/* =========================================================================
   K-MASTER 다국어 사이트 공통 스타일
   - 명인/명장/인간문화재 헤리티지 사이트에 어울리는 절제된 톤
   - 추후 디자인 파일 도입 시 토큰만 교체해도 전체 톤이 바뀌도록 구성
   ========================================================================= */

/* ---------- 디자인 토큰 ---------- */
:root {
    --color-bg: #fbfaf7;
    --color-surface: #ffffff;
    --color-surface-soft: #f5f3ee;
    --color-border: #e6e2d8;
    --color-border-strong: #c8c2b3;
    --color-text: #1f1d18;
    --color-text-soft: #57544c;
    --color-text-mute: #8a8678;
    --color-primary: #1a2236;     /* 깊은 남색 */
    --color-primary-2: #2c3450;
    --color-accent: #b48a3c;      /* 전통 금빛 */
    --color-accent-soft: #d9b06a;
    --color-danger: #a8302d;
    --color-success: #3d7a4a;

    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 14px;

    --shadow-sm: 0 1px 2px rgba(31, 29, 24, .06);
    --shadow-md: 0 6px 18px rgba(31, 29, 24, .08);

    --container-max: 1180px;
    --header-h: 68px;

    --font-serif: "Noto Serif KR", "Nanum Myeongjo", "Times New Roman", serif;
    --font-sans:  "Noto Sans KR", -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Helvetica Neue", Arial, sans-serif;
}

/* ---------- Reset & Base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
    margin: 0;
    font-family: var(--font-sans);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.65;
    font-size: 15px;
    -webkit-font-smoothing: antialiased;
}
img, svg { max-width: 100%; vertical-align: middle; }
a { color: var(--color-primary); text-decoration: none; }
a:hover { color: var(--color-accent); }

h1, h2, h3, h4 { font-family: var(--font-serif); font-weight: 700; color: var(--color-text); margin: 0; line-height: 1.3; }
h1 { font-size: 30px; }
h2 { font-size: 22px; }
h3 { font-size: 18px; }
p { margin: 0 0 12px; }

button { font-family: inherit; }
input, select, textarea { font-family: inherit; font-size: 15px; }

/* ---------- Layout ---------- */
.site-container { max-width: var(--container-max); margin: 0 auto; padding: 0 24px; }

.site-main { min-height: calc(100vh - var(--header-h) - 220px); padding: 32px 0 64px; }

/* ---------- Header ---------- */
.site-header {
    position: sticky; top: 0; z-index: 50;
    background: rgba(251, 250, 247, .96);
    backdrop-filter: saturate(140%) blur(8px);
    border-bottom: 1px solid var(--color-border);
}
.site-header__inner {
    height: var(--header-h);
    display: flex; align-items: center; justify-content: space-between; gap: 24px;
}
.site-brand {
    display: inline-flex; align-items: center; gap: 10px;
    font-family: var(--font-serif);
    font-size: 22px; font-weight: 800; letter-spacing: .02em;
    color: var(--color-primary);
}
.site-brand__mark {
    width: 28px; height: 28px; border-radius: 4px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    display: inline-block;
}
.site-nav { display: flex; align-items: center; gap: 4px; }
.site-nav a {
    padding: 8px 14px; border-radius: var(--radius-sm);
    color: var(--color-text-soft); font-weight: 500; font-size: 15px;
    transition: color .15s, background .15s;
}
.site-nav a:hover { color: var(--color-text); background: var(--color-surface-soft); }
.site-nav a.is-active { color: var(--color-primary); }
.site-nav__icon { font-size: 16px; }

.site-meta { display: flex; align-items: center; gap: 12px; font-size: 13px; }
.site-meta__user { color: var(--color-text-soft); }
.site-meta__link { color: var(--color-text-mute); }
.site-meta__link:hover { color: var(--color-text); }
.locale-switch { display: flex; gap: 6px; padding-left: 12px; border-left: 1px solid var(--color-border); }
.locale-switch a {
    color: var(--color-text-mute); font-size: 13px; padding: 2px 4px;
}
.locale-switch a.is-active { color: var(--color-primary); font-weight: 700; }

.nav-toggle {
    display: none;
    background: none; border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: 6px 10px; font-size: 18px; cursor: pointer; color: var(--color-text);
}

@media (max-width: 900px) {
    .nav-toggle { display: inline-flex; }
    .site-nav, .site-meta {
        position: absolute; top: var(--header-h); left: 0; right: 0;
        flex-direction: column; align-items: stretch; gap: 0;
        background: var(--color-surface);
        border-bottom: 1px solid var(--color-border);
        padding: 12px 24px;
        display: none;
    }
    .site-nav.is-open, .site-meta.is-open { display: flex; }
    .site-nav a { padding: 12px 6px; border-bottom: 1px solid var(--color-border); }
    .site-nav a:last-child { border-bottom: none; }
    .site-meta { padding: 12px 24px 16px; }
    .locale-switch { padding-left: 0; border-left: none; padding-top: 8px; border-top: 1px solid var(--color-border); margin-top: 4px; }
}

/* ---------- Footer ---------- */
.site-footer {
    border-top: 1px solid var(--color-border);
    background: var(--color-surface-soft);
    color: var(--color-text-mute);
    font-size: 13px;
    padding: 28px 0 36px;
    margin-top: 64px;
}
.site-footer__inner { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; align-items: center; }
.site-footer__copy { color: var(--color-text-soft); }

/* ---------- Hero ---------- */
.hero {
    padding: 56px 0 40px;
    border-bottom: 1px solid var(--color-border);
    margin-bottom: 40px;
}
.hero__eyebrow { color: var(--color-accent); font-size: 13px; font-weight: 700; letter-spacing: .15em; text-transform: uppercase; margin-bottom: 12px; }
.hero__title { font-size: 42px; line-height: 1.2; margin-bottom: 14px; }
.hero__subtitle { font-size: 17px; color: var(--color-text-soft); max-width: 720px; margin-bottom: 28px; }
.hero__actions { display: flex; gap: 12px; flex-wrap: wrap; }

@media (max-width: 640px) {
    .hero { padding: 36px 0 28px; }
    .hero__title { font-size: 30px; }
    .hero__subtitle { font-size: 15px; }
}

/* ---------- Page header ---------- */
.page-header { margin-bottom: 28px; padding-bottom: 16px; border-bottom: 1px solid var(--color-border); }
.page-header__title { font-size: 28px; }
.page-header__subtitle { color: var(--color-text-soft); margin-top: 6px; }
.page-back { display: inline-block; color: var(--color-text-mute); font-size: 14px; margin-bottom: 12px; }
.page-back:hover { color: var(--color-text); }

/* ---------- Buttons ---------- */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 6px;
    padding: 11px 22px; border-radius: var(--radius-md);
    border: 1px solid transparent;
    font-weight: 600; font-size: 15px;
    cursor: pointer; text-decoration: none;
    transition: background .15s, border-color .15s, color .15s, transform .05s;
}
.btn:active { transform: translateY(1px); }
.btn--primary { background: var(--color-primary); color: #fff; }
.btn--primary:hover { background: var(--color-primary-2); color: #fff; }
.btn--ghost { background: transparent; color: var(--color-primary); border-color: var(--color-primary); }
.btn--ghost:hover { background: var(--color-primary); color: #fff; }
.btn--accent { background: var(--color-accent); color: #fff; }
.btn--accent:hover { background: var(--color-accent-soft); color: #fff; }
.btn--lg { padding: 14px 32px; font-size: 16px; }

/* ---------- Cards / Grid ---------- */
.grid { display: grid; gap: 20px; }
.grid--cards { grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); }
.grid--cards-lg { grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); }
.grid--stats { grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); }
.grid--two { grid-template-columns: 1fr 1fr; }
.grid--three { grid-template-columns: repeat(3, 1fr); }
@media (max-width: 720px) {
    .grid--two, .grid--three { grid-template-columns: 1fr; }
}

.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 18px;
    transition: border-color .15s, box-shadow .15s, transform .15s;
}
a.card { color: inherit; display: block; }
a.card:hover { border-color: var(--color-border-strong); box-shadow: var(--shadow-md); transform: translateY(-2px); color: inherit; }

/* 카드 미디어 (썸네일) */
.card__media { background: var(--color-surface-soft); border-radius: var(--radius-sm); overflow: hidden; margin-bottom: 12px; position: relative; }
.card__media--square { aspect-ratio: 1 / 1; }
.card__media--portrait { aspect-ratio: 3 / 4; }
.card__media--landscape { aspect-ratio: 16 / 9; }
.card__media-img { width: 100%; height: 100%; object-fit: cover; display: block; }
.card__media-fallback {
    width: 100%; height: 100%; display: flex; align-items: center; justify-content: center;
    color: var(--color-text-mute); font-size: 13px; letter-spacing: .04em;
}
.card__eyebrow { font-size: 12px; color: var(--color-text-mute); margin-bottom: 4px; display: flex; align-items: center; gap: 6px; }
.card__title { font-weight: 700; font-size: 15px; line-height: 1.45; }
.card__sub { font-size: 13px; color: var(--color-text-soft); margin-top: 4px; }

/* ---------- Stat card (홈 통계) ---------- */
.stat-card {
    display: block; padding: 20px;
    background: var(--color-surface); border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: inherit; text-decoration: none;
    transition: border-color .15s, box-shadow .15s;
}
.stat-card:hover { border-color: var(--color-accent); color: inherit; box-shadow: var(--shadow-sm); }
.stat-card__label { color: var(--color-text-mute); font-size: 13px; }
.stat-card__value { font-size: 32px; font-weight: 800; font-family: var(--font-serif); margin-top: 6px; color: var(--color-primary); }

/* ---------- Conference highlight (홈) ---------- */
.feature-panel {
    background: linear-gradient(180deg, var(--color-surface) 0%, var(--color-surface-soft) 100%);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 28px;
    margin-bottom: 32px;
}
.feature-panel__eyebrow { color: var(--color-accent); font-weight: 700; letter-spacing: .12em; font-size: 12px; text-transform: uppercase; margin-bottom: 8px; }
.feature-panel__title { font-size: 26px; margin-bottom: 8px; }
.feature-panel__theme { color: var(--color-text-soft); font-size: 16px; }
.feature-panel__meta { color: var(--color-text-mute); font-size: 14px; margin-top: 12px; }
.feature-panel__cta { margin-top: 18px; }

/* ---------- Filter bar ---------- */
.filter-bar {
    display: flex; gap: 8px; flex-wrap: wrap;
    margin: 16px 0 28px;
    padding: 14px;
    background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-md);
}
.filter-bar select, .filter-bar input[type="text"], .filter-bar input[type="search"] {
    padding: 9px 12px;
    border: 1px solid var(--color-border-strong); border-radius: var(--radius-sm);
    background: var(--color-surface);
    color: var(--color-text);
}
.filter-bar input[type="text"], .filter-bar input[type="search"] { flex: 1; min-width: 200px; }
.filter-bar button { padding: 9px 18px; border: 1px solid var(--color-primary); background: var(--color-primary); color: #fff; border-radius: var(--radius-sm); cursor: pointer; }
.filter-bar button:hover { background: var(--color-primary-2); }

.results-meta { color: var(--color-text-mute); font-size: 14px; margin-bottom: 12px; }

/* ---------- Empty / Restricted ---------- */
.empty {
    text-align: center; padding: 64px 20px;
    color: var(--color-text-mute);
}
.empty__icon { font-size: 36px; margin-bottom: 8px; }

.notice-panel {
    text-align: center; padding: 64px 20px;
    background: var(--color-surface-soft);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    margin-top: 24px;
}
.notice-panel__icon { font-size: 44px; margin-bottom: 12px; }
.notice-panel__title { font-size: 22px; margin-bottom: 6px; }
.notice-panel__sub { color: var(--color-text-soft); }
.notice-panel__hint { color: var(--color-text-mute); font-size: 14px; margin-top: 4px; }

/* ---------- Pagination ---------- */
.pagination {
    margin-top: 32px;
    display: flex; gap: 4px; justify-content: center; flex-wrap: wrap;
}
.pagination a {
    padding: 7px 13px; border: 1px solid var(--color-border); border-radius: var(--radius-sm);
    color: var(--color-text); font-size: 14px;
}
.pagination a:hover { border-color: var(--color-border-strong); }
.pagination a.is-active { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }

/* ---------- Detail (master / library) ---------- */
.detail-grid { display: grid; grid-template-columns: 280px 1fr; gap: 36px; align-items: start; margin-top: 16px; }
.detail-grid--sm { grid-template-columns: 240px 1fr; }
@media (max-width: 720px) { .detail-grid, .detail-grid--sm { grid-template-columns: 1fr; gap: 20px; } }

.detail-photo { background: var(--color-surface-soft); border-radius: var(--radius-md); overflow: hidden; }
.detail-photo--portrait { aspect-ratio: 3 / 4; }
.detail-photo--square { aspect-ratio: 1 / 1; }
.detail-photo img { width: 100%; height: 100%; object-fit: cover; display: block; }

.detail-eyebrow { color: var(--color-text-mute); font-size: 13px; }
.detail-title { font-size: 32px; margin: 4px 0 4px; }
.detail-subtitle { font-size: 17px; color: var(--color-text-soft); font-weight: 400; margin-bottom: 8px; }

.meta-list {
    margin-top: 24px;
    display: grid; grid-template-columns: 130px 1fr; gap: 10px 18px;
    font-size: 14px;
    border-top: 1px solid var(--color-border);
    padding-top: 16px;
}
.meta-list dt { color: var(--color-text-mute); }
.meta-list dd { margin: 0; color: var(--color-text); }

.detail-section { margin-top: 28px; }
.detail-section__title { font-size: 18px; margin-bottom: 10px; padding-bottom: 6px; border-bottom: 2px solid var(--color-primary); display: inline-block; }

.detail-actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 24px; }

.rich-content { color: var(--color-text); line-height: 1.8; }
.rich-content img { max-width: 100%; height: auto; border-radius: var(--radius-sm); margin: 12px 0; }
.rich-content p { margin: 0 0 12px; }
.rich-content h2 { font-size: 20px; margin: 24px 0 8px; }
.rich-content h3 { font-size: 17px; margin: 18px 0 6px; }
.rich-content ul, .rich-content ol { padding-left: 22px; margin: 8px 0 12px; }
.rich-content blockquote { border-left: 3px solid var(--color-accent); margin: 12px 0; padding: 4px 14px; color: var(--color-text-soft); }

/* ---------- Tag / Badge ---------- */
.tag {
    display: inline-block; padding: 2px 8px; font-size: 12px;
    background: var(--color-surface-soft);
    color: var(--color-text-soft);
    border-radius: 999px;
}
.tag--accent { background: var(--color-accent); color: #fff; }
.tag--lock { background: transparent; color: var(--color-text-mute); padding: 0; }

/* ---------- Conference ---------- */
.conf-archive { display: grid; gap: 14px; margin-top: 16px; }
.conf-archive__item {
    display: flex; gap: 24px; align-items: center;
    border: 1px solid var(--color-border); border-radius: var(--radius-md);
    padding: 18px 22px;
    background: var(--color-surface);
    color: inherit;
}
.conf-archive__item:hover { border-color: var(--color-border-strong); box-shadow: var(--shadow-sm); color: inherit; }
.conf-archive__year { font-family: var(--font-serif); font-size: 36px; font-weight: 800; color: var(--color-primary); min-width: 96px; }
.conf-archive__edition { font-size: 13px; color: var(--color-text-mute); }
.conf-archive__title { font-weight: 700; font-size: 18px; margin-top: 2px; }
.conf-archive__venue { color: var(--color-text-soft); font-size: 14px; margin-top: 2px; }

.speaker-card { border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: 18px; text-align: center; background: var(--color-surface); }
.speaker-card__photo { width: 96px; height: 96px; border-radius: 50%; background: var(--color-surface-soft); margin: 0 auto 10px; overflow: hidden; }
.speaker-card__photo img { width: 100%; height: 100%; object-fit: cover; }
.speaker-card__name { font-weight: 700; }
.speaker-card__title { color: var(--color-text-soft); font-size: 13px; margin-top: 2px; }

.session-list { list-style: none; padding: 0; margin: 0; }
.session-list__item { padding: 18px 0; border-bottom: 1px solid var(--color-border); }
.session-list__time { color: var(--color-text-mute); font-size: 13px; }
.session-list__title { font-weight: 700; font-size: 17px; margin-top: 4px; }
.session-list__sub { color: var(--color-text-soft); font-size: 14px; }
.session-list__speakers { color: var(--color-text-mute); font-size: 13px; margin-top: 4px; }

/* ---------- Search results ---------- */
.search-section { margin-top: 32px; }
.search-section__title {
    font-size: 17px; padding-bottom: 6px; margin-bottom: 14px;
    border-bottom: 2px solid var(--color-primary);
}

/* ---------- Forms ---------- */
.form { max-width: 720px; margin-top: 20px; }
.form__row { display: grid; grid-template-columns: 140px 1fr; gap: 14px; align-items: center; margin-bottom: 12px; }
.form__row--top { align-items: flex-start; }
.form__row label { color: var(--color-text-soft); font-size: 14px; font-weight: 500; }
.form__row input[type="text"],
.form__row input[type="email"],
.form__row input[type="tel"],
.form__row input[type="search"],
.form__row input:not([type]),
.form__row select,
.form__row textarea {
    width: 100%;
    padding: 9px 12px;
    border: 1px solid var(--color-border-strong);
    border-radius: var(--radius-sm);
    background: var(--color-surface);
    color: var(--color-text);
}
.form__row textarea { min-height: 84px; resize: vertical; }
.form__row input:focus, .form__row select:focus, .form__row textarea:focus {
    outline: none; border-color: var(--color-primary); box-shadow: 0 0 0 3px rgba(26, 34, 54, .08);
}

.form__fieldset {
    margin-top: 22px; padding: 14px 18px;
    border: 1px solid var(--color-border); border-radius: var(--radius-md);
    background: var(--color-surface);
}
.form__fieldset legend { font-weight: 700; padding: 0 6px; color: var(--color-primary); }
.form__check { display: block; margin: 6px 0; font-size: 14px; }

.form__actions { margin-top: 28px; display: flex; gap: 10px; }

.form__alert {
    background: #fff4f1; border: 1px solid #f4cdc4; color: var(--color-danger);
    padding: 12px 14px; border-radius: var(--radius-sm); margin: 16px 0;
}
.form__alert ul { margin: 0; padding-left: 18px; }

@media (max-width: 640px) {
    .form__row { grid-template-columns: 1fr; gap: 6px; align-items: stretch; }
    .form__row label { margin-bottom: 2px; }
}

/* ---------- Search big input (검색 페이지) ---------- */
.search-form-large {
    display: flex; gap: 10px; flex-wrap: wrap; margin: 16px 0 24px;
}
.search-form-large input {
    flex: 1; min-width: 240px;
    padding: 14px 16px; font-size: 16px;
    border: 1px solid var(--color-border-strong); border-radius: var(--radius-sm);
    background: var(--color-surface);
}
.search-form-large input:focus { outline: none; border-color: var(--color-primary); }
.search-form-large button {
    padding: 12px 28px; font-size: 16px; cursor: pointer;
    background: var(--color-primary); color: #fff; border: none; border-radius: var(--radius-sm);
}

/* ---------- Page (정적 페이지) ---------- */
.static-article { max-width: 880px; }
.static-article h1 { font-size: 32px; margin-bottom: 18px; padding-bottom: 12px; border-bottom: 1px solid var(--color-border); }

/* ---------- 등록 완료 ---------- */
.success-panel {
    text-align: center; padding: 60px 24px;
    background: var(--color-surface-soft);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    margin-top: 24px;
}
.success-panel__check {
    width: 72px; height: 72px; border-radius: 50%;
    background: var(--color-success); color: #fff;
    display: inline-flex; align-items: center; justify-content: center;
    font-size: 36px; font-weight: 700;
    margin-bottom: 12px;
}
.success-panel__title { font-size: 24px; margin-bottom: 6px; }
.success-panel__sub { color: var(--color-text-soft); }

.ticket {
    display: inline-block;
    background: var(--color-surface);
    padding: 22px 32px;
    margin-top: 24px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    text-align: left;
    min-width: 280px;
}
.ticket__label { color: var(--color-text-mute); font-size: 13px; }
.ticket__name { font-weight: 700; font-size: 19px; }
.ticket__email { color: var(--color-text-soft); font-size: 13px; margin-top: 4px; }
.ticket__qr { margin-top: 16px; font-family: monospace; font-size: 11px; color: var(--color-text-mute); word-break: break-all; }