/* ==========================================================================
   gunsul.studio - Monochrome Stark Landing
   ========================================================================== */

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'Inter', sans-serif;
    font-weight: 300;
    line-height: 1.7;
    color: #0a0a0a;
    background: #ffffff;
    overflow-x: hidden;
}

/* ==========================================================================
   Margin Line - thin vertical line at 10% from left edge
   ========================================================================== */
.margin-line {
    position: fixed;
    top: 0;
    left: 10%;
    width: 1px;
    height: 100vh;
    background: #a3a3a3;
    z-index: 10;
    opacity: 0.4;
}

/* ==========================================================================
   Sections
   ========================================================================== */
.section {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.section--light {
    background: #ffffff;
    color: #0a0a0a;
}

.section--dark {
    background: #0a0a0a;
    color: #ffffff;
}

.section__content {
    width: 100%;
    max-width: 1200px;
    padding: 0 15%;
}

/* Page numbers - bottom right of each section */
.section__number {
    position: absolute;
    bottom: 40px;
    right: 40px;
    font-family: 'Inter', sans-serif;
    font-weight: 400;
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.3em;
    color: #a3a3a3;
}

.section--dark .section__number {
    color: #525252;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero__content {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.hero__title {
    font-family: 'Montserrat', sans-serif;
    font-weight: 900;
    font-size: clamp(48px, 8vw, 80px);
    line-height: 1.05;
    letter-spacing: -0.02em;
    color: #0a0a0a;
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.hero__title.is-visible {
    opacity: 1;
    transform: translateY(0);
}

.hero__title-dot {
    color: #525252;
}

.hero__bar {
    width: 60%;
    height: 8px;
    background: #0a0a0a;
    margin: 40px 0 0 0;
    margin-left: 5%;
    opacity: 0;
    transform: scaleX(0);
    transform-origin: left center;
    transition: opacity 0.6s ease 0.4s, transform 0.6s ease 0.4s;
}

.hero__bar.is-visible {
    opacity: 1;
    transform: scaleX(1);
}

/* ==========================================================================
   Statement Sections
   ========================================================================== */
.section--statement {
    min-height: 100vh;
}

.statement {
    font-family: 'Montserrat', sans-serif;
    font-weight: 900;
    font-size: clamp(36px, 5vw, 64px);
    line-height: 1.15;
    max-width: 800px;
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.statement.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* ==========================================================================
   Period / Closing Section
   ========================================================================== */
.section--period {
    min-height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.period-mark {
    font-family: 'Montserrat', sans-serif;
    font-weight: 900;
    font-size: 120px;
    line-height: 1;
    color: #0a0a0a;
    opacity: 0;
    transform: scale(0.5);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.period-mark.is-visible {
    opacity: 1;
    transform: scale(1);
}

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 768px) {
    .section__content {
        padding: 0 8%;
    }

    .hero__title {
        font-size: clamp(36px, 10vw, 60px);
    }

    .statement {
        font-size: clamp(28px, 7vw, 48px);
    }

    .hero__bar {
        width: 80%;
    }

    .section__number {
        bottom: 24px;
        right: 24px;
    }

    .period-mark {
        font-size: 80px;
    }

    .margin-line {
        left: 5%;
    }
}