/* concurrengine.com - Kinetic Typography Manifesto */

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

:root {
    --near-black: #111111;
    --white: #FFFFFF;
    --orange: #FF5722;
    --blue: #3B82F6;
    --mid-gray: #9CA3AF;
    --dark-gray: #4B5563;
    --gold: #F59E0B;
}

body {
    background-color: var(--near-black);
    color: var(--white);
    font-family: 'Manrope', sans-serif;
    font-weight: 400;
    font-size: clamp(0.9rem, 1.1vw, 1rem);
    line-height: 1.75;
    overflow-x: hidden;
}

/* ============================
   HERO: SPLIT ENTRY
   ============================ */

#hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.split-container {
    display: flex;
    align-items: baseline;
    justify-content: center;
    position: relative;
}

.split-left,
.split-right {
    font-family: 'Bebas Neue', sans-serif;
    font-weight: 400;
    font-size: clamp(4rem, 14vw, 12rem);
    text-transform: uppercase;
    color: var(--white);
    display: inline-block;
}

.split-left {
    transform: translateX(-100vw);
    transition: transform 1s cubic-bezier(0.16, 1, 0.3, 1);
}

.split-left.arrived {
    transform: translateX(0);
}

.split-right {
    transform: translateX(100vw);
    transition: transform 1s cubic-bezier(0.16, 1, 0.3, 1);
    mix-blend-mode: screen;
    color: var(--orange);
}

.split-right.arrived {
    transform: translateX(0);
}

.hero-sub {
    font-family: 'Manrope', sans-serif;
    font-weight: 400;
    font-size: 1rem;
    color: var(--mid-gray);
    margin-top: 24px;
    text-align: center;
    min-height: 1.5em;
}

/* ============================
   FORK SECTION
   ============================ */

#fork-section {
    min-height: 120vh;
    padding: 80px 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.fork-header {
    text-align: center;
    margin-bottom: 48px;
    overflow: hidden;
}

.fork-word {
    font-family: 'Bebas Neue', sans-serif;
    font-size: clamp(2rem, 6vw, 4rem);
    color: var(--white);
    display: inline-block;
    transition: transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.fork-word.split .fork-left-part {
    display: inline-block;
    transform: translateX(-20vw);
    transition: transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.fork-word.split .fork-right-part {
    display: inline-block;
    transform: translateX(20vw);
    transition: transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.fork-columns {
    display: flex;
    gap: 10vw;
    width: 90vw;
    max-width: 1000px;
    opacity: 0;
    transition: opacity 0.5s ease;
}

.fork-columns.visible {
    opacity: 1;
}

.fork-col {
    flex: 1;
    border: 1px solid var(--dark-gray);
    display: flex;
    flex-direction: column;
}

.col-header {
    font-family: 'Bebas Neue', sans-serif;
    font-size: clamp(1.5rem, 3vw, 2.5rem);
    color: var(--orange);
    padding: 16px 20px;
    border-bottom: 1px solid var(--dark-gray);
}

.col-scroll {
    height: 50vh;
    overflow-y: auto;
    padding: 20px;
    font-family: 'Manrope', sans-serif;
    font-weight: 400;
    font-size: clamp(0.85rem, 1vw, 0.95rem);
    color: var(--mid-gray);
    line-height: 1.75;
}

.col-scroll p {
    margin-bottom: 16px;
}

.col-scroll em {
    color: var(--white);
    font-style: italic;
}

/* ============================
   RACE SECTION
   ============================ */

#race-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.race-track {
    display: flex;
    flex-direction: column;
    gap: 32px;
    width: 100%;
    padding: 0 20px;
}

.race-word {
    font-family: 'Bebas Neue', sans-serif;
    font-size: clamp(3rem, 8vw, 6rem);
    color: var(--white);
    transform: translateX(-100%);
    transition: transform 2s cubic-bezier(0.16, 1, 0.3, 1), color 0.3s ease, text-shadow 0.3s ease;
    position: relative;
}

.race-word::before,
.race-word::after {
    content: 'PROCESS';
    position: absolute;
    top: 0;
    left: 0;
    opacity: 0;
}

.race-word.racing {
    transform: translateX(calc(100vw - 100%));
}

.race-word.racing::before {
    opacity: 0.3;
    transform: translateX(-20px);
    transition: opacity 0.5s ease;
}

.race-word.racing::after {
    opacity: 0.1;
    transform: translateX(-40px);
    transition: opacity 0.5s ease;
}

#race-1.racing { transition-duration: 2s; }
#race-2.racing { transition-duration: 2.8s; }
#race-3.racing { transition-duration: 3.5s; }

#race-1.finished { color: var(--orange); text-shadow: 0 0 20px rgba(255, 87, 34, 0.5); }
#race-2.finished { color: var(--mid-gray); }
#race-3.finished { color: var(--dark-gray); }

/* ============================
   OVERLAP SECTION
   ============================ */

#overlap-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.overlap-container {
    position: relative;
    width: 80vw;
    max-width: 600px;
    height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.overlap-word {
    font-family: 'Bebas Neue', sans-serif;
    font-size: clamp(5rem, 12vw, 10rem);
    position: absolute;
}

.overlap-read {
    color: var(--blue);
    opacity: 0.6;
    z-index: 1;
}

.overlap-write {
    color: var(--orange);
    opacity: 0.6;
    z-index: 2;
}

.overlap-divider {
    position: absolute;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--gold);
    z-index: 3;
    animation: slideDivider 3s ease-in-out infinite alternate;
}

@keyframes slideDivider {
    from { transform: translateY(-50px); }
    to { transform: translateY(50px); }
}

/* ============================
   SYNC SECTION
   ============================ */

#sync-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.sync-container {
    position: relative;
    width: 80vw;
    max-width: 600px;
    height: 200px;
}

.sync-letter {
    font-family: 'Bebas Neue', sans-serif;
    font-size: clamp(4rem, 10vw, 8rem);
    color: var(--white);
    position: absolute;
    transition: transform 1.5s cubic-bezier(0.16, 1, 0.3, 1), color 0.5s ease;
}

.sync-letter.synced {
    color: var(--gold);
}

/* ============================
   RESOLUTION FOOTER
   ============================ */

#resolution-footer {
    min-height: 40vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 60px 20px;
}

.footer-text {
    font-family: 'Bebas Neue', sans-serif;
    font-size: clamp(2rem, 5vw, 4rem);
    color: var(--white);
    letter-spacing: 0.05em;
}

.footer-letter {
    display: inline-block;
    opacity: 0;
    transition: opacity 0.2s ease, transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.footer-letter.arrived {
    opacity: 1;
    transform: translate(0, 0) !important;
}

/* ============================
   RESPONSIVE
   ============================ */

@media (max-width: 768px) {
    .fork-columns {
        flex-direction: column;
        gap: 24px;
    }

    .col-scroll {
        height: 40vh;
    }

    .race-word {
        font-size: clamp(2rem, 6vw, 4rem);
    }
}