/* ====================================================
   main-intro.css — One-way Intro Landing for Main Mode
   Reuses the same design system as investor-intro.css
   but with mode-scholar blue accent (#7ba3cb)
   ==================================================== */

:root {
    --main-intro-accent: #7ba3cb;
    --main-intro-accent-dim: rgba(123, 163, 203, 0.12);
}

/* ─── Full-screen Intro Wrapper ─── */
#main-intro {
    position: fixed;
    inset: 0;
    z-index: 8000;
    background: var(--intro-bg, #08090D);
    overflow-y: auto;
    transition: transform 0.8s cubic-bezier(0.65, 0, 0.35, 1),
        opacity 0.6s cubic-bezier(0.65, 0, 0.35, 1);
    will-change: transform, opacity;
}

#main-intro.intro-hidden {
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
}

#main-intro.intro-gone {
    display: none;
}

/* ─── Container ─── */
#main-intro .intro-container {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 32px;
}

/* ─── Hero ─── */
#main-intro .intro-section.intro-hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    position: relative;
}

#main-intro .intro-hero-bg {
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at 50% 30%, rgba(123, 163, 203, 0.06) 0%, transparent 60%);
    pointer-events: none;
}

#main-intro .intro-hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 18px;
    border: 1px solid var(--main-intro-accent-dim);
    color: var(--main-intro-accent);
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    font-family: var(--intro-font-mono, 'JetBrains Mono', monospace);
    margin-bottom: 32px;
    opacity: 0;
    animation: intro-fade-up 0.8s 0.3s forwards;
}

#main-intro .intro-hero-badge .badge-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--main-intro-accent);
    animation: intro-pulse 2s infinite;
}

#main-intro .intro-hero-title {
    font-size: clamp(42px, 6vw, 72px);
    font-weight: 700;
    color: #F2F3F5;
    font-family: var(--intro-font-display, 'Playfair Display', serif);
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin: 0 0 20px;
    opacity: 0;
    animation: intro-fade-up 0.8s 0.5s forwards;
}

#main-intro .intro-hero-sub {
    font-size: 20px;
    color: #9CA3AF;
    line-height: 1.7;
    max-width: 600px;
    margin: 0 auto 48px;
    font-family: var(--intro-font-kr, 'Noto Sans KR', sans-serif);
    opacity: 0;
    animation: intro-fade-up 0.8s 0.7s forwards;
}

/* ─── Scroll Indicator ─── */
#main-intro .intro-scroll-hint {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    opacity: 0;
    animation: intro-fade-up 0.8s 1.2s forwards;
}

#main-intro .intro-scroll-hint span {
    font-size: 13px;
    color: #9CA3AF;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    font-family: var(--intro-font-mono, monospace);
}

#main-intro .intro-scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, var(--main-intro-accent), transparent);
    animation: intro-scroll-anim 2s infinite;
}

/* ─── Feature Cards ─── */
#main-intro .intro-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 40px;
    opacity: 0;
    animation: intro-fade-up 0.8s 0.9s forwards;
}

#main-intro .intro-card {
    position: relative;
    border: 1px solid rgba(255, 255, 255, 0.06);
    overflow: hidden;
    cursor: default;
    transition: border-color 0.3s, transform 0.3s;
}

#main-intro .intro-card:hover {
    border-color: rgba(123, 163, 203, 0.3);
    transform: translateY(-4px);
}

#main-intro .intro-card-visual {
    width: 100%;
    height: 220px;
    position: relative;
    overflow: hidden;
}

#main-intro .intro-card-visual.v-perspective {
    background: linear-gradient(135deg, #0A1628 0%, #0F203A 40%, #162B4D 60%, #0D1726 100%);
}

#main-intro .intro-card-visual.v-perspective::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 40% 40%, rgba(123, 163, 203, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 60% 60%, rgba(96, 165, 250, 0.06) 0%, transparent 40%);
}

#main-intro .intro-card-visual.v-timeline {
    background: linear-gradient(135deg, #0D0F14 0%, #111827 40%, #1F2937 60%, #111318 100%);
}

#main-intro .intro-card-visual.v-timeline::after {
    content: '';
    position: absolute;
    inset: 0;
    background:
        repeating-linear-gradient(0deg, transparent, transparent 40px, rgba(123, 163, 203, 0.04) 40px, rgba(123, 163, 203, 0.04) 41px);
}

#main-intro .intro-card-visual.v-briefing {
    background: linear-gradient(135deg, #100D18 0%, #1A1330 40%, #231C44 60%, #140F22 100%);
}

#main-intro .intro-card-visual.v-briefing::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 50% 50%, rgba(167, 139, 250, 0.08) 0%, transparent 50%);
}

#main-intro .intro-card-icon {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    opacity: 0.15;
}

#main-intro .intro-card-body {
    padding: 24px;
    background: var(--intro-bg, #08090D);
}

#main-intro .intro-card-tag {
    font-size: 13px;
    color: var(--main-intro-accent);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    font-family: var(--intro-font-mono, monospace);
    font-weight: 600;
    margin-bottom: 8px;
}

#main-intro .intro-card-title {
    font-size: 26px;
    font-weight: 700;
    color: #F2F3F5;
    font-family: var(--intro-font-display, serif);
    margin: 0 0 8px;
    line-height: 1.3;
}

#main-intro .intro-card-desc {
    font-size: 16px;
    color: #9CA3AF;
    line-height: 1.6;
    font-family: var(--intro-font-kr, sans-serif);
    margin: 0;
}

/* ─── Stats Bar ─── */
#main-intro .intro-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.06);
    margin-top: 64px;
    opacity: 0;
    animation: intro-fade-up 0.8s 1.0s forwards;
}

#main-intro .intro-stat {
    background: var(--intro-bg, #08090D);
    padding: 24px;
    text-align: center;
}

#main-intro .intro-stat-value {
    font-size: 36px;
    font-weight: 700;
    color: #F2F3F5;
    font-family: var(--intro-font-mono, monospace);
    margin-bottom: 4px;
}

#main-intro .intro-stat-label {
    font-size: 13px;
    color: #9CA3AF;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    font-family: var(--intro-font-mono, monospace);
}

/* ─── CTA ─── */
#main-intro .intro-cta {
    text-align: center;
    padding: 80px 0 40px;
    opacity: 0;
    animation: intro-fade-up 0.8s 1.1s forwards;
}

#main-intro .intro-cta-text {
    font-size: 16px;
    color: #9CA3AF;
    font-family: var(--intro-font-mono, monospace);
    letter-spacing: 0.05em;
}

#main-intro .intro-cta-arrow {
    margin-top: 16px;
    animation: intro-bounce 2s infinite;
}

/* ─── Animations ─── */
@keyframes intro-fade-up {
    from {
        opacity: 0;
        transform: translateY(24px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes intro-pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.3;
    }
}

@keyframes intro-bounce {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(8px);
    }
}

@keyframes intro-scroll-anim {
    0% {
        transform: scaleY(0);
        transform-origin: top;
        opacity: 1;
    }

    50% {
        transform: scaleY(1);
        transform-origin: top;
        opacity: 1;
    }

    100% {
        transform: scaleY(0);
        transform-origin: bottom;
        opacity: 0;
    }
}

/* ─── Responsive ─── */
@media (max-width: 768px) {
    #main-intro .intro-cards {
        grid-template-columns: 1fr;
    }

    #main-intro .intro-stats {
        grid-template-columns: repeat(2, 1fr);
    }

    #main-intro .intro-hero-title {
        font-size: 36px;
    }

    #main-intro .intro-container {
        padding: 0 20px;
    }
}