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

:root {
    --bg-white: #FFFFFF;
    --bg-soft-gray: #F7F7F7;
    --accent-silver-blue: #C8D9E8;
    --text-black: #000000;
}

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

body {
    /* Neue Haas Grotesk equivalent - system fonts with Helvetica Neue fallback */
    font-family: -apple-system, BlinkMacSystemFont, 'Helvetica Neue', 'Helvetica', 'Arial', sans-serif;
    font-weight: 400;
    font-size: clamp(18px, 2vw, 20px);
    line-height: 1.6;
    background: var(--bg-white);
    color: var(--text-black);
    overflow-x: hidden;
    cursor: default;
    text-transform: lowercase;
    font-style: normal;
}

/* Custom Cursor - 50% opacity */
body {
    cursor: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24"><circle cx="12" cy="12" r="2" fill="black" opacity="0.5"/></svg>') 12 12, auto;
}

/* Subtle scale hover effect on interactive elements */
a, button, .scroll-hint {
    transition: transform 0.2s ease;
}

a:hover, button:hover, .scroll-hint:hover {
    transform: scale(1.02);
}

/* Background Gradient Drift - very slow, subtle (0.02x speed equivalent) */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 200%;
    height: 200%;
    background: linear-gradient(135deg, var(--bg-white) 0%, var(--bg-soft-gray) 100%);
    background-size: 100% 100%;
    opacity: 0.03;
    z-index: -1;
    animation: gradientDrift 600s linear infinite; /* Very slow drift */
    pointer-events: none;
    will-change: transform;
}

@keyframes gradientDrift {
    0% { transform: translate(0, 0) scale(1); }
    25% { transform: translate(-0.2%, -0.2%) scale(1.001); }
    50% { transform: translate(-0.4%, 0) scale(1.002); }
    75% { transform: translate(-0.2%, 0.2%) scale(1.001); }
    100% { transform: translate(0, 0) scale(1); }
}

/* Sections */
.section {
    min-height: 100vh;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    opacity: 1;
    transition: opacity 0.8s ease, filter 0.8s ease;
}

.section.fade-out {
    opacity: 0.3;
    filter: blur(4px);
}

.content {
    max-width: 720px;
    width: 100%;
    padding: 0 5vw;
    text-align: center;
    position: relative;
}

/* Section 1 — Intro */
.section-intro {
    background: var(--bg-white);
}

.intro-name {
    /* SF Pro Display Light equivalent */
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', system-ui, sans-serif;
    font-size: clamp(48px, 8vw, 120px);
    font-weight: 300;
    letter-spacing: 0.02em; /* +2% tracking */
    line-height: 1.1;
    margin-bottom: 2rem;
    text-transform: lowercase;
    opacity: 0;
    animation: fadeInUp 1.2s ease 0.3s forwards;
}

.intro-quote {
    font-size: clamp(16px, 2.5vw, 24px);
    font-weight: 400;
    letter-spacing: 0.01em;
    line-height: 1.6;
    margin-bottom: 3rem;
    text-transform: lowercase;
    font-style: normal;
    opacity: 0;
    animation: fadeInUp 1.2s ease 0.6s forwards;
}

.divider {
    width: 0;
    height: 1px;
    background: var(--accent-silver-blue);
    margin: 0 auto;
    opacity: 0;
    animation: expandDivider 1.5s ease 1s forwards;
}

@keyframes expandDivider {
    0% {
        width: 0;
        opacity: 0;
    }
    50% {
        opacity: 1;
    }
    100% {
        width: 50%;
        opacity: 1;
    }
}

.scroll-hint {
    margin-top: 4rem;
    display: flex;
    justify-content: center;
    align-items: center;
}

.dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent-silver-blue);
    opacity: 0.6;
    transition: transform 0.3s ease, opacity 0.3s ease;
    animation: float 2s ease-in-out infinite;
}

.scroll-hint:hover .dot {
    transform: scale(1.3);
    opacity: 1;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Section 2 — Origin */
.section-origin {
    background: var(--bg-white);
}

.origin-text {
    font-size: clamp(18px, 2.5vw, 24px);
    font-weight: 400;
    line-height: 1.6;
    margin-bottom: 1.5rem;
    text-transform: lowercase;
    letter-spacing: 0.01em;
    font-style: normal;
}

.origin-text .word {
    display: inline-block;
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.origin-text .word.fade-in {
    opacity: 1;
    transform: translateY(0);
}

/* Section 3 — Work & Focus */
.section-work {
    background: var(--bg-white);
}

.work-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 4rem;
    align-items: start;
    text-align: left;
}

.work-left {
    text-align: right;
}

.work-heading {
    /* SF Pro Display Light equivalent */
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', system-ui, sans-serif;
    font-size: clamp(32px, 4vw, 48px);
    font-weight: 300;
    letter-spacing: 0.02em; /* +2% tracking */
    color: var(--accent-silver-blue);
    text-transform: lowercase;
    font-style: normal;
    opacity: 0;
    transform: translateX(-20px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.work-heading.slide-in {
    opacity: 1;
    transform: translateX(0);
}

.work-right {
    opacity: 0;
    transform: translateX(20px);
    transition: opacity 0.8s ease 0.2s, transform 0.8s ease 0.2s;
}

.work-right.slide-in {
    opacity: 1;
    transform: translateX(0);
}

.work-text {
    font-size: clamp(18px, 2vw, 20px);
    font-weight: 400;
    line-height: 1.6;
    margin-bottom: 1.5rem;
    text-transform: lowercase;
    letter-spacing: 0.01em;
    font-style: normal;
}

/* Section 4 — Vision - warmer gradient on scroll */
.section-vision {
    background: linear-gradient(180deg, var(--bg-white) 0%, #FBFBFB 100%);
    position: relative;
}

.section-vision::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(255, 250, 245, 0) 0%, rgba(255, 248, 240, 0.3) 100%);
    opacity: 0;
    transition: opacity 1s ease;
    pointer-events: none;
    z-index: 0;
}

.section-vision.in-view::before {
    opacity: 1;
}

.section-vision .content {
    position: relative;
    z-index: 1;
}

.vision-main {
    /* SF Pro Display Light equivalent */
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', system-ui, sans-serif;
    font-size: clamp(48px, 6vw, 72px);
    font-weight: 300;
    letter-spacing: 0.02em; /* +2% tracking */
    line-height: 1.2;
    margin-bottom: 1.5rem;
    text-transform: lowercase;
    font-style: normal;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.vision-main.fade-in {
    opacity: 1;
    transform: translateY(0);
}

.vision-sub {
    font-size: 14px;
    font-weight: 400;
    letter-spacing: 0.05em;
    line-height: 1.6;
    text-transform: lowercase;
    font-style: normal;
    opacity: 0;
    transition: opacity 0.8s ease 0.3s;
}

.vision-sub.fade-in {
    opacity: 1;
}

/* Section 5 — Idle (empty, handled by JS) */
.section-idle {
    min-height: 100vh;
    background: var(--bg-white);
    cursor: pointer;
}

/* Fade Out State */
body.fade-to-white::before {
    animation: fadeToWhite 3s ease forwards;
}

body.fade-to-white .section {
    opacity: 0;
    transition: opacity 2s ease;
}

body.fade-to-white {
    cursor: none;
}

@keyframes fadeToWhite {
    to {
        opacity: 0;
        background: var(--bg-white);
    }
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .work-content {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }

    .work-left {
        text-align: center;
    }

    .work-heading {
        transform: translateY(-20px);
    }

    .work-heading.slide-in {
        transform: translateY(0);
    }

    .work-right {
        transform: translateY(20px);
    }

    .work-right.slide-in {
        transform: translateY(0);
    }

    .content {
        padding: 0 8vw;
    }
}

@media (max-width: 480px) {
    .intro-name {
        font-size: 48px;
    }

    .intro-quote {
        font-size: 16px;
    }

    .origin-text {
        font-size: 18px;
    }

    .work-text {
        font-size: 18px;
    }

    .vision-main {
        font-size: 36px;
    }
}

/* Smooth Scroll Parallax */
@media (prefers-reduced-motion: no-preference) {
    .section {
        will-change: opacity, transform;
    }
}

@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}