/* ========================================================================== 
   SANTA LỊCH - STYLESHEET
   Mục lục:
   01. Design tokens
   02. Reset & nền tảng
   03. Layout chung
   04. Navigation
   05. Buttons & form controls
   06. Daily toolbar & hero
   07. Overview / warnings
   08. Content panels & data tables
   09. Advice / astrology cards
   10. Hours grid
   11. Monthly calendar
   12. Converter
   13. Finder / chọn ngày theo mục đích, tuổi & Bát Trạch
   14. Guide / sources / disclaimer
   15. Footer
   16. Responsive
   ========================================================================== */

/* ========================================================================== 
   01. DESIGN TOKENS
   ========================================================================== */
:root {
    --brand-blue: #0054a6;
    --brand-blue-dark: #003f7f;
    --brand-blue-soft: #eaf3fc;
    --brand-yellow: #ffb800;
    --brand-yellow-soft: #fff6d8;

    --bg-page: #f4f7fb;
    --bg-card: #ffffff;
    --bg-soft: #f8fafc;
    --bg-muted: #eef3f8;

    --text-main: #243447;
    --text-soft: #5f6f82;
    --text-faint: #8290a1;

    --border: #dfe7ef;
    --border-strong: #cbd7e3;

    --good: #18794e;
    --good-bg: #edf9f2;
    --good-border: #b9e4cb;
    --bad: #b42318;
    --bad-bg: #fff1f0;
    --bad-border: #f1c1bd;

    --week-sat: #d97706;
    --week-sun: #c62828;

    --shadow-sm: 0 3px 10px rgba(25, 55, 85, 0.06);
    --shadow-md: 0 12px 30px rgba(25, 55, 85, 0.09);

    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;

    --content-width: 1120px;
    --reading-width: 900px;
}

/* ========================================================================== 
   02. RESET & NỀN TẢNG
   ========================================================================== */
* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    min-height: 100vh;
    background: var(--bg-page);
    color: var(--text-main);
    font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.55;
}

a {
    color: inherit;
}

button,
input,
select {
    font: inherit;
}

button,
a {
    -webkit-tap-highlight-color: transparent;
}

h1,
h2,
h3,
p {
    margin-top: 0;
}

/* ========================================================================== 
   03. LAYOUT CHUNG
   ========================================================================== */
.site-main {
    width: min(calc(100% - 32px), var(--content-width));
    margin: 0 auto;
    padding: 30px 0 56px;
}

.content-section,
.warning-panel,
.method-disclaimer,
.principles-panel {
    margin-top: 24px;
}

.page-intro {
    max-width: 780px;
    margin: 8px auto 30px;
    text-align: center;
}

.page-intro h1 {
    margin-bottom: 12px;
    color: var(--brand-blue-dark);
    font-size: clamp(30px, 4vw, 44px);
    line-height: 1.15;
}

.page-intro p {
    margin-bottom: 0;
    color: var(--text-soft);
    font-size: 17px;
}

.compact-intro {
    margin-bottom: 20px;
}

.section-heading {
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 24px;
    margin-bottom: 14px;
}

.section-heading h2 {
    margin: 3px 0 0;
    color: var(--brand-blue-dark);
    font-size: 24px;
    line-height: 1.2;
}

.section-heading p {
    max-width: 580px;
    margin-bottom: 0;
    color: var(--text-soft);
    font-size: 14px;
}

.compact-heading {
    align-items: center;
}

.section-kicker {
    display: inline-block;
    color: var(--brand-blue);
    font-size: 12px;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.two-column-layout,
.three-column-layout,
.converter-grid,
.guide-grid {
    display: grid;
    gap: 16px;
}

.two-column-layout {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.three-column-layout {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.panel {
    min-width: 0;
    padding: 20px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.panel h3,
.panel h2 {
    color: var(--brand-blue-dark);
}

.panel h3 {
    margin-bottom: 14px;
    font-size: 18px;
}

/* ========================================================================== 
   04. NAVIGATION
   ========================================================================== */
.top-nav {
    position: sticky;
    top: 0;
    z-index: 100;
    width: 100%;
    background: var(--brand-blue);
    border-bottom: 3px solid var(--brand-yellow);
    box-shadow: 0 4px 16px rgba(0, 63, 127, 0.14);
}

.nav-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    width: min(calc(100% - 32px), var(--content-width));
    margin: 0 auto;
    min-height: 66px;
}

.logo {
    color: #fff;
    font-size: 24px;
    font-weight: 800;
    letter-spacing: 0.02em;
    text-decoration: none;
    white-space: nowrap;
}

.logo span {
    color: var(--brand-yellow);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 6px;
}

.nav-links a {
    padding: 8px 13px;
    color: #fff;
    border-radius: 999px;
    font-size: 14px;
    font-weight: 700;
    text-decoration: none;
    transition: background 0.18s ease, color 0.18s ease;
}

.nav-links a:hover {
    background: rgba(255, 255, 255, 0.13);
}

.nav-links a.active {
    background: var(--brand-yellow);
    color: var(--brand-blue-dark);
}

/* ========================================================================== 
   05. BUTTONS & FORM CONTROLS
   ========================================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 40px;
    padding: 8px 14px;
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    font-weight: 750;
    text-decoration: none;
    cursor: pointer;
    transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}

.btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.btn-primary {
    background: var(--brand-blue);
    color: #fff;
}

.btn-primary:hover {
    background: var(--brand-blue-dark);
}

.btn-secondary {
    background: #fff;
    color: var(--brand-blue);
    border-color: var(--border-strong);
}

input[type="date"],
input[type="number"],
select {
    min-height: 40px;
    padding: 7px 10px;
    background: #fff;
    color: var(--text-main);
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-sm);
    outline: none;
}

input:focus,
select:focus {
    border-color: var(--brand-blue);
    box-shadow: 0 0 0 3px rgba(0, 84, 166, 0.10);
}

label {
    color: var(--text-soft);
    font-size: 14px;
    font-weight: 650;
}

/* ========================================================================== 
   06. DAILY TOOLBAR & HERO
   ========================================================================== */
.date-toolbar {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.toolbar-link {
    color: var(--brand-blue);
    font-size: 14px;
    font-weight: 700;
    text-decoration: none;
}

.toolbar-link:last-child {
    text-align: right;
}

.date-jump-form {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 7px 10px;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.date-jump-form label {
    white-space: nowrap;
}

.daily-hero {
    display: grid;
    grid-template-columns: minmax(260px, 0.8fr) minmax(360px, 1.2fr);
    overflow: hidden;
    background: #fff;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.daily-hero-solar {
    display: flex;
    flex-direction: column;
    justify-content: center;
    min-height: 330px;
    padding: 32px;
    color: #fff;
    background: linear-gradient(150deg, var(--brand-blue-dark), var(--brand-blue));
}

.hero-eyebrow {
    color: rgba(255, 255, 255, 0.82);
    font-size: 15px;
    font-weight: 700;
}

.hero-day {
    margin: 6px 0;
    color: var(--brand-yellow);
    font-size: clamp(88px, 12vw, 132px);
    font-weight: 850;
    line-height: 0.95;
    letter-spacing: -0.06em;
}

.hero-month-year {
    font-size: 25px;
    font-weight: 750;
}

.hero-term {
    align-self: flex-start;
    margin-top: 20px;
    padding: 7px 12px;
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.22);
    border-radius: 999px;
    font-size: 14px;
}

.daily-hero-lunar {
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 34px 38px;
    background: linear-gradient(180deg, #ffffff, #fbfdff);
}

.lunar-label {
    margin-bottom: 12px;
    color: var(--brand-blue);
    font-size: 13px;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.lunar-date-row {
    display: flex;
    align-items: center;
    gap: 18px;
}

.lunar-big-day {
    min-width: 78px;
    color: var(--brand-blue-dark);
    font-size: 64px;
    font-weight: 850;
    line-height: 1;
}

.lunar-date-row strong,
.lunar-date-row span {
    display: block;
}

.lunar-date-row strong {
    margin-bottom: 4px;
    font-size: 24px;
}

.lunar-date-row div > span {
    color: var(--text-soft);
    font-size: 16px;
}

.occasion-badge {
    display: flex;
    align-items: center;
    gap: 11px;
    margin-top: 24px;
    padding: 12px 14px;
    background: var(--brand-yellow-soft);
    border: 1px solid #f1d77a;
    border-radius: var(--radius-md);
}

.occasion-badge > span {
    color: #b47b00;
}

.occasion-badge strong,
.occasion-badge small {
    display: block;
}

.occasion-badge strong {
    color: #7f5900;
}

.occasion-badge small {
    color: #9b7b2a;
}

/* ========================================================================== 
   07. OVERVIEW / WARNINGS
   ========================================================================== */
.overview-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 12px;
    margin-top: 16px;
}

.overview-card {
    position: relative;
    min-width: 0;
    padding: 16px;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.overview-card::before {
    position: absolute;
    top: 0;
    left: 16px;
    width: 40px;
    height: 3px;
    background: var(--brand-blue);
    border-radius: 0 0 4px 4px;
    content: "";
}

.overview-card.is-good::before {
    background: var(--good);
}

.overview-card.is-bad::before {
    background: var(--bad);
}

.overview-label,
.overview-card strong,
.overview-card small {
    display: block;
}

.overview-label {
    margin-bottom: 8px;
    color: var(--text-faint);
    font-size: 12px;
    font-weight: 800;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.overview-card strong {
    overflow: hidden;
    margin-bottom: 2px;
    color: var(--text-main);
    font-size: 17px;
    text-overflow: ellipsis;
}

.overview-card small {
    color: var(--text-soft);
}

.warning-panel {
    padding: 18px 20px;
    background: #fff9f8;
    border: 1px solid var(--bad-border);
    border-radius: var(--radius-md);
}

.warning-list {
    display: grid;
    gap: 8px;
}

.warning-item {
    display: grid;
    grid-template-columns: 140px 1fr;
    gap: 12px;
    padding: 10px 12px;
    background: #fff;
    border-radius: var(--radius-sm);
}

.warning-item strong {
    color: var(--bad);
}

.warning-item span {
    color: var(--text-soft);
    font-size: 14px;
}

/* ========================================================================== 
   08. CONTENT PANELS & DATA TABLES
   ========================================================================== */
.table-wrap {
    overflow-x: auto;
}

.detail-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

.detail-table th,
.detail-table td {
    padding: 11px 10px;
    border-bottom: 1px solid var(--border);
    text-align: left;
    vertical-align: top;
}

.detail-table thead th {
    background: var(--bg-soft);
    color: var(--text-soft);
    font-size: 12px;
    letter-spacing: 0.03em;
    text-transform: uppercase;
}

.detail-table tbody tr:last-child th,
.detail-table tbody tr:last-child td {
    border-bottom: 0;
}

.detail-table .emphasis {
    color: var(--brand-blue);
    font-weight: 800;
}

.fact-panel {
    background: linear-gradient(180deg, #fff, #fbfdff);
}

.fact-list {
    margin: 0;
}

.fact-list > div {
    display: grid;
    grid-template-columns: minmax(115px, 0.8fr) minmax(0, 1.2fr);
    gap: 14px;
    padding: 10px 0;
    border-bottom: 1px dashed var(--border);
}

.fact-list > div:last-child {
    border-bottom: 0;
}

.fact-list dt {
    color: var(--text-soft);
}

.fact-list dd {
    margin: 0;
    font-weight: 750;
    text-align: right;
}

.accent-red {
    color: var(--bad);
}

.accent-blue {
    color: var(--brand-blue);
}

/* ========================================================================== 
   09. ADVICE / ASTROLOGY CARDS
   ========================================================================== */
.astrology-panel {
    display: flex;
    flex-direction: column;
}

.panel-title-row {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 14px;
}

.panel-title-row h3 {
    margin: 0;
}

.good-pill,
.bad-pill,
.neutral-pill {
    display: inline-flex;
    flex: 0 0 auto;
    padding: 4px 8px;
    border-radius: 999px;
    font-size: 11px;
    font-weight: 800;
}

.good-pill {
    background: var(--good-bg);
    color: var(--good);
}

.bad-pill {
    background: var(--bad-bg);
    color: var(--bad);
}

.neutral-pill {
    background: var(--brand-blue-soft);
    color: var(--brand-blue);
}

.advice {
    margin-bottom: 10px;
    padding: 11px 12px;
    border-radius: var(--radius-sm);
}

.advice strong,
.advice p {
    margin: 0;
}

.advice strong {
    display: block;
    margin-bottom: 3px;
    font-size: 13px;
}

.advice p {
    font-size: 14px;
}

.good-advice {
    background: var(--good-bg);
    border-left: 3px solid var(--good);
}

.good-advice strong {
    color: var(--good);
}

.bad-advice {
    background: var(--bad-bg);
    border-left: 3px solid var(--bad);
}

.bad-advice strong {
    color: var(--bad);
}

.lead-copy {
    color: var(--text-main);
    font-size: 15px;
}

.method-note {
    margin: auto 0 0;
    padding-top: 10px;
    color: var(--text-faint);
    border-top: 1px dashed var(--border);
    font-size: 12px;
}

/* ========================================================================== 
   10. HOURS GRID
   ========================================================================== */
.hours-grid {
    display: grid;
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: 10px;
}

.hour-card {
    padding: 13px;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.hour-good {
    border-color: var(--good-border);
    background: linear-gradient(180deg, #fff, #f7fcf9);
}

.hour-bad {
    border-color: #ead7d5;
}

.hour-top {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 6px;
}

.hour-top strong {
    color: var(--brand-blue-dark);
    font-size: 18px;
}

.hour-top span {
    color: var(--text-faint);
    font-size: 11px;
}

.hour-canchi {
    margin-top: 5px;
    font-size: 13px;
    font-weight: 750;
}

.hour-star {
    min-height: 36px;
    margin: 3px 0 8px;
    color: var(--text-soft);
    font-size: 12px;
}

.hour-status {
    display: inline-block;
    padding: 3px 7px;
    border-radius: 999px;
    font-size: 10px;
    font-weight: 800;
}

.hour-good .hour-status {
    background: var(--good-bg);
    color: var(--good);
}

.hour-bad .hour-status {
    background: var(--bad-bg);
    color: var(--bad);
}

/* ========================================================================== 
   11. MONTHLY CALENDAR
   ========================================================================== */
.month-controls {
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 14px;
    margin-bottom: 14px;
}

.month-picker {
    display: flex;
    align-items: end;
    justify-content: center;
    gap: 10px;
}

.month-picker label {
    display: grid;
    gap: 3px;
}

.month-picker input {
    width: 100px;
}

.calendar-legend {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 14px;
    margin-bottom: 8px;
    color: var(--text-soft);
    font-size: 12px;
}

.calendar-legend span {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.legend-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.legend-lunar {
    display: inline-grid;
    place-items: center;
    width: 22px;
    height: 20px;
    color: #9a6e00;
    background: var(--brand-yellow-soft);
    border-radius: 5px;
    font-size: 11px;
    font-style: normal;
    font-weight: 800;
}

.calendar-container {
    overflow: hidden;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

table.calendar {
    width: 100%;
    border-collapse: collapse;
    table-layout: fixed;
}

table.calendar th {
    padding: 12px 4px;
    background: var(--brand-blue);
    color: #fff;
    border-right: 1px solid rgba(255, 255, 255, 0.14);
    font-size: 12px;
    letter-spacing: 0.03em;
    text-transform: uppercase;
}

table.calendar th.saturday {
    color: #ffd79c;
}

table.calendar th.sunday {
    color: #ffd1d1;
}

table.calendar td {
    height: 92px;
    padding: 0;
    border-right: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    vertical-align: top;
}

table.calendar td.empty {
    background: #f6f8fb;
}

table.calendar td.today {
    background: var(--brand-blue-soft);
    box-shadow: inset 0 0 0 2px var(--brand-blue);
}

.calendar-day-link {
    position: relative;
    display: block;
    width: 100%;
    height: 100%;
    padding: 9px;
    text-decoration: none;
    transition: background 0.15s ease;
}

.calendar-day-link:hover {
    background: #f8fbff;
}

.solar-day,
.lunar-day {
    display: block;
}

.solar-day {
    color: var(--text-main);
    font-size: 21px;
    font-weight: 800;
}

.lunar-day {
    margin-top: 3px;
    color: var(--text-soft);
    font-size: 13px;
}

td.saturday .solar-day,
td.saturday .lunar-day {
    color: var(--week-sat);
}

td.sunday .solar-day,
td.sunday .lunar-day {
    color: var(--week-sun);
}

.lunar-highlight {
    display: inline-block;
    width: auto;
    padding: 2px 5px;
    color: #8a6200 !important;
    background: var(--brand-yellow-soft);
    border-radius: 5px;
    font-weight: 800;
}

.day-dot {
    position: absolute;
    top: 10px;
    right: 10px;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.16);
}

.dot-hoang-dao {
    background: #d92d20;
}

.dot-hac-dao {
    background: #202b38;
}

/* ========================================================================== 
   12. CONVERTER
   ========================================================================== */
.converter-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    max-width: 900px;
    margin: 0 auto;
}

.converter-card {
    display: grid;
    gap: 12px;
}

.converter-card h2 {
    margin-bottom: 0;
    font-size: 21px;
}

.converter-card label:not(.checkbox-row) {
    display: grid;
    gap: 5px;
}

.form-row-three {
    display: grid;
    grid-template-columns: 0.7fr 0.7fr 1.2fr;
    gap: 8px;
}

.form-row-three label {
    display: grid;
    gap: 5px;
}

.checkbox-row {
    display: flex;
    align-items: center;
    gap: 7px;
}

.result-box {
    display: grid;
    justify-items: center;
    gap: 7px;
    max-width: 900px;
    margin: 18px auto 0;
    padding: 20px;
    text-align: center;
    border-radius: var(--radius-md);
}

.result-box > span,
.result-box > small {
    color: var(--text-soft);
}

.result-box > strong {
    color: var(--brand-blue-dark);
    font-size: 26px;
}

.result-success {
    background: var(--good-bg);
    border: 1px solid var(--good-border);
}

.result-error {
    background: var(--bad-bg);
    border: 1px solid var(--bad-border);
}

.result-error strong {
    color: var(--bad);
}

/* ========================================================================== 
   13. FINDER / CHỌN NGÀY THEO MỤC ĐÍCH, TUỔI & BÁT TRẠCH
   ========================================================================== */
.finder-form {
    max-width: 1120px;
    margin: 0 auto;
}

.finder-purpose-grid {
    display: grid;
    grid-template-columns: minmax(200px, 1.35fr) repeat(2, minmax(155px, 0.8fr)) auto;
    align-items: end;
    gap: 12px;
}

.finder-purpose-grid-with-age {
    grid-template-columns: minmax(170px, 1.15fr) minmax(125px, 0.68fr) minmax(125px, 0.68fr) repeat(2, minmax(140px, 0.78fr)) auto;
}

.finder-purpose-grid label {
    display: grid;
    gap: 5px;
    color: var(--text-soft);
    font-size: 13px;
    font-weight: 700;
}

.finder-purpose-note {
    margin: 12px 0 0;
    color: var(--text-soft);
    font-size: 13px;
}

.field-optional {
    color: var(--text-faint);
    font-size: 11px;
    font-weight: 600;
}

.age-profile-panel {
    display: grid;
    grid-template-columns: minmax(220px, 0.75fr) minmax(0, 1.25fr);
    gap: 16px;
    max-width: 900px;
    margin: 18px auto 0;
    padding: 17px 19px;
    background: var(--brand-blue-soft);
    border: 1px solid #c8def3;
    border-radius: var(--radius-md);
}

.age-profile-main,
.age-profile-rule {
    display: grid;
    align-content: center;
    gap: 4px;
}

.age-profile-main strong {
    color: var(--brand-blue-dark);
    font-size: 21px;
}

.age-profile-main small,
.age-profile-rule span,
.age-profile-rule small {
    color: var(--text-soft);
    line-height: 1.45;
}

.age-profile-rule {
    padding-left: 16px;
    border-left: 1px solid #c8def3;
}

.bat-trach-panel {
    display: grid;
    grid-template-columns: minmax(230px, 0.72fr) minmax(0, 1.28fr);
    gap: 18px;
    max-width: 900px;
    margin: 12px auto 0;
    padding: 18px 19px;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.bat-trach-summary {
    display: grid;
    align-content: start;
    gap: 5px;
}

.bat-trach-summary > strong {
    color: var(--brand-blue-dark);
    font-size: 19px;
    line-height: 1.35;
}

.bat-trach-summary > span:not(.section-kicker),
.bat-trach-summary > small,
.bat-trach-note {
    color: var(--text-soft);
}

.bat-trach-summary > small {
    padding-top: 5px;
    font-size: 12px;
    line-height: 1.45;
}

.bat-trach-direction-groups {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
}

.bat-trach-direction-group {
    display: grid;
    align-content: start;
    gap: 7px;
    padding: 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
}

.bat-trach-direction-group > strong {
    font-size: 13px;
}

.bat-trach-direction-group > span {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 10px;
    padding-top: 6px;
    border-top: 1px dashed var(--border);
    font-size: 12px;
}

.bat-trach-direction-group b {
    font-weight: 700;
}

.bat-trach-direction-group em {
    font-style: normal;
    font-weight: 800;
}

.bat-trach-good {
    background: var(--good-bg);
    border-color: var(--good-border);
}

.bat-trach-good > strong,
.bat-trach-good em {
    color: var(--good);
}

.bat-trach-bad {
    background: var(--bad-bg);
    border-color: var(--bad-border);
}

.bat-trach-bad > strong,
.bat-trach-bad em {
    color: var(--bad);
}

.bat-trach-note {
    grid-column: 1 / -1;
    margin: 0;
    padding-top: 12px;
    border-top: 1px solid var(--border);
    font-size: 12px;
    line-height: 1.5;
}

.finder-summary {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
    max-width: 900px;
    margin: 18px auto 0;
}

.finder-summary > div {
    display: grid;
    gap: 2px;
    padding: 15px 18px;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    text-align: center;
    box-shadow: var(--shadow-sm);
}

.finder-summary strong {
    color: var(--brand-blue-dark);
    font-size: 28px;
}

.finder-summary span {
    color: var(--text-soft);
    font-size: 13px;
}

.finder-results {
    display: grid;
    gap: 12px;
}

.finder-card {
    display: grid;
    grid-template-columns: 215px minmax(0, 1fr);
    overflow: hidden;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.finder-priority {
    border-color: var(--good-border);
}

.finder-card-date {
    display: grid;
    align-content: center;
    gap: 4px;
    padding: 18px;
    background: var(--bg-soft);
    border-right: 1px solid var(--border);
}

.finder-priority .finder-card-date {
    background: var(--good-bg);
}

.finder-card-date > span {
    color: var(--text-soft);
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
}

.finder-card-date > strong {
    color: var(--brand-blue-dark);
    font-size: 24px;
}

.finder-card-date > small {
    color: var(--text-soft);
    line-height: 1.45;
}

.finder-card-body {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 12px 18px;
    padding: 16px 18px;
}

.finder-badge-row {
    grid-column: 1 / -1;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 7px;
}

.finder-tier {
    width: fit-content;
    padding: 4px 9px;
    background: var(--brand-blue-soft);
    color: var(--brand-blue-dark);
    border-radius: 999px;
    font-size: 12px;
    font-weight: 800;
}

.age-badge {
    width: fit-content;
    padding: 4px 9px;
    background: var(--bg-muted);
    color: var(--text-soft);
    border-radius: 999px;
    font-size: 12px;
    font-weight: 800;
}

.age-badge-good {
    background: var(--good-bg);
    color: var(--good);
}

.age-badge-caution {
    background: var(--brand-yellow-soft);
    color: #8a5a00;
}

.age-badge-bad {
    background: var(--bad-bg);
    color: var(--bad);
}

.finder-priority .finder-tier {
    background: var(--good-bg);
    color: var(--good);
}

.finder-signals {
    grid-column: 1;
    display: grid;
    gap: 5px;
}

.finder-age-signals {
    grid-column: 1;
    display: grid;
    gap: 4px;
    padding: 10px 12px;
    background: var(--bg-soft);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
}

.finder-age-signals strong {
    margin-bottom: 2px;
    color: var(--brand-blue-dark);
    font-size: 12px;
}

.finder-age-signals span {
    font-size: 12px;
    line-height: 1.45;
}

.finder-card-body > .btn {
    grid-column: 2;
    grid-row: 2 / span 2;
    align-self: center;
}

.finder-signals span {
    font-size: 13px;
    line-height: 1.45;
}

.signal-good {
    color: var(--good);
}

.signal-caution {
    color: #8a5a00;
}

.signal-neutral {
    color: var(--text-soft);
}

.finder-limit-note {
    margin: 14px 0 0;
    color: var(--text-soft);
    font-size: 13px;
    text-align: center;
}

.finder-excluded-section {
    margin-top: 24px;
}

.finder-age-excluded {
    border-color: var(--bad-border);
}

.finder-age-excluded .finder-card-date {
    background: var(--bad-bg);
}

.finder-age-excluded .finder-card-date > strong {
    color: var(--bad);
}

.error-page {
    max-width: 720px;
    padding-top: 48px;
    padding-bottom: 64px;
}

.error-actions {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 20px;
}

/* ========================================================================== 
   14. GUIDE / SOURCES / DISCLAIMER
   ========================================================================== */
.guide-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.guide-card {
    position: relative;
    overflow: hidden;
}

.guide-number {
    position: absolute;
    top: 10px;
    right: 14px;
    color: rgba(0, 84, 166, 0.08);
    font-size: 50px;
    font-weight: 900;
    line-height: 1;
}

.guide-card h2 {
    position: relative;
    margin-bottom: 10px;
    font-size: 19px;
}

.guide-card p {
    position: relative;
    margin-bottom: 0;
    color: var(--text-soft);
    font-size: 14px;
}

.source-section {
    max-width: 900px;
    margin-right: auto;
    margin-left: auto;
}

.source-list {
    display: grid;
    gap: 8px;
}

.source-list a {
    display: grid;
    grid-template-columns: minmax(220px, 0.8fr) minmax(0, 1.2fr);
    gap: 14px;
    padding: 13px 15px;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    text-decoration: none;
}

.source-list a:hover {
    border-color: #a8c7e5;
    box-shadow: var(--shadow-sm);
}

.source-list strong {
    color: var(--brand-blue);
}

.source-list span {
    color: var(--text-soft);
    font-size: 14px;
}

.principles-panel,
.method-disclaimer {
    max-width: 900px;
    margin-right: auto;
    margin-left: auto;
    padding: 18px 20px;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
}

.principles-panel h2 {
    margin-bottom: 8px;
    color: var(--brand-blue-dark);
    font-size: 20px;
}

.principles-panel p {
    margin-bottom: 0;
    color: var(--text-soft);
}

.method-disclaimer summary {
    color: var(--brand-blue);
    font-weight: 800;
    cursor: pointer;
}

.details-content {
    padding-top: 12px;
}

.details-content p {
    margin-bottom: 10px;
    color: var(--text-soft);
    font-size: 14px;
}

.details-content p:last-child {
    margin-bottom: 0;
}

/* ========================================================================== 
   15. FOOTER
   ========================================================================== */
.site-footer {
    width: 100%;
    padding: 22px 0;
    background: #fff;
    color: var(--text-soft);
    border-top: 1px solid var(--border);
    font-size: 13px;
}

.footer-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    width: min(calc(100% - 32px), var(--content-width));
    margin: 0 auto;
}

.footer-content a {
    color: var(--brand-blue);
    font-weight: 700;
    text-decoration: none;
}

.footer-note {
    text-align: right;
}

/* ========================================================================== 
   16. RESPONSIVE
   ========================================================================== */
@media (max-width: 980px) {
    .overview-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .three-column-layout,
    .guide-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .finder-purpose-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .hours-grid {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }
}

@media (max-width: 760px) {
    .site-main {
        width: min(calc(100% - 20px), var(--content-width));
        padding-top: 18px;
    }

    .nav-content {
        width: min(calc(100% - 20px), var(--content-width));
        min-height: 58px;
    }

    .logo {
        font-size: 20px;
    }

    .nav-links {
        overflow-x: auto;
        padding: 6px 0;
    }

    .nav-links a {
        padding: 7px 10px;
        font-size: 12px;
        white-space: nowrap;
    }

    .date-toolbar {
        grid-template-columns: 1fr 1fr;
    }

    .date-jump-form {
        grid-column: 1 / -1;
        grid-row: 1;
        justify-content: center;
    }

    .daily-hero {
        grid-template-columns: 1fr;
    }

    .daily-hero-solar {
        min-height: 250px;
        padding: 26px;
    }

    .hero-day {
        font-size: 94px;
    }

    .daily-hero-lunar {
        padding: 26px;
    }

    .section-heading {
        display: block;
    }

    .section-heading p {
        margin-top: 9px;
    }

    .two-column-layout,
    .three-column-layout,
    .converter-grid,
    .guide-grid,
    .finder-purpose-grid,
    .finder-summary,
    .age-profile-panel,
    .bat-trach-panel {
        grid-template-columns: 1fr;
    }

    .age-profile-rule {
        padding-top: 12px;
        padding-left: 0;
        border-top: 1px solid #c8def3;
        border-left: 0;
    }

    .bat-trach-direction-groups {
        grid-template-columns: 1fr;
    }

    .finder-card {
        grid-template-columns: 1fr;
    }

    .finder-card-date {
        border-right: 0;
        border-bottom: 1px solid var(--border);
    }

    .finder-card-body {
        grid-template-columns: 1fr;
    }

    .finder-signals,
    .finder-age-signals,
    .finder-card-body > .btn {
        grid-column: 1;
        grid-row: auto;
    }

    .finder-card-body .btn {
        width: 100%;
    }

    .hours-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .month-controls {
        grid-template-columns: 1fr 1fr;
    }

    .month-picker {
        grid-column: 1 / -1;
        grid-row: 1;
        flex-wrap: wrap;
    }

    table.calendar th {
        font-size: 10px;
    }

    table.calendar td {
        height: 78px;
    }

    .calendar-day-link {
        padding: 7px;
    }

    .solar-day {
        font-size: 18px;
    }

    .lunar-day {
        font-size: 11px;
    }

    .day-dot {
        top: 7px;
        right: 7px;
    }

    .source-list a {
        grid-template-columns: 1fr;
        gap: 4px;
    }

    .error-actions {
        flex-direction: column;
    }

    .error-actions .btn {
        width: 100%;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
    }

    .footer-note {
        text-align: center;
    }
}

@media (max-width: 520px) {
    .nav-content {
        align-items: flex-start;
        flex-direction: column;
        gap: 2px;
        padding: 10px 0 8px;
    }

    .nav-links {
        width: 100%;
    }

    .overview-grid {
        grid-template-columns: 1fr;
    }

    .hours-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .warning-item {
        grid-template-columns: 1fr;
        gap: 2px;
    }

    .lunar-date-row {
        align-items: flex-start;
    }

    .lunar-big-day {
        min-width: 62px;
        font-size: 52px;
    }

    .lunar-date-row strong {
        font-size: 20px;
    }

    .fact-list > div {
        grid-template-columns: 1fr;
        gap: 2px;
    }

    .fact-list dd {
        text-align: left;
    }

    .form-row-three {
        grid-template-columns: 1fr 1fr;
    }

    .form-row-three label:last-child {
        grid-column: 1 / -1;
    }

    .calendar-container {
        border-radius: var(--radius-md);
    }

    table.calendar th {
        padding: 9px 1px;
    }

    table.calendar td {
        height: 66px;
    }

    .solar-day {
        font-size: 16px;
    }

    .lunar-day {
        font-size: 10px;
    }

    .lunar-highlight {
        padding: 1px 3px;
    }
}