/* ============================================
   K-POP AlphaCombi Landing Page
   ============================================ */

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: #1E293B;
    line-height: 1.6;
    overflow-x: hidden;
    background: #fff;
}

h1,
h2,
h3 {
    font-family: 'Poppins', 'Inter', sans-serif;
    line-height: 1.2;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: inherit;
    text-decoration: none;
}

.container {
    max-width: 1080px;
    margin: 0 auto;
    padding: 0 24px;
}

/* --- Accent Colors --- */
.accent {
    color: #E91E8C;
}

.accent-white {
    color: #fff;
    text-shadow: 0 2px 20px rgba(233, 30, 140, 0.4);
}

/* --- Section Base --- */
.section {
    padding: 80px 0;
    position: relative;
}

.section-white {
    background: #fff;
}

.section-pink {
    background: #FDF2F8;
}

.section h2 {
    font-size: clamp(1.8rem, 5vw, 2.8rem);
    text-align: center;
    margin-bottom: 16px;
    font-weight: 800;
}

.section-sub,
.section-sub-light {
    text-align: center;
    font-size: clamp(1rem, 2.5vw, 1.2rem);
    margin-bottom: 40px;
    color: #64748B;
}

.section-sub-light {
    color: #CBD5E1;
}

/* ============================================
   SECTION 1: HERO
   ============================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    background: url('images/hero-concert.png') center center / cover no-repeat;
    color: #fff;
    padding: 40px 24px;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg,
            rgba(0, 0, 0, 0.65) 0%,
            rgba(20, 0, 30, 0.75) 100%);
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 720px;
}

.hero-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-bottom: 32px;
}

.hero-icon {
    width: 56px;
    height: 56px;
    border-radius: 14px;
    box-shadow: 0 4px 20px rgba(233, 30, 140, 0.4);
}

.hero-app-name {
    font-family: 'Poppins', sans-serif;
    font-weight: 700;
    font-size: 1.2rem;
    letter-spacing: 0.02em;
}

.hero h1 {
    font-size: clamp(2rem, 7vw, 3.5rem);
    font-weight: 900;
    margin-bottom: 20px;
    text-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
}

.hero-sub {
    font-size: clamp(1rem, 2.8vw, 1.25rem);
    margin-bottom: 32px;
    opacity: 0.92;
    line-height: 1.7;
}

.hero-note {
    font-size: 0.9rem;
    opacity: 0.7;
    margin-top: 16px;
}

.hero-scroll-hint {
    position: absolute;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    text-align: center;
    font-size: 0.85rem;
    opacity: 0.6;
    color: #fff;
}

.scroll-arrow {
    font-size: 1.4rem;
    animation: bounce 2s infinite;
}

@keyframes bounce {

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

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

/* --- Store Badges --- */
.store-badges {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

.store-badge {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
}

.store-badge img {
    height: 48px;
    width: auto;
    transition: transform 0.2s ease;
}

.store-badge:hover img {
    transform: scale(1.05);
}

.store-badges-sm .store-badge img {
    height: 40px;
}

.badge-coming-soon {
    font-size: 10px;
    margin-top: 5px;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.hero .badge-coming-soon {
    color: rgba(255, 255, 255, 0.55);
}

.section-cta .badge-coming-soon {
    color: rgba(255, 255, 255, 0.55);
}

.footer .badge-coming-soon {
    color: rgba(255, 255, 255, 0.55);
}

/* ============================================
   SECTION 2: PAIN POINT
   ============================================ */
.pain-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
    margin-bottom: 32px;
}

.pain-card {
    background: #F8FAFC;
    border: 1px solid #E2E8F0;
    border-radius: 16px;
    padding: 32px 24px;
    text-align: center;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.pain-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
}

.pain-emoji {
    font-size: 2.4rem;
    margin-bottom: 16px;
}

.pain-card p {
    font-size: 1.05rem;
    font-style: italic;
    color: #475569;
}

.pain-solution {
    text-align: center;
    font-size: clamp(1.4rem, 3.5vw, 1.8rem);
    color: #1E293B;
    margin-top: 8px;
    font-family: 'Poppins', sans-serif;
    font-weight: 700;
}

.pain-solution strong {
    color: #E91E8C;
}

.pain-solution-sub {
    display: block;
    font-family: 'Inter', sans-serif;
    font-weight: 400;
    font-size: clamp(0.95rem, 2vw, 1.05rem);
    color: #64748B;
    margin-top: 8px;
}

/* ============================================
   SECTION 3, 4, 5: SCREENSHOT SHOWCASES
   ============================================ */
.screenshot-showcase {
    text-align: center;
}

.screenshot-img {
    max-width: 100%;
    width: 720px;
    margin: 0 auto;
    border-radius: 8px;
}

/* ============================================
   SECTION 6: FEATURES GRID
   ============================================ */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.feature-card {
    background: #F8FAFC;
    border: 1px solid #E2E8F0;
    border-radius: 16px;
    overflow: hidden;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
}

.feature-img-wrap {
    width: 100%;
    aspect-ratio: 3 / 4;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #FDF2F8;
}

.feature-img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    padding: 12px;
}

.feature-img-cover {
    aspect-ratio: 4 / 3;
    background: #1E293B;
}

.feature-img-photo {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.feature-card h3 {
    font-size: 1.15rem;
    padding: 16px 20px 4px;
    color: #1E293B;
}

.feature-card p {
    font-size: 0.95rem;
    padding: 0 20px 20px;
    color: #64748B;
}

/* ============================================
   SECTION 7: CONCERT CALENDAR
   ============================================ */
.section-dark {
    background: #0F172A;
    color: #F1F5F9;
    position: relative;
    overflow: hidden;
}

.calendar-bg {
    position: absolute;
    inset: 0;
    background: url('images/stadium-lightsticks.png') center center / cover no-repeat;
    opacity: 0.12;
    z-index: 0;
}

.calendar-container {
    position: relative;
    z-index: 1;
}

.section-dark h2 {
    color: #F1F5F9;
}

/* Calendar Tabs */
.calendar-tabs {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 32px;
}

.cal-tab {
    font-family: 'Inter', sans-serif;
    font-size: 0.95rem;
    font-weight: 600;
    padding: 10px 20px;
    border: 2px solid #334155;
    border-radius: 999px;
    background: transparent;
    color: #94A3B8;
    cursor: pointer;
    transition: all 0.2s ease;
}

.cal-tab:hover {
    border-color: #E91E8C;
    color: #E91E8C;
}

.cal-tab.active {
    background: #E91E8C;
    border-color: #E91E8C;
    color: #fff;
}

/* Calendar Panels */
.cal-panel {
    display: none;
}

.cal-panel.active {
    display: block;
}

.cal-panel h3 {
    font-size: 1.3rem;
    margin-bottom: 16px;
    color: #F9A8D4;
}

.cal-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.92rem;
}

.cal-table thead th {
    text-align: left;
    padding: 10px 12px;
    border-bottom: 2px solid #334155;
    color: #94A3B8;
    font-weight: 600;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.cal-table tbody td {
    padding: 10px 12px;
    border-bottom: 1px solid #1E293B;
    color: #CBD5E1;
}

.cal-table tbody tr:hover {
    background: rgba(233, 30, 140, 0.08);
}

.cal-highlight td {
    color: #F9A8D4 !important;
    font-weight: 600;
    background: rgba(233, 30, 140, 0.12);
}

.cal-year td {
    text-align: center;
    font-weight: 700;
    font-size: 1rem;
    color: #E91E8C;
    padding: 16px 12px 8px;
    border-bottom: 2px solid #334155;
    letter-spacing: 0.1em;
}

.cal-disclaimer {
    text-align: center;
    margin-top: 32px;
    font-size: 0.88rem;
    color: #64748B;
}

.cal-disclaimer a {
    color: #F9A8D4;
    text-decoration: underline;
    text-underline-offset: 3px;
}

.cal-disclaimer a:hover {
    color: #E91E8C;
}

/* ============================================
   SECTION 8: FINAL CTA
   ============================================ */
.section-cta {
    background: linear-gradient(135deg, #E91E8C 0%, #BE185D 50%, #9D174D 100%);
    color: #fff;
    text-align: center;
    padding: 100px 24px;
}

.section-cta h2 {
    color: #fff;
    font-size: clamp(2rem, 6vw, 3rem);
    margin-bottom: 16px;
}

.cta-sub {
    font-size: clamp(1rem, 2.5vw, 1.25rem);
    margin-bottom: 32px;
    opacity: 0.92;
}

/* ============================================
   SECTION 9: DISCLAIMER / NOTE
   ============================================ */
.section-note {
    background: #F8FAFC;
    padding: 60px 0;
}

.section-note h2 {
    font-size: 1.6rem;
    margin-bottom: 16px;
}

.section-note p {
    max-width: 720px;
    margin: 0 auto;
    text-align: center;
    font-size: 1rem;
    color: #475569;
    line-height: 1.8;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    background: #111827;
    color: #94A3B8;
    text-align: center;
    padding: 48px 24px 32px;
}

.footer-brand {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-bottom: 20px;
}

.footer-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
}

.footer-name {
    font-family: 'Poppins', sans-serif;
    font-weight: 700;
    font-size: 1.1rem;
    color: #F1F5F9;
}

.footer-links {
    margin-top: 20px;
    margin-bottom: 12px;
    font-size: 0.9rem;
}

.footer-links a {
    color: #CBD5E1;
    text-decoration: underline;
    text-underline-offset: 3px;
}

.footer-links a:hover {
    color: #E91E8C;
}

.footer-sep {
    margin: 0 8px;
    color: #475569;
}

.footer-copy {
    font-size: 0.85rem;
    margin-bottom: 16px;
}

.footer-rights {
    font-size: 0.75rem;
    color: #475569;
    max-width: 600px;
    margin: 16px auto;
    line-height: 1.6;
    text-align: center;
}

.footer-rights a {
    color: #94A3B8;
    text-decoration: underline;
    text-underline-offset: 2px;
}

.footer-rights a:hover {
    color: #E91E8C;
}

.footer-sejong {
    font-size: 0.8rem;
    font-style: italic;
    color: #64748B;
    max-width: 480px;
    margin: 0 auto;
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
    .section {
        padding: 60px 0;
    }

    .hero {
        min-height: 100svh;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .hero-sub br {
        display: none;
    }

    .pain-cards {
        grid-template-columns: 1fr;
        max-width: 400px;
        margin-left: auto;
        margin-right: auto;
    }

    .feature-grid {
        grid-template-columns: 1fr;
        max-width: 400px;
        margin-left: auto;
        margin-right: auto;
    }

    .screenshot-img {
        width: 100%;
        border-radius: 0;
    }

    .cal-table {
        font-size: 0.82rem;
    }

    .cal-table thead th,
    .cal-table tbody td {
        padding: 8px 8px;
    }

    .calendar-tabs {
        gap: 6px;
    }

    .cal-tab {
        font-size: 0.82rem;
        padding: 8px 14px;
    }

    .section-cta {
        padding: 60px 24px;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 1.7rem;
    }

    .store-badge img {
        height: 40px;
    }

    .feature-img-wrap {
        aspect-ratio: 1 / 1;
    }
}