(--spacing-6xl);
    max-width: 800px;
}

.verify-section {
    max-width: 800px;
    margin: var(--spacing-3xl) auto var(--spacing-6xl);
    padding: 0 var(--spacing-xl);
}

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

/* 배지 스타일 */
.verify-content a {
    display: inline-block;
    text-decoration: none;
    margin: 4px;
    transition: transform 0.2s ease;
}

.verify-content a:hover {
    transform: translateY(-1px);
}

.verify-content img {
    display: block;
    border-radius: 12px;
    outline: 1px solid rgb(63, 63, 70);
    outline-offset: -1px;
}

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

.notify-content h2 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--color-white);
}

.notify-content p {
    font-size: 16px;
    color: var(--color-dark-gray);
    margin-bottom: var(--spacing-2xl);
}

.notify-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    max-width: 400px;
    margin: 0 auto;
}

.notify-form input[type="email"] {
    background: var(--color-secondary-bg);
    border: 1px solid #333;
    color: var(--color-white);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--border-radius-small);
    font-size: 15px;
    width: 100%;
}

.notify-form input[type="email"]:focus {
    outline: none;
    border-color: var(--color-border-hover);
}

.notify-form input[type="email"]::placeholder {
    color: var(--color-darker-gray);
}

.notify-consent {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    text-align: left;
}

.notify-consent input[type="checkbox"] {
    margin-top: 3px;
    cursor: pointer;
}

.notify-consent label {
    font-size: 13px;
    color: var(--color-dark-gray);
    line-height: 1.5;
    cursor: pointer;
}

.notify-consent a {
    color: #aaa;
    text-decoration: underline;
}

.notify-consent a:hover {
    color: var(--color-white);
}

.notify-submit {
    background: var(--color-white);
    color: #000;
    border: none;
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 15px;
    font-weight: 600;
    border-radius: var(--border-radius-small);
    cursor: pointer;
}

.notify-submit:hover:not(:disabled) {
    background: #e8e8e8;
}

.notify-submit:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.notify-message {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-md);
    border-radius: var(--border-radius-small);
    font-size: 14px;
    text-align: center;
}

.notify-message.success {
    background: #1a3a1a;
    color: #7fd87f;
    border: 1px solid #2a5a2a;
}

.notify-message.error {
    background: #3a1a1a;
    color: #f87f7f;
    border: 1px solid #5a2a2a;
}

/* Demo Page */
.demo-page {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--padding-section);
    min-height: calc(100vh - 70px - 100px);
}

.demo-page-header {
    text-align: center;
    margin-bottom: var(--spacing-6xl);
}

.demo-page-header h1 {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    color: var(--color-white);
}

.demo-page-header p {
    font-size: 20px;
    color: var(--color-dark-gray);
}

.demo-embed-container {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
    padding: var(--spacing-5xl) var(--spacing-xl);
    background: var(--color-secondary-bg);
    border: var(--border-light);
    border-radius: var(--border-radius-large);
}

.demo-embed-container button {
    background: var(--color-white);
    color: #000;
    border: none;
    padding: 16px 48px;
    font-size: 16px;
    font-weight: 600;
    border-radius: var(--border-radius-medium);
    cursor: pointer;
}

.demo-embed-container button:hover {
    background: #e8e8e8;
}

/* Pricing Page */
.pricing-page {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--padding-section);
    min-height: calc(100vh - 70px - 100px);
}

.pricing-header {
    text-align: center;
    margin-bottom: var(--spacing-6xl);
}

.pricing-header h1 {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    color: var(--color-white);
}

.pricing-header p {
    font-size: 20px;
    color: var(--color-dark-gray);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-2xl);
    max-width: 1100px;
    margin: 0 auto;
}

.pricing-card {
    background: var(--color-secondary-bg);
    border: var(--border-light);
    border-radius: var(--border-radius-large);
    padding: var(--spacing-2xl);
    position: relative;
}

.pricing-card.featured {
    border-color: #444;
}

.pricing-badge {
    position: absolute;
    top: 16px;
    right: 16px;
    background: #1a1a1a;
    color: #fff;
    padding: 4px 12px;
    font-size: 12px;
    font-weight: 600;
    border-radius: 4px;
    border: 1px solid #333;
}

.pricing-card-header {
    margin-bottom: var(--spacing-xl);
}

.pricing-card-header h3 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    color: var(--color-white);
}

.price {
    display: flex;
    align-items: baseline;
    gap: var(--spacing-xs);
}

.price-amount {
    font-size: 40px;
    font-weight: 700;
    color: var(--color-white);
}

.price-period {
    font-size: 16px;
    color: var(--color-darker-gray);
}

.pricing-features {
    list-style: none;
    margin-bottom: var(--spacing-2xl);
}

.pricing-features li {
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid var(--color-hover-bg);
    color: var(--color-gray);
    font-size: 15px;
}

.pricing-features li:last-child {
    border-bottom: none;
}

.btn-pricing {
    display: block;
    width: 100%;
    background: #fff;
    color: #000;
    text-decoration: none;
    text-align: center;
    padding: 14px 24px;
    font-size: 16px;
    font-weight: 600;
    border-radius: 8px;
    border: none;
    cursor: pointer;
}

.btn-pricing:hover:not(:disabled) {
    background: #e8e8e8;
}

.btn-pricing:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.footer {
    background: var(--color-secondary-bg);
    padding: var(--spacing-2xl) var(--spacing-xl);
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-brand {
    font-size: 16px;
    font-weight: 600;
    color: #666;
}

.footer-right {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: var(--spacing-md);
}

.footer-text {
    font-size: 13px;
    color: #555;
}

@media (max-width: 768px) {
    .hero {
        padding: 60px var(--spacing-lg) 40px;
    }

    .hero h1 {
        font-size: 36px;
    }

    .hero p {
        font-size: 16px;
    }

    .features-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }

    .cta-content h2 {
        font-size: 28px;
    }

    .footer-container {
        flex-direction: column;
        gap: var(--spacing-lg);
        text-align: center;
    }

    .footer-right {
        align-items: center;
    }

    .btn-hero,
    .btn-cta-large {
        width: 100%;
        padding: 14px var(--spacing-xl);
        font-size: 16px;
    }

    .btn-lang {
        padding: 6px var(--spacing-md);
        font-size: 12px;
    }

    .btn-cta,
    .btn-login {
        padding: 10px var(--spacing-xl);
        font-size: 14px;
    }

    .nav-container {
        height: 60px;
        padding: 0 var(--spacing-lg);
    }

    .nav-brand {
        font-size: 18px;
    }

    .nav-actions {
        gap: var(--spacing-sm);
    }

    .features {
        padding: var(--spacing-5xl) var(--spacing-lg);
    }

    .feature-card h3 {
        font-size: 18px;
    }

    .feature-card p {
        font-size: 14px;
    }

    .cta-section {
        padding: var(--spacing-5xl) var(--spacing-lg);
    }

    .cta-content p {
        font-size: 16px;
    }

    .footer {
        padding: var(--spacing-xl) var(--spacing-lg);
    }

    .demo-section {
        margin: var(--spacing-3xl) auto;
        padding: var(--spacing-5xl) var(--spacing-lg);
    }

    .demo-title {
        font-size: 28px;
        margin-bottom: var(--spacing-3xl);
    }

    .demo-container {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }

    .demo-arrow {
        text-align: center;
        transform: rotate(90deg);
        font-size: 24px;
    }

    .demo-input,
    .demo-output {
        padding: var(--spacing-xl);
    }

    .hero-gradient {
        width: 400px;
        height: 400px;
        top: -100px;
    }

    .nav-tabs {
        display: none;
    }

    .demo-page,
    .pricing-page {
        padding: var(--spacing-5xl) var(--spacing-lg);
    }

    .demo-page-header h1,
    .pricing-header h1 {
        font-size: 32px;
    }

    .demo-page-header p,
    .pricing-header p {
        font-size: 16px;
    }

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