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

:root {
    --black: #000000;
    --white: #FFFFFF;
    --coral-a: #E58168;
    --coral-b: #E9927C;
    --gray: #666666;
    --light-gray: #f7f7f7;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    color: var(--black);
    background: var(--white);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Header */
header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 24px 48px;
    background: transparent;
    transition: all 0.3s ease;
}

header.scrolled {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    padding: 16px 48px;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1400px;
    margin: 0 auto;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    transition: transform 0.3s ease;
}

.logo:hover {
    transform: scale(1.05);
}

.logo-icon {
    width: 62px;
    height: 62px;
    transition: all 0.3s ease;
    filter: brightness(0) saturate(100%) invert(60%) sepia(25%) saturate(1000%) hue-rotate(330deg) brightness(95%) contrast(85%);
}

.logo:hover .logo-icon {
    transform: rotate(5deg) scale(1.1);
    filter: brightness(0) saturate(100%) invert(70%) sepia(35%) saturate(1200%) hue-rotate(325deg) brightness(100%) contrast(90%);
}

.logo-text {
    font-size: 24px;
    font-weight: 900;
    letter-spacing: -0.5px;
    background: linear-gradient(135deg, var(--coral-a), var(--coral-b));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-fill-color: transparent;
}

.nav-links {
    display: flex;
    gap: 40px;
    list-style: none;
}

.nav-links a {
    text-decoration: none;
    color: var(--black);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    position: relative;
    transition: all 0.3s ease;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--coral-a);
    transition: width 0.3s ease;
}

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

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 120px 48px 80px;
    background: radial-gradient(ellipse at center top, rgba(229, 129, 104, 0.15) 0%, rgba(233, 146, 124, 0.08) 25%, rgba(255, 255, 255, 0) 60%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(233, 146, 124, 0.1) 0%, transparent 70%);
    animation: float 20s ease-in-out infinite;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(229, 129, 104, 0.08) 0%, transparent 70%);
    animation: float 25s ease-in-out infinite reverse;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    33% { transform: translate(30px, -30px) rotate(120deg); }
    66% { transform: translate(-20px, 20px) rotate(240deg); }
}

.hero-content {
    max-width: 1200px;
    text-align: center;
    position: relative;
    z-index: 1;
    animation: fadeInUp 1s ease-out;
}

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

.hero h1 {
    font-size: 86px;
    line-height: 100px;
    font-weight: 900;
    letter-spacing: -2px;
    margin-bottom: 32px;
    background: linear-gradient(135deg, var(--black) 0%, var(--black) 50%, var(--coral-a) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-fill-color: transparent;
    animation: gradientShift 8s ease infinite;
    background-size: 200% auto;
}

@keyframes gradientShift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.hero .subtitle {
    font-size: 20px;
    line-height: 32px;
    color: var(--gray);
    max-width: 800px;
    margin: 0 auto 48px;
    font-weight: 400;
    animation: fadeInUp 1s ease-out 0.2s both;
}

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 20px 40px;
    background: var(--black);
    color: var(--white);
    text-decoration: none;
    font-size: 16px;
    font-weight: 600;
    letter-spacing: 0.5px;
    border-radius: 100px;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    position: relative;
    overflow: hidden;
    animation: fadeInUp 1s ease-out 0.4s both;
}

.cta-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.6s ease;
}

.cta-button:hover {
    transform: translateY(-2px) scale(1.05);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    background: var(--coral-a);
}

.cta-button:hover::before {
    left: 100%;
}

.cta-button span {
    transition: transform 0.3s ease;
    display: inline-block;
}

.cta-button:hover span {
    transform: translateX(4px);
}

/* Thesis Section */
.thesis {
    padding: 100px 48px;
    background: linear-gradient(180deg, var(--black) 0%, #0a0a0a 100%);
    position: relative;
    overflow: hidden;
}

.thesis::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 1px;
    height: 60px;
    background: linear-gradient(180deg, transparent, var(--coral-a));
}

.thesis-content {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.thesis-text {
    position: relative;
    padding: 60px;
    background: rgba(255, 255, 255, 0.02);
    border-radius: 20px;
    border: 1px solid rgba(229, 129, 104, 0.2);
    backdrop-filter: blur(10px);
}

.thesis-line {
    font-size: 24px;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 32px;
    font-weight: 300;
    letter-spacing: 0.3px;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.8s ease-out;
}

.thesis-text.visible .thesis-line {
    opacity: 1;
    transform: translateY(0);
}

.thesis-text.visible .thesis-line:nth-child(1) {
    transition-delay: 0s;
}

.thesis-text.visible .thesis-line:nth-child(2) {
    transition-delay: 0.2s;
}

.thesis-text.visible .thesis-line:nth-child(3) {
    transition-delay: 0.4s;
}

.thesis-line.emphasis {
    color: var(--white);
    font-weight: 400;
    font-style: italic;
    margin-bottom: 0;
    background: linear-gradient(90deg, var(--coral-a), var(--coral-b), var(--coral-a));
    background-size: 200% auto;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradientShift 8s ease infinite;
}

/* Features Section */
.features {
    padding: 120px 48px;
    background: var(--white);
}

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

.section-header {
    text-align: center;
    margin-bottom: 80px;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.8s ease-out forwards;
}

.section-header.visible {
    animation: fadeInUp 0.8s ease-out forwards;
}

.section-header h2 {
    font-size: 48px;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 40px;
    letter-spacing: -1px;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
    background: linear-gradient(135deg, var(--black) 0%, var(--coral-a) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-fill-color: transparent;
    animation: gradientShift 8s ease infinite;
    background-size: 200% auto;
    position: relative;
    padding-bottom: 30px;
}

.section-header h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 4px;
    background: linear-gradient(90deg, var(--coral-a), var(--coral-b));
    border-radius: 2px;
}

.section-header .highlight {
    background: linear-gradient(135deg, var(--coral-a), var(--coral-b));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-fill-color: transparent;
}

.section-header p {
    font-size: 20px;
    color: var(--gray);
    max-width: 800px;
    margin: 0 auto 16px;
    line-height: 1.6;
}

.section-header p:last-child {
    margin-bottom: 0;
}

.section-header p strong {
    color: var(--black);
    font-weight: 600;
}

.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
    margin-bottom: 80px;
}

.card {
    background: var(--white);
    padding: 40px;
    border-radius: 20px;
    border: 1px solid rgba(0, 0, 0, 0.08);
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    opacity: 0;
    transform: translateY(20px);
    position: relative;
    overflow: hidden;
}

.card.visible {
    animation: fadeInUp 0.8s ease-out forwards;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--coral-a), var(--coral-b));
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    border-color: var(--coral-a);
}

.card:hover::before {
    transform: scaleX(1);
}

.card h3 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 16px;
    letter-spacing: -0.5px;
}

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

/* Support Section */
.support {
    padding: 140px 48px 120px;
    background: linear-gradient(135deg, rgba(229, 129, 104, 0.03) 0%, rgba(255, 255, 255, 0) 100%);
}

.support-content {
    max-width: 1000px;
    margin: 0 auto;
    position: relative;
}

.support-header {
    font-size: 44px;
    font-weight: 900;
    text-align: center;
    margin-bottom: 40px;
    letter-spacing: -1px;
    line-height: 1.2;
}

.support-subtitle {
    font-size: 20px;
    line-height: 1.6;
    color: var(--gray);
    text-align: center;
    max-width: 800px;
    margin: 0 auto 60px;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.8s ease-out;
}

.support-subtitle.visible {
    opacity: 1;
    transform: translateY(0);
}

.support-subtitle strong {
    display: block;
    color: var(--black);
    font-weight: 600;
    margin-top: 16px;
    letter-spacing: -0.3px;
}

.support-item {
    margin-bottom: 48px;
    padding-left: 32px;
    position: relative;
    opacity: 0;
    transform: translateX(-20px);
}

.support-item.visible {
    animation: fadeInLeft 0.8s ease-out forwards;
}

@keyframes fadeInLeft {
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.support-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    width: 8px;
    height: 8px;
    background: var(--coral-a);
    border-radius: 50%;
}

.support-item h4 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
    letter-spacing: -0.3px;
}

.support-item p {
    color: var(--gray);
    line-height: 1.6;
}

/* CTA Section */
.final-cta {
    padding: 120px 48px;
    background: var(--black);
    color: var(--white);
    text-align: center;
}

.final-cta h2 {
    font-size: 48px;
    font-weight: 800;
    margin-bottom: 24px;
    letter-spacing: -1px;
}

.final-cta p {
    font-size: 20px;
    max-width: 700px;
    margin: 0 auto 48px;
    opacity: 0.9;
    line-height: 1.6;
}

.final-cta .cta-button {
    background: var(--white);
    color: var(--black);
}

.final-cta .cta-button:hover {
    background: var(--coral-a);
    color: var(--white);
}

/* Mobile Menu */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    cursor: pointer;
    padding: 8px;
}

.mobile-menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--black);
    transition: all 0.3s ease;
}

/* Responsive */
@media (max-width: 768px) {
    header {
        padding: 20px 24px;
    }

    .nav-links {
        display: none;
    }

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

    .hero h1 {
        font-size: 46px;
        line-height: 48px;
    }

    .hero .subtitle {
        font-size: 18px;
    }

    .thesis {
        padding: 60px 24px;
    }

    .thesis-text {
        padding: 32px 24px;
    }

    .thesis-line {
        font-size: 18px;
        line-height: 1.7;
    }

    .features, .support {
        padding: 80px 24px;
    }

    .section-header h2 {
        font-size: 32px;
        margin-bottom: 35px;
    }

    .section-header h2::after {
        width: 60px;
        height: 3px;
    }

    .support {
        padding: 100px 24px 80px;
    }

    .support-header {
        font-size: 32px;
    }

    .support-subtitle {
        font-size: 18px;
        margin-bottom: 50px;
    }

    .support-subtitle strong {
        margin-top: 12px;
    }

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