@charset "utf-8";

.at_page {
    background: #fafbfd;
    color: #2a3a55;
}

/* ===== Hero with floating language bubbles ===== */
.at_hero {
    position: relative;
    padding: 200px 20px 140px;
    text-align: center;
    color: #fff;
    background:
        radial-gradient(ellipse at 18% 22%, rgba(255, 255, 255, 0.24), transparent 48%),
        radial-gradient(ellipse at 82% 68%, rgba(255, 209, 102, 0.18), transparent 46%),
        var(--brand-footer-gradient, linear-gradient(180deg, #00a8d4 0%, #36b6c1 100%));
    overflow: hidden;
}

.at_hero_bg {
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 1;
}

.at_lang_bubble {
    position: absolute;
    font-family: "Noto Sans JP", "Noto Sans JP", serif;
    color: rgba(255, 255, 255, 0.18);
    font-size: clamp(1.6rem, 2.4vw, 2.8rem);
    font-weight: 600;
    white-space: nowrap;
    user-select: none;
    animation: atFloat 12s ease-in-out infinite;
    animation-delay: calc(var(--i) * -1.1s);
}

.at_bubble_0  { top: 12%; left: 8%; }
.at_bubble_1  { top: 22%; left: 78%; color: rgba(255, 255, 255, 0.26); }
.at_bubble_2  { top: 65%; left: 14%; color: rgba(255, 255, 255, 0.24); }
.at_bubble_3  { top: 82%; left: 70%; }
.at_bubble_4  { top: 40%; left: 4%; color: rgba(255, 255, 255, 0.2); font-size: 2.4rem; }
.at_bubble_5  { top: 8%;  left: 50%; color: rgba(255, 255, 255, 0.22); }
.at_bubble_6  { top: 55%; left: 85%; }
.at_bubble_7  { top: 30%; left: 30%; color: rgba(255, 255, 255, 0.22); }
.at_bubble_8  { top: 75%; left: 42%; color: rgba(255, 255, 255, 0.26); }
.at_bubble_9  { top: 18%; left: 64%; }
.at_bubble_10 { top: 50%; left: 56%; color: rgba(255, 255, 255, 0.18); }
.at_bubble_11 { top: 88%; left: 22%; color: rgba(255, 255, 255, 0.22); }

@keyframes atFloat {
    0%, 100% { transform: translateY(0) rotate(-2deg); opacity: 0.85; }
    50%      { transform: translateY(-12px) rotate(2deg); opacity: 1; }
}

.at_hero_content {
    position: relative;
    z-index: 2;
    max-width: 1180px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1.3fr 1fr;
    gap: 60px;
    align-items: center;
}

.at_hero_left { min-width: 0; }

.at_hero_visual {
    display: flex;
    align-items: center;
    justify-content: center;
}

.at_hero_visual img {
    width: 100%;
    max-width: 360px;
    height: auto;
    filter: drop-shadow(0 18px 30px rgba(0, 0, 0, 0.35));
}

.at_badge {
    display: inline-block;
    padding: 6px 18px;
    border: 1px solid rgba(255, 255, 255, 0.72);
    border-radius: 999px;
    color: #fff;
    font-family: "Roboto Condensed", sans-serif;
    font-size: 1.3rem;
    letter-spacing: 0.32em;
    margin-bottom: 26px;
    text-transform: uppercase;
}

.at_hero h1 {
    font-size: clamp(3.4rem, 5.2vw, 5.4rem);
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 16px;
    letter-spacing: 0;
    text-shadow: 0 2px 12px rgba(0, 0, 0, 0.25);
}

.at_hero_sub {
    font-size: 2.1rem;
    color: #fff;
    font-weight: 600;
    margin-bottom: 24px;
    letter-spacing: 0;
}

.at_hero_lead {
    font-size: 1.65rem;
    line-height: 1.85;
    color: rgba(255, 255, 255, 0.92);
    max-width: 740px;
    margin: 0 auto 36px;
    letter-spacing: 0;
}

.at_lang_strip {
    display: inline-flex;
    align-items: baseline;
    gap: 12px;
    padding: 14px 28px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: 999px;
    backdrop-filter: blur(6px);
}

.at_lang_strip span {
    font-family: "Roboto Condensed", sans-serif;
    font-size: 3.4rem;
    font-weight: 800;
    color: #fff;
    line-height: 1;
}

.at_lang_strip small {
    font-size: 1.4rem;
    letter-spacing: 0.1em;
    color: rgba(255, 255, 255, 0.78);
}

/* ===== Shared section heading style ===== */
.at_section_heading {
    font-family: "Noto Sans JP", sans-serif;
    font-size: 3rem;
    font-weight: 800;
    color: var(--brand-navy, #0f1d4a);
    text-align: center;
    margin-bottom: 14px;
    letter-spacing: 0;
}

.at_section_lead {
    font-size: 1.65rem;
    line-height: 1.85;
    color: #4a5670;
    max-width: 760px;
    margin: 0 auto 56px;
    text-align: center;
}

/* ===== Editions ===== */
.at_editions {
    padding: 96px 20px 80px;
    background: #fff;
}

.at_edition_grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
    max-width: 1180px;
    margin: 0 auto;
}

.at_edition_card {
    position: relative;
    background: #fff;
    border: 1px solid #e6eaf2;
    border-radius: 18px;
    padding: 36px 32px 32px;
    box-shadow: 0 10px 32px rgba(15, 29, 74, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
    overflow: hidden;
}

.at_edition_card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 6px;
}

.at_edition_1::before { background: linear-gradient(90deg, #6c91ff, #88c4f0); }
.at_edition_2::before { background: linear-gradient(90deg, #ffd166, #ff9f5a); }
.at_edition_3::before { background: linear-gradient(90deg, #00a8d4, #36b6c1); }

.at_edition_card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 44px rgba(15, 29, 74, 0.12);
    border-color: rgba(0, 168, 212, 0.35);
}

.at_edition_logo {
    height: 100px;
    display: flex;
    align-items: center;
    justify-content: flex-start;
    margin-bottom: 18px;
}

.at_edition_logo img {
    max-height: 100px;
    max-width: 70%;
    object-fit: contain;
    object-position: left center;
}

.at_edition_top {
    margin-bottom: 18px;
}

.at_edition_tag {
    display: inline-block;
    font-family: "Roboto Condensed", sans-serif;
    font-size: 1.15rem;
    font-weight: 700;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    padding: 5px 12px;
    border-radius: 999px;
}

.at_edition_1 .at_edition_tag { color: #2a4ec0; background: rgba(108, 145, 255, 0.12); }
.at_edition_2 .at_edition_tag { color: #b56c1e; background: rgba(255, 159, 90, 0.16); }
.at_edition_3 .at_edition_tag { color: #00657f; background: rgba(0, 168, 212, 0.12); }

.at_edition_name {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--brand-navy, #0f1d4a);
    line-height: 1.25;
    margin-bottom: 10px;
}

.at_edition_lead {
    font-size: 1.5rem;
    font-weight: 600;
    color: #1f3c70;
    line-height: 1.55;
    margin-bottom: 18px;
}

.at_edition_body {
    font-size: 1.45rem;
    line-height: 1.8;
    color: #4a5670;
    margin-bottom: 22px;
}

.at_edition_feats {
    list-style: none;
    padding: 0;
    margin: 0;
    border-top: 1px solid #eef1f7;
    padding-top: 20px;
}

.at_edition_feats li {
    position: relative;
    padding: 10px 0 10px 28px;
    font-size: 1.4rem;
    line-height: 1.55;
    color: #3a4660;
    border-bottom: 1px solid #f5f7fb;
}

.at_edition_feats li:last-child {
    border-bottom: none;
}

.at_edition_feats li::before {
    content: "→";
    position: absolute;
    left: 0;
    top: 10px;
    color: var(--brand-cyan, #00a8d4);
    font-weight: 700;
}

/* ===== Conference experience ===== */
.at_conference_focus {
    padding: 88px 20px;
    background: #fff;
}

.at_conference_inner {
    max-width: 1120px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: minmax(260px, 0.86fr) minmax(0, 1.14fr);
    gap: 52px;
    align-items: center;
}

.at_conference_visual {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 320px;
    border-radius: 8px;
    background: linear-gradient(180deg, #e8f8fb 0%, #f7fdff 100%);
    border: 1px solid #d8edf2;
}

.at_conference_visual img {
    width: min(76%, 320px);
    height: auto;
    filter: drop-shadow(0 16px 22px rgba(0, 101, 127, 0.14));
}

.at_conference_copy span {
    display: inline-block;
    margin-bottom: 12px;
    padding: 5px 12px;
    border-radius: 999px;
    background: rgba(0, 168, 212, 0.1);
    color: var(--brand-cyan, #00a8d4);
    font-size: 1.2rem;
    font-weight: 800;
    letter-spacing: 0;
}

.at_conference_copy h2 {
    margin-bottom: 18px;
    color: var(--brand-navy, #0f1d4a);
    font-size: 3rem;
    font-weight: 800;
    line-height: 1.35;
    letter-spacing: 0;
}

.at_conference_copy p {
    margin-bottom: 24px;
    color: #4a5670;
    font-size: 1.6rem;
    line-height: 1.9;
}

.at_conference_copy ul {
    display: grid;
    gap: 12px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.at_conference_copy li {
    position: relative;
    padding-left: 28px;
    color: #33435f;
    font-size: 1.45rem;
    line-height: 1.75;
}

.at_conference_copy li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.72em;
    width: 10px;
    height: 10px;
    border-radius: 999px;
    background: var(--brand-cyan, #00a8d4);
}

/* ===== Public showcases ===== */
.at_showcase {
    padding: 90px 20px;
    background:
        radial-gradient(ellipse at 88% 18%, rgba(255, 209, 102, 0.18), transparent 45%),
        linear-gradient(180deg, #f8fbfd 0%, #eef6f8 100%);
}

.at_showcase_grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 20px;
    max-width: 1180px;
    margin: 0 auto;
}

.at_showcase_card {
    min-height: 220px;
    padding: 28px 24px;
    border: 1px solid #dce8ee;
    border-radius: 14px;
    background: #fff;
    box-shadow: 0 8px 26px rgba(0, 101, 127, 0.07);
}

.at_showcase_num {
    margin-bottom: 14px;
    color: var(--brand-cyan, #00a8d4);
    font-family: "Roboto Condensed", sans-serif;
    font-size: 1.8rem;
    font-weight: 800;
    letter-spacing: 0;
}

.at_showcase_card h3 {
    margin-bottom: 12px;
    color: var(--brand-navy, #0f1d4a);
    font-size: 1.8rem;
    font-weight: 800;
    line-height: 1.4;
}

.at_showcase_card p {
    margin: 0;
    color: #4a5670;
    font-size: 1.45rem;
    line-height: 1.75;
}

/* ===== How (strengths) ===== */
.at_how {
    padding: 90px 20px 90px;
    background: linear-gradient(180deg, #fafbfd 0%, #eef1f7 100%);
}

.at_how_grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
    max-width: 1180px;
    margin: 0 auto;
}

.at_how_card {
    background: #fff;
    border: 1px solid #e6eaf2;
    border-radius: 14px;
    padding: 30px 26px;
    box-shadow: 0 6px 20px rgba(15, 29, 74, 0.05);
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.at_how_card:hover {
    transform: translateY(-4px);
    box-shadow: 0 14px 32px rgba(15, 29, 74, 0.1);
}

.at_how_num {
    font-family: "Roboto Condensed", sans-serif;
    font-size: 1.6rem;
    font-weight: 700;
    letter-spacing: 0.18em;
    color: #ffd166;
    margin-bottom: 12px;
}

.at_how_card h3 {
    font-size: 1.9rem;
    font-weight: 800;
    color: var(--brand-navy, #0f1d4a);
    margin-bottom: 12px;
    line-height: 1.4;
}

.at_how_card p {
    font-size: 1.5rem;
    line-height: 1.8;
    color: #4a5670;
}

/* ===== CTA ===== */
.at_cta {
    padding: 100px 20px 120px;
    background: linear-gradient(135deg, #00657f 0%, #00a8d4 60%, #36b6c1 100%);
    color: #fff;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.at_cta::before {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 50% 0%, rgba(255, 209, 102, 0.18), transparent 50%);
}

.at_cta > div {
    position: relative;
    z-index: 2;
}

.at_cta h2 {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 36px;
    letter-spacing: 0;
}

.at_cta .view_all_btn {
    background: #ffd166;
    color: var(--brand-navy, #0f1d4a);
    border: 2px solid #ffd166;
    padding: 16px 48px;
    font-size: 1.7rem;
    font-weight: 800;
    border-radius: 999px;
    letter-spacing: 0;
    transition: all 0.3s ease;
}

.at_cta .view_all_btn:hover {
    background: #fff;
    color: #00657f;
    border-color: #fff;
}

.at_cta .cta_buttons {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

.at_cta .back_link {
    color: rgba(255, 255, 255, 0.78);
    text-decoration: none;
    font-size: 1.4rem;
}

.at_cta .back_link:hover {
    color: #ffd166;
}

@media (max-width: 980px) {
    .at_hero_content {
        grid-template-columns: 1fr;
        gap: 28px;
    }
    .at_hero_visual {
        max-width: 240px;
        margin: 0 auto;
    }
    .at_edition_grid {
        grid-template-columns: 1fr;
    }
    .at_showcase_grid {
        grid-template-columns: 1fr;
    }
    .at_conference_inner {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    .at_conference_visual {
        min-height: 240px;
    }
    .at_conference_copy h2 {
        font-size: 2.3rem;
    }
    .at_hero {
        padding: 150px 20px 90px;
    }
    .at_section_heading {
        font-size: 2.2rem;
    }
}