/* ===========================================================
   base.css — 포털(index) 및 전 페이지 공통 디자인 시스템
   모든 색상은 themes/*.css 의 시맨틱 변수로 구동된다.
   =========================================================== */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, system-ui, Roboto, sans-serif;
}

:root {
    /* 변수 미정의 테마 대비 폴백 */
    --bg-2: var(--bg-color);
    --surface-2: rgba(127, 127, 127, 0.08);
    --surface-3: rgba(127, 127, 127, 0.16);
    --border: rgba(127, 127, 127, 0.18);
    --accent-2: var(--accent);
    --on-accent: #ffffff;
    --danger: #ff5a6a;
}

html { font-size: clamp(15px, 1vw + 12px, 17px); }

body {
    background: linear-gradient(135deg, var(--bg-color) 0%, var(--bg-2) 100%);
    background-attachment: fixed;
    color: var(--text-main);
    transition: background 0.3s ease, color 0.3s ease;
    padding: clamp(12px, 3vw, 24px);
    min-height: 100vh;
}

/* ---------- 헤더 ---------- */
header {
    max-width: 1200px;
    margin: 0 auto clamp(32px, 6vw, 60px);
    text-align: center;
    padding: clamp(20px, 4vw, 40px) 0 20px;
}

header h1 {
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 800;
    margin-bottom: clamp(18px, 3vw, 30px);
    gap: 15px;
    letter-spacing: -0.5px;
    background: linear-gradient(90deg, var(--accent) 0%, var(--accent-2) 50%, var(--accent) 100%);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

header h1 .icon-logo { font-size: 1.1em; }

.controls {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
}

/* ---------- 검색바 (모던 클린 스타일) ---------- */
#calc-search {
    width: 100%;
    max-width: 600px;
    padding: 16px 20px 16px 50px;
    border-radius: 40px;
    border: 1px solid var(--border);
    background-color: var(--card-bg);
    color: var(--text-main);
    font-size: 1.05rem;
    font-weight: 500;
    outline: none;
    transition: box-shadow 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
    box-shadow: var(--shadow);
    background-image: url('data:image/svg+xml;charset=UTF-8,<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><circle cx="11" cy="11" r="8"></circle><line x1="21" y1="21" x2="16.65" y2="16.65"></line></svg>');
    background-repeat: no-repeat;
    background-position: 18px center;
    background-size: 20px 20px;
}

#calc-search:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 25%, transparent), var(--shadow);
}

/* ---------- 테마 선택기 ---------- */
#theme-select {
    padding: 10px 42px 10px 18px;
    border-radius: 10px;
    background-color: var(--card-bg);
    color: var(--text-main);
    border: 1px solid var(--border);
    cursor: pointer;
    font-weight: 600;
    min-width: 150px;
    max-width: 220px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    appearance: none;
    background-image: url('data:image/svg+xml;charset=UTF-8,<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><polyline points="6 9 12 15 18 9"></polyline></svg>');
    background-repeat: no-repeat;
    background-position: calc(100% - 12px) center;
    background-size: 16px 16px;
}

/* ---------- 컨테이너 ---------- */
#calculator-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 clamp(8px, 2vw, 20px);
}

/* ---------- 카테고리 ---------- */
.category-section {
    margin-top: clamp(36px, 6vw, 60px);
    margin-bottom: clamp(32px, 5vw, 50px);
}

.category-section:first-child { margin-top: 0; }

.category-title {
    font-size: clamp(1.4rem, 3vw, 1.8rem);
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 25px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--accent);
    display: flex;
    align-items: center;
    gap: 10px;
}

/* ---------- 계산기 그리드 ---------- */
.calc-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
    gap: clamp(12px, 2vw, 20px);
}

.calc-card {
    background-color: var(--card-bg);
    border-radius: 18px;
    padding: clamp(24px, 3vw, 35px) 20px;
    text-align: center;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
    border: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    align-items: center;
    box-shadow: var(--shadow);
}

.calc-card:hover,
.calc-card:focus-visible {
    transform: translateY(-6px);
    border-color: var(--accent);
    outline: none;
}

.calc-card .icon {
    font-size: clamp(2.4rem, 5vw, 3.2rem);
    margin-bottom: 18px;
    line-height: 1;
}

.calc-card h3 {
    font-size: clamp(1.05rem, 2vw, 1.3rem);
    margin-bottom: 10px;
    color: var(--text-main);
    font-weight: 700;
}

.calc-card .category {
    font-size: 0.9rem;
    color: var(--text-sub);
    background: var(--surface-2);
    padding: 6px 16px;
    border-radius: 20px;
    font-weight: 600;
}

.no-result {
    grid-column: 1 / -1;
    text-align: center;
    padding: 60px;
    color: var(--text-sub);
}

/* ---------- 포털 툴바 (카테고리 필터 + 정렬) ---------- */
.portal-toolbar {
    max-width: 1200px;
    margin: 0 auto clamp(18px, 3vw, 28px);
    padding: 0 clamp(8px, 2vw, 20px);
}
.chip-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 14px;
}
.cat-chip {
    width: auto;
    padding: 8px 16px;
    border-radius: 22px;
    border: 1px solid var(--border);
    background: var(--card-bg);
    color: var(--text-main);
    cursor: pointer;
    font-weight: 600;
    font-size: 0.9rem;
    white-space: nowrap;
    box-shadow: none;
    transition: border-color 0.15s ease, background 0.15s ease, color 0.15s ease, transform 0.1s ease;
}
.cat-chip:hover { border-color: var(--accent); transform: translateY(-1px); }
.cat-chip.active { background: var(--accent); color: var(--on-accent); border-color: var(--accent); }
.cat-chip .cnt { opacity: 0.7; font-size: 0.82em; margin-left: 5px; font-weight: 700; }
.toolbar-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}
.result-count { color: var(--text-sub); font-size: 0.92rem; font-weight: 600; }
.sort-select {
    padding: 9px 38px 9px 14px;
    border-radius: 10px;
    border: 1px solid var(--border);
    background-color: var(--card-bg);
    color: var(--text-main);
    font-weight: 600;
    cursor: pointer;
    appearance: none;
    background-image: url('data:image/svg+xml;charset=UTF-8,<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="gray" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><polyline points="6 9 12 15 18 9"></polyline></svg>');
    background-repeat: no-repeat;
    background-position: calc(100% - 12px) center;
    background-size: 16px 16px;
}

/* ---------- 반응형 ---------- */
@media (max-width: 768px) {
    .calc-grid { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); }
}

@media (max-width: 480px) {
    .calc-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
    #calc-search { font-size: 0.95rem; padding: 13px 16px 13px 44px; background-position: 15px center; }
    .calc-card { padding: 20px 12px; }
}