/* ═══════════════════════════════════════════════
   NeoGen Design System — Layout
   .container, .header, .nav-tabs, .tab-btn, .ad-container
   ═══════════════════════════════════════════════ */

/* ── Layout ──────────────────────────────────── */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px 48px;
}

/* ── Header ──────────────────────────────────── */
.header {
    background: var(--neo-navy);
    color: white;
    text-align: center;
    padding: 36px 24px 48px;
    position: relative;
    margin-bottom: -20px;
    overflow: hidden;
}

.header::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 60% 80% at 50% 120%, rgba(6,182,212,0.18) 0%, transparent 70%),
        radial-gradient(ellipse 40% 60% at 20% -10%, rgba(37,99,235,0.2) 0%, transparent 60%);
    pointer-events: none;
}

.header-controls {
    position: absolute;
    top: 20px;
    right: 24px;
    z-index: 10;
}

.language-switcher {
    display: flex;
    align-items: center;
    gap: 6px;
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.15);
    padding: 7px 14px;
    border-radius: 99px;
    backdrop-filter: blur(12px);
    transition: background 0.2s;
}

.language-switcher:hover { background: rgba(255,255,255,0.14); }

.lang-current {
    font-size: 13px;
    font-weight: 600;
    color: rgba(255,255,255,0.95);
}

.lang-separator {
    color: rgba(255,255,255,0.3);
    font-size: 13px;
}

.lang-link {
    font-size: 13px;
    font-weight: 500;
    color: rgba(255,255,255,0.6);
    text-decoration: none;
    transition: color 0.2s;
}
.lang-link:hover { color: var(--neo-cyan); }

.header h1 {
    font-size: 2.2rem;
    font-weight: 700;
    letter-spacing: -0.5px;
    color: #fff;
    position: relative;
}

.header h1 img {
    width: 44px;
    height: 44px;
    vertical-align: middle;
    margin-right: 10px;
    filter: drop-shadow(0 0 16px rgba(6,182,212,0.6));
}

.header > p {
    font-size: 0.95rem;
    color: rgba(255,255,255,0.6);
    margin-top: 6px;
    position: relative;
}

.intro-section {
    display: none; /* 헤더 아래 소개 텍스트 - 탭 위에 위치해서 숨김 */
}

/* ── Ad container (top) ──────────────────────── */
.ad-container {
    margin: 24px 0 0;
}
.ad-container > div {
    background: var(--bg-subtle);
    border: 1.5px dashed var(--border);
    padding: 16px;
    border-radius: var(--radius);
    color: var(--text-muted);
    font-size: 13px;
    text-align: center;
}

/* ── Navigation Tabs ─────────────────────────── */
.nav-tabs {
    display: flex;
    gap: 2px;
    background: var(--neo-navy);
    padding: 0 24px;
    overflow-x: auto;
    scrollbar-width: none;
    position: relative;
    z-index: 2;
}
.nav-tabs::-webkit-scrollbar { display: none; }

.tab-btn {
    flex-shrink: 0;
    padding: 14px 18px;
    border: none;
    background: transparent;
    color: rgba(255,255,255,0.5);
    cursor: pointer;
    font-size: 13px;
    font-weight: 500;
    font-family: inherit;
    border-bottom: 2px solid transparent;
    transition: color 0.2s, border-color 0.2s;
    white-space: nowrap;
}

.tab-btn:hover {
    color: rgba(255,255,255,0.85);
}

.tab-btn.active {
    color: var(--neo-cyan);
    border-bottom-color: var(--neo-cyan);
    background: transparent;
}

/* 파일가져오기 특별 스타일 */
.tab-btn[onclick*="file-import"] {
    color: var(--neo-cyan) !important;
    background: rgba(6,182,212,0.08) !important;
    border-radius: 6px 6px 0 0;
    font-weight: 600;
}

/* ── Global selectors ────────────────────────── */
.global-selectors {
    display: flex;
    gap: 10px;
    align-items: center;
}

.selector-group {
    display: flex;
    align-items: center;
    gap: 6px;
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.15);
    padding: 6px 12px;
    border-radius: 99px;
}

.selector-group label { font-size: 14px; margin: 0; }

.selector-group select {
    border: none;
    background: transparent;
    color: white;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    outline: none;
    padding: 2px 4px;
}

.currency-selector {
    display: flex;
    align-items: center;
    gap: 6px;
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.15);
    padding: 6px 12px;
    border-radius: 99px;
}

.currency-selector label { font-size: 14px; margin: 0; }

.currency-selector select {
    border: none;
    background: transparent;
    color: white;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    outline: none;
}

/* ── Sync indicator ──────────────────────────── */
.sync-indicator {
    position: fixed;
    top: 20px;
    right: 20px;
    background: var(--neo-navy);
    color: var(--neo-cyan);
    border: 1px solid rgba(6,182,212,0.3);
    padding: 8px 14px;
    border-radius: 99px;
    font-size: 12px;
    font-weight: 600;
    z-index: 9999;
    opacity: 0;
    transform: translateY(-12px);
    transition: all 0.3s ease;
}

.sync-indicator.show {
    opacity: 1;
    transform: translateY(0);
}

.sync-indicator .sync-icon {
    display: inline-block;
    animation: spin 1s linear infinite;
    margin-right: 4px;
}

/* ── Responsive — layout ─────────────────────── */
@media (max-width: 768px) {
    .container { padding: 0 16px 40px; }

    .header { padding: 28px 16px 40px; }
    .header h1 { font-size: 1.6rem; }

    .nav-tabs { padding: 0 12px; }
    .tab-btn  { padding: 12px 12px; font-size: 12px; }

    .header-controls { top: 14px; right: 16px; }
}