:root {
    --ink: #14213d;
    --ink-soft: #61708a;
    --paper: #ffffff;
    --canvas: #f6f8fe;
    --surface: rgba(255, 255, 255, 0.82);
    --line: #dce4f2;
    --brand: #2f67f6;
    --brand-strong: #1d46d8;
    --brand-soft: #eaf0ff;
    --title-gradient-start: #2f67f6;
    --title-gradient-end: #8a4ff7;
    --title-gradient-glow: #22c4ff;
    --shadow-xs: 0 6px 18px rgba(25, 49, 95, 0.06);
    --shadow-md: 0 20px 60px rgba(25, 49, 95, 0.12);
    --cta-bg: #14213d;
    --cta-text: #ffffff;
    --cta-muted: rgba(255, 255, 255, 0.74);
    --radius-sm: 16px;
    --radius-md: 24px;
    --radius-lg: 36px;
}

[data-theme="dark"] {
    --ink: #f3f6ff;
    --ink-soft: #aebbd4;
    --paper: #10182e;
    --canvas: #080d1a;
    --surface: rgba(18, 29, 55, 0.9);
    --line: #273657;
    --brand: #79a0ff;
    --brand-strong: #a69aff;
    --brand-soft: #1b2c55;
    --title-gradient-start: #8baaff;
    --title-gradient-end: #c3a1ff;
    --title-gradient-glow: #55d6ff;
    --shadow-xs: 0 8px 20px rgba(0, 0, 0, 0.22);
    --shadow-md: 0 26px 70px rgba(0, 0, 0, 0.38);
    --cta-bg: #17264b;
    --cta-text: #ffffff;
    --cta-muted: rgba(255, 255, 255, 0.76);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    min-width: 320px;
    overflow-x: hidden;
    background: var(--canvas);
    color: var(--ink);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    font-size: 16px;
    line-height: 1.5;
    transition: background-color 0.25s ease, color 0.25s ease;
}
body::before,
body::after {
    content: "";
    position: fixed;
    z-index: -1;
    width: 44vw;
    height: 44vw;
    max-width: 640px;
    max-height: 640px;
    border-radius: 999px;
    filter: blur(18px);
    opacity: 0.55;
    pointer-events: none;
}
body::before { top: -24vw; right: -19vw; background: #cfe1ff; }
body::after { bottom: -26vw; left: -24vw; background: #ebe0ff; }
[data-theme="dark"] body::before { background: #1a2c55; }
[data-theme="dark"] body::after { background: #2d1f52; }

button, input { font: inherit; }
button { border: 0; }
a { color: inherit; }
svg { display: block; }

/* Auth */
.auth-modal {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: grid;
    place-items: center;
    padding: 24px;
    background: rgba(13, 24, 54, 0.42);
    backdrop-filter: blur(14px);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.24s ease, visibility 0.24s ease;
}
.auth-modal.active { opacity: 1; visibility: visible; }
.auth-container {
    width: min(100%, 484px);
    padding: clamp(28px, 5vw, 48px);
    border: 1px solid rgba(255, 255, 255, 0.58);
    border-radius: 30px;
    background: var(--paper);
    box-shadow: var(--shadow-md);
    transform: translateY(12px) scale(0.98);
    transition: transform 0.24s ease;
}
.auth-modal.active .auth-container { transform: translateY(0) scale(1); }
.auth-title { margin: 0 0 30px; font-size: clamp(28px, 4vw, 38px); line-height: 1.1; letter-spacing: -0.045em; }
.form-group { position: relative; margin: 0 0 20px; }
.form-label { display: block; margin: 0 0 8px; color: var(--ink-soft); font-size: 13px; font-weight: 700; letter-spacing: 0.02em; }
.form-input {
    width: 100%;
    min-height: 52px;
    padding: 0 15px;
    border: 1px solid var(--line);
    border-radius: 13px;
    background: color-mix(in srgb, var(--paper) 92%, var(--canvas));
    color: var(--ink);
    outline: none;
    transition: border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}
.form-input:focus { border-color: var(--brand); box-shadow: 0 0 0 4px color-mix(in srgb, var(--brand) 14%, transparent); background: var(--paper); }
.suggestions-list {
    position: absolute;
    top: calc(100% + 7px);
    right: 0;
    left: 0;
    z-index: 50;
    display: none;
    max-height: 230px;
    overflow: auto;
    border: 1px solid var(--line);
    border-radius: 14px;
    background: var(--paper);
    box-shadow: var(--shadow-md);
}
.suggestions-list.active { display: block; }
.suggestion-item { padding: 12px 14px; cursor: pointer; }
.suggestion-item + .suggestion-item { border-top: 1px solid var(--line); }
.suggestion-item:hover { background: var(--brand-soft); }
.checkbox-group { display: flex; gap: 10px; align-items: flex-start; margin: 20px 0 24px; }
.checkbox-custom { flex: 0 0 20px; width: 20px; height: 20px; margin-top: 1px; border: 1.5px solid var(--brand); border-radius: 7px; cursor: pointer; }
.checkbox-custom.checked { display: grid; place-items: center; background: var(--brand); }
.checkbox-custom.checked::after { content: "✓"; color: white; font-size: 13px; font-weight: 900; }
.checkbox-label { color: var(--ink-soft); font-size: 12px; line-height: 1.45; }
.privacy-link { color: var(--brand); font-weight: 700; cursor: pointer; }
.btn-primary, .btn-chat, .btn-chatbot-start, .btn-download-presentation, .btn-download-chat {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 9px;
    min-height: 48px;
    padding: 0 18px;
    border-radius: 13px;
    background: var(--brand);
    color: #fff;
    font-weight: 800;
    text-decoration: none;
    cursor: pointer;
    box-shadow: 0 9px 20px rgba(47, 103, 246, 0.18);
    transition: transform 0.18s ease, background 0.18s ease, box-shadow 0.18s ease;
}
.btn-primary { width: 100%; }
.btn-primary:hover, .btn-chat:hover, .btn-chatbot-start:hover, .btn-download-presentation:hover, .btn-download-chat:hover { transform: translateY(-2px); background: var(--brand-strong); box-shadow: 0 14px 28px rgba(47, 103, 246, 0.26); }
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

/* Page chrome */
.main-content { display: none; padding: 82px 24px 112px; }
.main-content.active { display: block; }
.header {
    position: fixed;
    top: 14px;
    left: 50%;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: min(calc(100% - 32px), 1180px);
    min-height: 54px;
    padding: 7px 8px 7px 18px;
    border: 1px solid color-mix(in srgb, var(--line) 78%, transparent);
    border-radius: 18px;
    background: color-mix(in srgb, var(--paper) 80%, transparent);
    box-shadow: var(--shadow-xs);
    backdrop-filter: blur(16px);
    transform: translateX(-50%);
}
.top-nav { display: flex; gap: 2px; align-items: center; }
.nav-item { padding: 8px 10px; border-radius: 10px; color: var(--ink-soft); font-size: 13px; font-weight: 750; text-decoration: none; transition: color 0.18s ease, background 0.18s ease; }
.nav-item:hover { color: var(--brand); background: var(--brand-soft); }
.theme-toggle { display: grid; place-items: center; width: 38px; height: 38px; border-radius: 12px; background: transparent; color: var(--ink); cursor: pointer; }
.theme-toggle:hover { background: var(--brand-soft); }
.theme-icon { width: 19px; height: 19px; fill: currentColor; }
.theme-icon.sun { display: none; }
[data-theme="dark"] .theme-icon.moon { display: none; }
[data-theme="dark"] .theme-icon.sun { display: block; }

/* Hero */
.hero {
    position: relative;
    overflow: hidden;
    width: min(100%, 1180px);
    min-height: 490px;
    margin: 0 auto 46px;
    padding: clamp(48px, 8vw, 105px) clamp(24px, 8vw, 100px);
    border: 1px solid color-mix(in srgb, var(--line) 85%, transparent);
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, color-mix(in srgb, var(--paper) 88%, var(--brand-soft)) 0%, var(--paper) 60%);
    box-shadow: var(--shadow-md);
}
.hero::before {
    content: "";
    position: absolute;
    top: -115px;
    right: -90px;
    width: 310px;
    height: 310px;
    border: 54px solid color-mix(in srgb, var(--brand) 14%, transparent);
    border-radius: 50%;
}
.hero::after {
    content: "";
    position: absolute;
    right: 9%;
    bottom: 17%;
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--brand);
    box-shadow: 28px 20px 0 color-mix(in srgb, var(--brand) 48%, transparent), 56px -9px 0 color-mix(in srgb, var(--brand) 28%, transparent), -22px 36px 0 color-mix(in srgb, var(--brand) 35%, transparent);
}
.digital-day-tag, .eyebrow {
    display: inline-flex;
    align-items: center;
    min-height: 30px;
    margin: 0 0 18px;
    padding: 0 11px;
    border: 1px solid color-mix(in srgb, var(--brand) 26%, transparent);
    border-radius: 999px;
    background: color-mix(in srgb, var(--brand-soft) 78%, transparent);
    color: var(--brand);
    font-size: 11px;
    font-weight: 850;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}
.event-title-gradient {
    position: relative;
    z-index: 1;
    max-width: 800px;
    margin: 0;
    background: linear-gradient(90deg, var(--title-gradient-start) 0%, var(--title-gradient-end) 52%, var(--title-gradient-glow) 100%);
    background-size: 160% 100%;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: var(--ink);
    font-size: clamp(48px, 8.2vw, 105px);
    font-weight: 850;
    letter-spacing: -0.075em;
    line-height: 0.92;
    animation: title-gradient-shift 7s ease-in-out infinite alternate;
}
@keyframes title-gradient-shift { from { background-position: 0% 50%; } to { background-position: 100% 50%; } }

.event-location-box {
    position: relative;
    z-index: 1;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    min-height: 42px;
    margin: 28px 0 0;
    padding: 0 14px;
    border: 1px solid color-mix(in srgb, var(--brand) 32%, var(--line));
    border-radius: 999px;
    background: color-mix(in srgb, var(--brand-soft) 74%, var(--paper));
    color: var(--brand);
    font-size: 16px;
    font-weight: 800;
    box-shadow: 0 6px 16px color-mix(in srgb, var(--brand) 10%, transparent);
}
.location-icon { width: 18px; height: 18px; fill: currentColor; }
.event-description { position: relative; z-index: 1; max-width: 600px; margin: 19px 0 0; color: var(--ink-soft); font-size: clamp(16px, 2vw, 20px); line-height: 1.48; }
.btn-chat { position: relative; z-index: 1; margin-top: 32px; }
.chat-btn-icon, .download-icon { width: 18px; height: 18px; fill: currentColor; }

/* Section layout */
.section { width: min(100%, 1180px); margin: 0 auto 72px; scroll-margin-top: 94px; }
.section-title { max-width: 760px; margin: 0; font-size: clamp(32px, 5vw, 52px); line-height: 1; letter-spacing: -0.055em; }
.section-subtitle { max-width: 560px; margin: 13px 0 28px; color: var(--ink-soft); font-size: 16px; }
.section-heading-row { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 28px; }
.section-heading-row .section-subtitle { max-width: 285px; margin: 0; }
.reveal-on-scroll { opacity: 0; transform: translateY(12px); transition: opacity 0.45s ease, transform 0.45s ease; }
.reveal-on-scroll.visible { opacity: 1; transform: none; }

/* Program */
.schedule-item {
    display: grid;
    grid-template-columns: 165px 1fr;
    gap: 16px 28px;
    margin-top: 12px;
    padding: 25px 28px;
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    background: var(--surface);
    box-shadow: var(--shadow-xs);
    transition: transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
    backdrop-filter: blur(8px);
}
.schedule-item:hover { transform: translateY(-3px); border-color: color-mix(in srgb, var(--brand) 45%, var(--line)); box-shadow: var(--shadow-md); }
.schedule-time-box {
    display: inline-flex;
    align-items: center;
    align-self: start;
    gap: 8px;
    min-height: 38px;
    padding: 0 11px;
    border: 1px solid color-mix(in srgb, var(--brand) 28%, var(--line));
    border-radius: 12px;
    background: color-mix(in srgb, var(--brand-soft) 66%, var(--paper));
    color: var(--brand);
    font-size: 14px;
    font-weight: 850;
    white-space: nowrap;
}
.time-icon { width: 17px; height: 17px; fill: currentColor; }
.schedule-title { align-self: center; max-width: 700px; color: var(--ink); font-size: clamp(18px, 2.5vw, 23px); font-weight: 760; letter-spacing: -0.025em; line-height: 1.23; }
.schedule-speaker-wrapper { grid-column: 2; display: flex; gap: 11px; align-items: flex-start; margin-top: -4px; }
.speaker-icon { flex: 0 0 auto; width: 18px; height: 18px; margin-top: 2px; fill: var(--brand); }
.schedule-speaker-name { color: var(--ink); font-weight: 800; }
.schedule-speaker-role { margin-top: 1px; color: var(--ink-soft); font-size: 13px; line-height: 1.4; }

/* Industry materials */
.industry-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; }
.industry-card {
    position: relative;
    display: flex;
    flex-direction: column;
    min-height: 192px;
    padding: 21px;
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    background: var(--paper);
    box-shadow: var(--shadow-xs);
    transition: transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
}
.industry-card:hover { transform: translateY(-4px); border-color: color-mix(in srgb, var(--brand) 42%, var(--line)); box-shadow: var(--shadow-md); }
.industry-icon { width: 27px; height: 27px; margin-bottom: auto; fill: var(--brand); }
.industry-content-wrapper { padding-right: 28px; }
.industry-name { color: var(--ink); font-size: 18px; font-weight: 820; letter-spacing: -0.025em; }
.industry-description { margin-top: 6px; color: var(--ink-soft); font-size: 12.5px; line-height: 1.4; }
.btn-download-corner {
    position: absolute;
    right: 16px;
    bottom: 16px;
    display: grid;
    place-items: center;
    width: 34px;
    height: 34px;
    border: 1px solid var(--line);
    border-radius: 11px;
    color: var(--brand);
    text-decoration: none;
    transition: background 0.18s ease, color 0.18s ease, transform 0.18s ease;
}
.btn-download-corner:hover { transform: translateY(-2px); background: var(--brand); color: #fff; }
.btn-download-corner .download-icon { width: 17px; height: 17px; }

/* Speaker materials */
.presentations-section { padding-top: 2px; }
.presentations-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
.presentation-card {
    display: flex;
    flex-direction: column;
    min-height: 288px;
    padding: 21px;
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    background: var(--paper);
    box-shadow: var(--shadow-xs);
    transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}
.presentation-card:hover { transform: translateY(-4px); border-color: color-mix(in srgb, var(--brand) 40%, var(--line)); box-shadow: var(--shadow-md); }
.featured-presentation { border-color: color-mix(in srgb, var(--brand) 44%, var(--line)); background: linear-gradient(150deg, color-mix(in srgb, var(--brand-soft) 70%, var(--paper)) 0%, var(--paper) 55%); }
.presentation-card-top { display: flex; align-items: center; justify-content: space-between; color: var(--ink-soft); font-size: 11px; font-weight: 850; letter-spacing: 0.06em; text-transform: uppercase; }
.presentation-number { color: var(--brand); }
.presentation-format { padding: 4px 7px; border-radius: 7px; background: var(--brand-soft); color: var(--brand); }
.presentation-speaker-icon { width: 27px; height: 27px; margin: 28px 0 16px; fill: var(--brand); }
.presentation-name { margin: 0; color: var(--ink); font-size: 22px; line-height: 1.1; letter-spacing: -0.035em; }
.presentation-topic { flex: 1; margin: 9px 0 22px; color: var(--ink-soft); font-size: 13px; line-height: 1.4; }
.btn-download-presentation { align-self: flex-start; min-height: 42px; padding: 0 13px; border-radius: 999px; font-size: 13px; }
.presentation-coming-soon {
    display: inline-flex;
    align-items: center;
    align-self: flex-start;
    min-height: 38px;
    padding: 0 13px;
    border: 1px solid color-mix(in srgb, var(--brand) 24%, var(--line));
    border-radius: 999px;
    background: color-mix(in srgb, var(--brand-soft) 74%, var(--paper));
    color: var(--brand);
    font-size: 12px;
    font-weight: 800;
}
.materials-note { max-width: 740px; margin: 18px 0 0; color: var(--ink-soft); font-size: 13px; }
.materials-status-card { padding: 30px; border: 1px solid var(--line); border-radius: var(--radius-md); background: var(--paper); text-align: center; box-shadow: var(--shadow-xs); }
.materials-status-card .presentation-speaker-icon { margin: 0 auto 12px; }
.materials-status-title { font-size: 19px; font-weight: 800; }
.presentation-status { margin-top: 6px; color: var(--ink-soft); font-size: 13px; }

/* Chat CTA / floating controls */
.chatbot-cta-section {
    width: min(100%, 1180px);
    margin: 0 auto;
    padding: clamp(35px, 6vw, 70px);
    border: 1px solid color-mix(in srgb, var(--cta-bg) 82%, var(--line));
    border-radius: var(--radius-lg);
    background: var(--cta-bg);
    color: var(--cta-text);
    box-shadow: var(--shadow-md);
}
.chatbot-cta-title { max-width: 700px; margin: 0; color: var(--cta-text); font-size: clamp(30px, 4.5vw, 50px); line-height: 1; letter-spacing: -0.055em; }
.chatbot-cta-text { margin: 15px 0 25px; color: var(--cta-muted); font-size: 16px; }
.btn-chatbot-start { background: #fff; color: #14213d; box-shadow: none; }
.btn-chatbot-start:hover { background: var(--brand); color: #fff; }
.chat-button-fixed, .scroll-top, .scroll-bottom-arrow {
    position: fixed;
    z-index: 90;
    display: grid;
    place-items: center;
    width: 50px;
    height: 50px;
    border: 1px solid var(--line);
    border-radius: 16px;
    background: var(--paper);
    color: var(--brand);
    box-shadow: var(--shadow-md);
    cursor: pointer;
    transition: transform 0.18s ease, background 0.18s ease, color 0.18s ease;
}
.chat-button-fixed { right: 23px; bottom: 24px; width: 56px; height: 56px; background: var(--brand); color: #fff; border-color: transparent; }
.scroll-top { right: 23px; bottom: 92px; }
.scroll-bottom-arrow { left: 23px; bottom: 24px; }
.chat-button-fixed:hover, .scroll-top:hover, .scroll-bottom-arrow:hover { transform: translateY(-3px); background: var(--brand); color: #fff; }
.chat-icon, .scroll-top svg, .scroll-bottom-arrow svg { width: 22px; height: 22px; fill: currentColor; }
.bottom-nav { display: none; }

/* Chat modal */
.chat-modal {
    position: fixed;
    right: 22px;
    bottom: 22px;
    z-index: 200;
    display: none;
    grid-template-rows: auto minmax(0, 1fr) auto auto;
    width: min(420px, calc(100vw - 28px));
    height: min(660px, calc(100vh - 44px));
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: 32px;
    background: var(--paper);
    box-shadow: 0 28px 80px rgba(16, 30, 68, 0.28);
}
.chat-modal.active { display: grid; animation: chat-in 0.2s ease both; }
@keyframes chat-in { from { opacity: 0; transform: translateY(12px) scale(0.98); } to { opacity: 1; transform: none; } }
@keyframes chat-content-in { from { opacity: 0; transform: translateY(10px) scale(0.985); } to { opacity: 1; transform: translateY(0) scale(1); } }
.chat-header { display: flex; align-items: center; justify-content: space-between; padding: 19px 18px; border-bottom: 1px solid var(--line); }
.chat-title { margin: 0; font-size: 17px; letter-spacing: -0.025em; }
.chat-close { display: grid; place-items: center; width: 34px; height: 34px; border-radius: 999px; background: var(--brand-soft); color: var(--brand); font-size: 22px; line-height: 1; cursor: pointer; }
.chat-messages { min-height: 0; padding: 16px; overflow-y: auto; background: color-mix(in srgb, var(--canvas) 70%, var(--paper)); }
.chat-enter { animation: chat-content-in 0.34s cubic-bezier(.2,.8,.2,1) both; }
.message { max-width: 93%; margin: 0 0 10px; padding: 12px 14px; border-radius: 22px; font-size: 13px; line-height: 1.45; }
.message.bot, .info-block { border: 1px solid var(--line); border-bottom-left-radius: 9px; background: var(--paper); color: var(--ink); }
.message.user { margin-left: auto; border-bottom-right-radius: 9px; background: var(--brand); color: #fff; }
.schedule-chat-block, .speaker-chat-block, .csm-chat-card, .industry-download-block, .speaker-download-block { max-width: 100%; }
.schedule-chat-time-box { display: flex; gap: 7px; align-items: center; color: var(--brand); font-size: 12px; font-weight: 850; }
.schedule-chat-title { margin: 6px 0 10px; font-weight: 800; }
.schedule-chat-speaker-wrapper { display: flex; gap: 8px; margin-top: 8px; }
.schedule-chat-speaker-info, .speaker-chat-block { min-width: 0; }
.schedule-chat-speaker-name, .speaker-chat-name { font-weight: 800; }
.schedule-chat-speaker-role { color: var(--ink-soft); font-size: 12px; }
.speaker-chat-block { display: grid; grid-template-columns: 34px minmax(0, 1fr); gap: 10px; align-items: start; }
.speaker-chat-details { min-width: 0; }
.speaker-chat-name { margin-bottom: 7px; }
.speaker-chat-meta { display: grid; gap: 5px; }
.speaker-chat-meta-row { display: grid; grid-template-columns: 62px minmax(0, 1fr); gap: 8px; align-items: baseline; }
.speaker-chat-meta-label { color: var(--ink-soft); font-size: 11px; font-weight: 700; }
.speaker-chat-meta-value { color: var(--ink); font-size: 12px; font-weight: 650; line-height: 1.36; }
.speaker-chat-icon-wrapper { display: grid; place-items: center; width: 34px; height: 34px; border-radius: 12px; background: var(--brand-soft); }
.speaker-chat-icon { width: 16px; height: 16px; fill: var(--brand); }
.csm-chat-title, .industry-download-title, .speaker-download-name { margin-bottom: 9px; font-weight: 850; }
.csm-chat-row { display: grid; grid-template-columns: 87px 1fr; gap: 7px; padding: 6px 0; border-top: 1px solid var(--line); font-size: 12px; }
.csm-chat-label { color: var(--ink-soft); }
.csm-chat-value { overflow-wrap: anywhere; font-weight: 700; }
.chat-scenarios, .industry-buttons-container, .speaker-buttons-container { display: flex; flex-wrap: wrap; gap: 8px; padding: 10px 14px; border-top: 1px solid var(--line); background: var(--paper); }
.scenario-btn { min-height: 38px; padding: 0 14px; border: 1px solid var(--line); border-radius: 999px; background: transparent; color: var(--ink-soft); font-size: 12px; font-weight: 750; cursor: pointer; transition: background 0.16s ease, color 0.16s ease, border-color 0.16s ease; }
.scenario-btn:hover { border-color: var(--brand); background: var(--brand-soft); color: var(--brand); }
.btn-download-chat { min-height: 38px; padding: 0 13px; border-radius: 999px; font-size: 12px; }
.chat-input-area { display: flex; gap: 9px; padding: 11px 14px 14px; border-top: 1px solid var(--line); background: var(--paper); }
.chat-input { flex: 1; min-width: 0; height: 44px; padding: 0 15px; border: 1px solid var(--line); border-radius: 999px; background: var(--canvas); color: var(--ink); outline: none; }
.chat-input:focus { border-color: var(--brand); box-shadow: 0 0 0 3px color-mix(in srgb, var(--brand) 13%, transparent); }
.btn-send { display: grid; place-items: center; flex: 0 0 44px; width: 44px; height: 44px; border-radius: 999px; background: var(--brand); color: #fff; cursor: pointer; }
.btn-send:hover { background: var(--brand-strong); }
.btn-send svg { width: 19px; height: 19px; fill: currentColor; }
.back-button { min-height: 34px; margin: 0 0 10px; padding: 0 12px; border-radius: 999px; background: var(--brand-soft); color: var(--brand); font-size: 12px; font-weight: 800; cursor: pointer; }
.loading { display: inline-flex; align-items: center; gap: 6px; color: var(--ink-soft); font-size: 12px; }
.loading::before { content: ""; width: 12px; height: 12px; border: 2px solid var(--line); border-top-color: var(--brand); border-radius: 50%; animation: spin 0.8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

@media (max-width: 920px) {
    .industry-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .presentations-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 640px) {
    .main-content { padding: 76px 14px 94px; }
    .header { top: 8px; width: calc(100% - 20px); min-height: 48px; padding: 5px 5px 5px 9px; border-radius: 15px; }
    .nav-item { padding: 7px 7px; font-size: 11px; }
    .theme-toggle { width: 35px; height: 35px; }
    .hero { min-height: 455px; margin-bottom: 38px; padding: 54px 24px; border-radius: 26px; }
    .hero::before { top: -135px; right: -130px; }
    .event-title-gradient { font-size: clamp(46px, 15vw, 72px); }
    .section { margin-bottom: 50px; }
    .section-heading-row { display: block; }
    .section-heading-row .section-subtitle { margin: 12px 0 0; }
    .schedule-item { grid-template-columns: 1fr; gap: 10px; padding: 20px; border-radius: 18px; }
    .schedule-speaker-wrapper { grid-column: 1; }
    .industry-grid, .presentations-grid { grid-template-columns: 1fr; }
    .industry-card { min-height: 160px; }
    .presentation-card { min-height: 250px; }
    .chatbot-cta-section { border-radius: 26px; }
    .scroll-top { display: none; }
    .scroll-bottom-arrow { left: 14px; bottom: 15px; width: 45px; height: 45px; }
    .chat-button-fixed { right: 14px; bottom: 15px; width: 52px; height: 52px; }
    .chat-modal { right: 10px; bottom: 10px; width: calc(100vw - 20px); height: min(680px, calc(100vh - 20px)); border-radius: 22px; }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; scroll-behavior: auto !important; }
}


/* Refined entrance and theme transition */
html.theme-transitioning,
html.theme-transitioning body {
    transition: background-color 480ms cubic-bezier(.2,.8,.2,1), color 360ms ease !important;
}
html.theme-transitioning body::before,
html.theme-transitioning body::after,
html.theme-transitioning .auth-modal,
html.theme-transitioning .auth-container,
html.theme-transitioning .auth-brand-panel,
html.theme-transitioning .auth-form-heading,
html.theme-transitioning .form-input,
html.theme-transitioning .suggestions-list,
html.theme-transitioning .header,
html.theme-transitioning .hero,
html.theme-transitioning .section,
html.theme-transitioning .schedule-item,
html.theme-transitioning .industry-card,
html.theme-transitioning .presentation-card,
html.theme-transitioning .chatbot-cta-section,
html.theme-transitioning .chat-modal,
html.theme-transitioning .chat-header,
html.theme-transitioning .chat-messages,
html.theme-transitioning .chat-scenarios,
html.theme-transitioning .chat-input-area,
html.theme-transitioning .message.bot,
html.theme-transitioning .info-block,
html.theme-transitioning .scenario-btn,
html.theme-transitioning .theme-toggle {
    transition-duration: 460ms !important;
    transition-timing-function: cubic-bezier(.2,.8,.2,1) !important;
}

.auth-modal {
    padding: max(20px, env(safe-area-inset-top)) 24px max(20px, env(safe-area-inset-bottom));
    background:
        radial-gradient(circle at 14% 12%, color-mix(in srgb, var(--title-gradient-glow) 24%, transparent), transparent 31%),
        radial-gradient(circle at 88% 82%, color-mix(in srgb, var(--title-gradient-end) 22%, transparent), transparent 32%),
        rgba(9, 18, 43, 0.56);
    backdrop-filter: blur(20px) saturate(125%);
    transition: opacity 360ms ease, visibility 360ms ease, background-color 460ms cubic-bezier(.2,.8,.2,1);
}
.auth-shell {
    display: grid;
    grid-template-columns: minmax(230px, .86fr) minmax(370px, 1.14fr);
    width: min(100%, 920px);
    min-height: 548px;
    overflow: hidden;
    border: 1px solid color-mix(in srgb, var(--paper) 56%, transparent);
    border-radius: 32px;
    background: color-mix(in srgb, var(--paper) 93%, transparent);
    box-shadow: 0 34px 96px rgba(8, 17, 43, 0.32);
    transform: translateY(18px) scale(.985);
    transition: transform 420ms cubic-bezier(.2,.85,.2,1), background-color 460ms cubic-bezier(.2,.8,.2,1), border-color 460ms cubic-bezier(.2,.8,.2,1), box-shadow 460ms cubic-bezier(.2,.8,.2,1);
}
.auth-modal.active .auth-shell { transform: translateY(0) scale(1); }
.auth-container {
    display: flex;
    flex-direction: column;
    justify-content: center;
    width: auto;
    min-width: 0;
    padding: clamp(32px, 5vw, 58px);
    border: 0;
    border-radius: 0;
    background: var(--paper);
    box-shadow: none;
    transform: none;
}
.auth-modal.active .auth-container { transform: none; }
.auth-brand-panel {
    position: relative;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    padding: clamp(30px, 5vw, 54px);
    color: #fff;
    background:
        radial-gradient(circle at 20% 14%, rgba(101, 198, 255, .44), transparent 29%),
        radial-gradient(circle at 89% 87%, rgba(180, 118, 255, .5), transparent 37%),
        linear-gradient(145deg, #1c3fc6 0%, #5835ca 56%, #7d3ac4 100%);
    isolation: isolate;
}
.auth-brand-panel::before,
.auth-brand-panel::after {
    content: "";
    position: absolute;
    z-index: -1;
    border: 1px solid rgba(255,255,255,.22);
    border-radius: 50%;
}
.auth-brand-panel::before { width: 340px; height: 340px; right: -180px; bottom: -162px; }
.auth-brand-panel::after { width: 174px; height: 174px; left: -104px; top: 42%; }
.auth-brand-mark {
    display: inline-flex;
    align-items: flex-end;
    gap: 4px;
    width: max-content;
    height: 30px;
    margin: 0 0 40px;
    padding: 7px;
    border: 1px solid rgba(255,255,255,.32);
    border-radius: 11px;
    background: rgba(255,255,255,.12);
    backdrop-filter: blur(10px);
}
.auth-brand-mark span { display: block; width: 5px; border-radius: 999px; background: #fff; }
.auth-brand-mark span:nth-child(1) { height: 8px; opacity: .72; }
.auth-brand-mark span:nth-child(2) { height: 15px; opacity: .88; }
.auth-brand-mark span:nth-child(3) { height: 21px; }
.auth-eyebrow,
.auth-kicker {
    display: inline-flex;
    width: fit-content;
    margin: 0 0 14px;
    font-size: 11px;
    font-weight: 850;
    letter-spacing: .09em;
    text-transform: uppercase;
}
.auth-eyebrow { color: rgba(255,255,255,.78); }
.auth-kicker { color: var(--brand); }
.auth-brand-title {
    max-width: 300px;
    margin: 0;
    color: #fff;
    font-size: clamp(44px, 5.7vw, 72px);
    font-weight: 860;
    letter-spacing: -.07em;
    line-height: .89;
}
.auth-brand-title span { display: block; color: rgba(255,255,255,.72); font-size: .54em; letter-spacing: -.055em; }
.auth-brand-text { max-width: 310px; margin: 24px 0 0; color: rgba(255,255,255,.78); font-size: 14px; line-height: 1.5; }
.auth-brand-pills { display: flex; flex-wrap: wrap; gap: 7px; margin-top: auto; padding-top: 32px; }
.auth-brand-pills span { padding: 7px 10px; border: 1px solid rgba(255,255,255,.22); border-radius: 999px; background: rgba(255,255,255,.10); color: rgba(255,255,255,.86); font-size: 11px; font-weight: 750; backdrop-filter: blur(8px); }
.auth-form-heading { margin-bottom: 30px; }
.auth-title { margin: 0; color: var(--ink); font-size: clamp(31px, 4vw, 42px); font-weight: 840; letter-spacing: -.052em; line-height: 1; }
.auth-lead { max-width: 390px; margin: 13px 0 0; color: var(--ink-soft); font-size: 14px; line-height: 1.5; }
.form-group { margin-bottom: 19px; }
.form-label { margin-bottom: 9px; color: var(--ink); font-size: 12px; font-weight: 780; letter-spacing: .01em; }
.form-input { min-height: 54px; padding: 0 16px; border-radius: 16px; background: color-mix(in srgb, var(--canvas) 76%, var(--paper)); }
.form-input::placeholder { color: color-mix(in srgb, var(--ink-soft) 75%, transparent); }
.form-input:focus { border-color: var(--brand); box-shadow: 0 0 0 5px color-mix(in srgb, var(--brand) 13%, transparent); }
.suggestions-list { border-radius: 16px; }
.suggestion-item { padding: 13px 15px; }
.checkbox-group { gap: 11px; margin: 21px 0 24px; }
.checkbox-custom { flex-basis: 21px; width: 21px; height: 21px; margin-top: 0; padding: 0; border: 1.5px solid var(--brand); border-radius: 8px; background: transparent; transition: background-color .2s ease, transform .2s ease, box-shadow .2s ease; }
.checkbox-custom:hover { box-shadow: 0 0 0 4px color-mix(in srgb, var(--brand) 12%, transparent); }
.checkbox-custom.checked { background: var(--brand); transform: scale(1.03); }
.checkbox-label { padding-top: 1px; font-size: 12px; }
.btn-primary { min-height: 54px; border-radius: 16px; background: linear-gradient(100deg, var(--brand), var(--title-gradient-end)); box-shadow: 0 13px 26px color-mix(in srgb, var(--brand) 25%, transparent); }
.btn-primary svg { width: 18px; height: 18px; fill: currentColor; transition: transform .2s ease; }
.btn-primary:hover svg { transform: translateX(3px); }
.auth-footnote { margin: 17px 0 0; color: var(--ink-soft); font-size: 11px; line-height: 1.45; }
.theme-toggle { position: relative; overflow: hidden; transition: background-color .25s ease, color .25s ease, transform .25s ease; }
.theme-toggle:hover { transform: translateY(-1px); }
.theme-icon { position: absolute; transition: opacity 300ms ease, transform 360ms cubic-bezier(.2,.8,.2,1); }
.theme-icon.moon { opacity: 1; transform: rotate(0) scale(1); }
.theme-icon.sun { display: block; opacity: 0; transform: rotate(-70deg) scale(.55); }
[data-theme="dark"] .theme-icon.moon { display: block; opacity: 0; transform: rotate(70deg) scale(.55); }
[data-theme="dark"] .theme-icon.sun { display: block; opacity: 1; transform: rotate(0) scale(1); }

@media (max-width: 720px) {
    .auth-modal { align-items: end; padding: 12px; }
    .auth-shell { display: block; width: min(100%, 540px); min-height: 0; max-height: calc(100dvh - 24px); overflow: auto; border-radius: 27px; }
    .auth-brand-panel { min-height: 190px; padding: 25px 26px; }
    .auth-brand-mark { margin-bottom: 24px; }
    .auth-brand-title { max-width: none; font-size: 45px; }
    .auth-brand-title span { display: inline; margin-left: 6px; }
    .auth-brand-text { max-width: 430px; margin-top: 15px; font-size: 13px; }
    .auth-brand-pills { display: none; }
    .auth-container { padding: 28px 25px 26px; }
    .auth-form-heading { margin-bottom: 24px; }
    .auth-title { font-size: 32px; }
}
@media (max-width: 390px) {
    .auth-brand-panel { min-height: 170px; padding: 22px; }
    .auth-brand-mark { margin-bottom: 16px; }
    .auth-brand-title { font-size: 40px; }
    .auth-brand-text { display: none; }
    .auth-container { padding: 24px 20px; }
    .auth-footnote { display: none; }
}


/* Minimal access screen and mobile return control — 2026-06-22 */
.auth-shell.auth-shell-minimal {
    display: block;
    width: min(100%, 460px);
    min-height: 0;
    border: 1px solid color-mix(in srgb, var(--paper) 62%, transparent);
    border-radius: 28px;
    background: color-mix(in srgb, var(--paper) 96%, transparent);
    box-shadow: 0 28px 88px rgba(8, 17, 43, 0.30);
}
.auth-shell-minimal .auth-container {
    display: block;
    width: auto;
    padding: clamp(30px, 6vw, 42px);
    border: 0;
    border-radius: 28px;
    background: transparent;
    box-shadow: none;
}
.auth-topline {
    display: flex;
    align-items: center;
    gap: 9px;
    margin-bottom: 31px;
    color: var(--ink-soft);
    font-size: 12px;
    font-weight: 760;
    letter-spacing: .01em;
}
.auth-topline b { color: var(--brand); font-weight: 900; }
.auth-wordmark {
    display: inline-flex;
    align-items: flex-end;
    gap: 3px;
    width: 25px;
    height: 25px;
    padding: 5px;
    border-radius: 9px;
    background: linear-gradient(145deg, var(--brand), var(--title-gradient-end));
    box-shadow: 0 8px 18px color-mix(in srgb, var(--brand) 26%, transparent);
}
.auth-wordmark i { display: block; width: 3px; border-radius: 999px; background: #fff; }
.auth-wordmark i:nth-child(1) { height: 6px; opacity: .7; }
.auth-wordmark i:nth-child(2) { height: 10px; opacity: .85; }
.auth-wordmark i:nth-child(3) { height: 14px; }
.auth-shell-minimal .auth-form-heading { margin-bottom: 27px; }
.auth-shell-minimal .auth-kicker {
    margin-bottom: 11px;
    padding: 6px 9px;
    border-radius: 999px;
    background: var(--brand-soft);
    color: var(--brand);
    font-size: 10px;
    letter-spacing: .065em;
}
.auth-shell-minimal .auth-title {
    font-size: clamp(30px, 8vw, 38px);
    letter-spacing: -.055em;
    line-height: 1.02;
}
.auth-shell-minimal .auth-lead { margin-top: 12px; font-size: 13px; }
.auth-shell-minimal .form-group { margin-bottom: 17px; }
.auth-shell-minimal .form-label { margin-bottom: 8px; color: var(--ink-soft); font-size: 11px; font-weight: 800; letter-spacing: .025em; text-transform: uppercase; }
.auth-shell-minimal .form-input { min-height: 52px; border-radius: 14px; background: color-mix(in srgb, var(--canvas) 78%, var(--paper)); }
.auth-shell-minimal .checkbox-group { margin: 19px 0 22px; }
.auth-shell-minimal .btn-primary { min-height: 52px; border-radius: 14px; box-shadow: 0 12px 24px color-mix(in srgb, var(--brand) 20%, transparent); }
.auth-shell-minimal .auth-footnote { margin-top: 15px; text-align: center; }

.scroll-top {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(10px);
    transition: opacity .22s ease, visibility .22s ease, transform .22s ease, background-color .18s ease, color .18s ease;
}
.scroll-top.visible {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateY(0);
}
.scroll-top-label { display: none; }

@media (max-width: 640px) {
    .auth-modal { align-items: center; padding: max(16px, env(safe-area-inset-top)) 16px max(16px, env(safe-area-inset-bottom)); }
    .auth-shell.auth-shell-minimal { width: min(100%, 430px); border-radius: 24px; }
    .auth-shell-minimal .auth-container { padding: 28px 22px 24px; border-radius: 24px; }
    .auth-topline { margin-bottom: 25px; }
    .auth-shell-minimal .auth-form-heading { margin-bottom: 23px; }
    .auth-shell-minimal .auth-title { font-size: 31px; }
    .auth-shell-minimal .auth-lead { font-size: 12.5px; }
    .auth-shell-minimal .form-input,
    .auth-shell-minimal .btn-primary { min-height: 50px; }
    .scroll-top {
        display: flex;
        right: 14px;
        bottom: calc(77px + env(safe-area-inset-bottom));
        width: auto;
        min-width: 54px;
        height: 50px;
        padding: 0 15px;
        border-color: color-mix(in srgb, var(--brand) 32%, var(--line));
        border-radius: 999px;
        background: var(--paper);
        color: var(--brand);
        box-shadow: 0 14px 30px rgba(16, 30, 68, .18);
    }
    .scroll-top:hover,
    .scroll-top:active { transform: translateY(-2px); background: var(--brand); color: #fff; }
    .scroll-top.visible { transform: translateY(0); }
    .scroll-top-label { display: inline; font-size: 12px; font-weight: 820; }
    .scroll-top svg { width: 18px; height: 18px; }
}

@media (max-width: 390px) {
    .auth-shell-minimal .auth-container { padding: 24px 20px 21px; }
    .auth-shell-minimal .auth-title { font-size: 29px; }
    .auth-shell-minimal .auth-footnote { display: block; }
}