/* ==========================================================================
   Lịch Việt - Main Stylesheet
   Complete custom CSS for the Lịch Việt Laravel project
   ========================================================================== */

/* --- CSS Variables / Theme --- */
:root {
    --primary: #10B981;
    --primary-dark: #059669;
    --primary-light: #D1FAE5;
    --primary-lighter: #ECFDF5;
    --gold: #F59E0B;
    --gold-light: #FEF3C7;
    --gold-dark: #D97706;
    --red: #EF4444;
    --red-light: #FEE2E2;
    --red-dark: #DC2626;
    --bg: #F9FAFB;
    --bg-alt: #F3F4F6;
    --card: #FFFFFF;
    --text: #111827;
    --text-secondary: #6B7280;
    --text-muted: #9CA3AF;
    --border: #E5E7EB;
    --border-dark: #D1D5DB;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --radius-sm: 0.375rem;
    --radius: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --transition: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --max-width: 1280px;
}

/* --- Reset & Base --- */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

a {
    color: var(--primary-dark);
    text-decoration: none;
    transition: color var(--transition);
}

a:hover {
    color: var(--primary);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

ul, ol {
    list-style: none;
}

/* --- Utility Classes --- */
.container {
    width: 100%;
    max-width: var(--max-width);
    margin-left: auto;
    margin-right: auto;
    padding-left: 1rem;
    padding-right: 1rem;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

.text-center { text-align: center; }
.text-right { text-align: right; }
.text-left { text-align: left; }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: 0.25rem; }
.gap-2 { gap: 0.5rem; }
.gap-3 { gap: 0.75rem; }
.gap-4 { gap: 1rem; }
.gap-6 { gap: 1.5rem; }

.mt-2 { margin-top: 0.5rem; }
.mt-4 { margin-top: 1rem; }
.mt-6 { margin-top: 1.5rem; }
.mt-8 { margin-top: 2rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-4 { margin-bottom: 1rem; }
.mb-6 { margin-bottom: 1.5rem; }
.mb-8 { margin-bottom: 2rem; }
.my-4 { margin-top: 1rem; margin-bottom: 1rem; }
.my-8 { margin-top: 2rem; margin-bottom: 2rem; }

.p-4 { padding: 1rem; }
.p-6 { padding: 1.5rem; }
.px-4 { padding-left: 1rem; padding-right: 1rem; }
.py-2 { padding-top: 0.5rem; padding-bottom: 0.5rem; }
.py-4 { padding-top: 1rem; padding-bottom: 1rem; }

.font-bold { font-weight: 700; }
.font-semibold { font-weight: 600; }
.font-medium { font-weight: 500; }
.text-sm { font-size: 0.875rem; }
.text-lg { font-size: 1.125rem; }
.text-xl { font-size: 1.25rem; }
.text-2xl { font-size: 1.5rem; }
.text-3xl { font-size: 1.875rem; }

.text-primary { color: var(--primary-dark); }
.text-gold { color: var(--gold-dark); }
.text-red { color: var(--red); }
.text-muted { color: var(--text-secondary); }

.bg-card { background-color: var(--card); }
.bg-primary-light { background-color: var(--primary-light); }
.bg-gold-light { background-color: var(--gold-light); }
.bg-red-light { background-color: var(--red-light); }

.rounded { border-radius: var(--radius); }
.rounded-lg { border-radius: var(--radius-lg); }
.shadow { box-shadow: var(--shadow); }
.shadow-md { box-shadow: var(--shadow-md); }

.w-full { width: 100%; }

/* ==========================================================================
   HEADER
   ========================================================================== */
.site-header {
    background-color: var(--card);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 50;
    backdrop-filter: blur(8px);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1rem;
    max-width: var(--max-width);
    margin: 0 auto;
    min-height: 60px;
}

.header-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-dark);
    white-space: nowrap;
}

.header-logo svg {
    width: 32px;
    height: 32px;
    color: var(--primary);
}

.header-nav {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.header-nav a {
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    padding: 0.375rem 0;
    border-bottom: 2px solid transparent;
    transition: color var(--transition), border-color var(--transition);
}

.header-nav a:hover,
.header-nav a.active {
    color: var(--primary-dark);
    border-bottom-color: var(--primary);
}

/* Language Dropdown */
.lang-dropdown {
    position: relative;
    display: inline-flex;
    align-items: center;
}

.lang-dropdown-toggle {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.375rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background-color: var(--card);
    cursor: pointer;
    font-size: 0.8125rem;
    color: var(--text);
    transition: border-color var(--transition), box-shadow var(--transition);
    white-space: nowrap;
}

.lang-dropdown-toggle:hover {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1);
}

.lang-dropdown-toggle .flag-icon {
    width: 20px;
    height: 15px;
    border-radius: 2px;
    object-fit: cover;
    flex-shrink: 0;
}

.lang-dropdown-toggle .chevron {
    width: 14px;
    height: 14px;
    transition: transform var(--transition);
}

.lang-dropdown.open .lang-dropdown-toggle .chevron {
    transform: rotate(180deg);
}

.lang-dropdown-menu {
    position: absolute;
    top: calc(100% + 0.25rem);
    right: 0;
    z-index: 100;
    min-width: 180px;
    max-height: 320px;
    overflow-y: auto;
    background-color: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
}

.lang-dropdown.open .lang-dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.lang-dropdown-menu a {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.75rem;
    font-size: 0.8125rem;
    color: var(--text);
    text-decoration: none;
    border-bottom: none;
    transition: background-color var(--transition);
}

.lang-dropdown-menu a:hover {
    background-color: var(--primary-lighter);
    color: var(--primary-dark);
}

.lang-dropdown-menu a.active {
    background-color: var(--primary-light);
    color: var(--primary-dark);
    font-weight: 600;
}

.lang-dropdown-menu a .flag-icon {
    width: 20px;
    height: 15px;
    border-radius: 2px;
    object-fit: cover;
    flex-shrink: 0;
}

.lang-name {
    flex: 1;
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    color: var(--text);
    border-radius: var(--radius-sm);
}

.mobile-menu-toggle:hover {
    background-color: var(--bg-alt);
}

.mobile-menu-toggle svg {
    width: 24px;
    height: 24px;
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.site-footer {
    background-color: #1F2937;
    color: #D1D5DB;
    padding: 3rem 1rem 1.5rem;
    margin-top: auto;
}

.footer-inner {
    max-width: var(--max-width);
    margin: 0 auto;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-col h3 {
    color: #F9FAFB;
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.footer-col p {
    font-size: 0.875rem;
    line-height: 1.7;
}

.footer-col ul {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.footer-col ul li a {
    color: #9CA3AF;
    font-size: 0.875rem;
    transition: color var(--transition);
}

.footer-col ul li a:hover {
    color: var(--primary);
}

.footer-bottom {
    border-top: 1px solid #374151;
    padding-top: 1.5rem;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    font-size: 0.8125rem;
    color: #6B7280;
}

.footer-bottom a {
    color: #9CA3AF;
}

.footer-bottom a:hover {
    color: var(--primary);
}

/* ==========================================================================
   CALENDAR
   ========================================================================== */
.calendar-section {
    padding: 2rem 0;
}

.calendar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.calendar-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text);
}

.calendar-nav {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.calendar-nav-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background-color: var(--card);
    color: var(--text);
    cursor: pointer;
    transition: all var(--transition);
    font-size: 1.125rem;
}

.calendar-nav-btn:hover {
    background-color: var(--primary-lighter);
    border-color: var(--primary);
    color: var(--primary-dark);
}

.calendar-nav-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.calendar-nav-btn svg {
    width: 18px;
    height: 18px;
}

.today-btn {
    padding: 0.5rem 1rem;
    border: 1px solid var(--primary);
    border-radius: var(--radius);
    background-color: var(--primary-lighter);
    color: var(--primary-dark);
    font-size: 0.8125rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition);
}

.today-btn:hover {
    background-color: var(--primary);
    color: white;
}

/* Calendar Grid */
.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 1px;
    background-color: var(--border);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

/* Weekday Headers */
.calendar-weekday {
    background-color: var(--primary-lighter);
    padding: 0.75rem 0.25rem;
    text-align: center;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--primary-dark);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.calendar-weekday.weekend {
    color: var(--red);
    background-color: var(--red-light);
}

/* Day Cells */
.calendar-day {
    background-color: var(--card);
    min-height: 100px;
    padding: 0.375rem;
    display: flex;
    flex-direction: column;
    cursor: pointer;
    transition: background-color var(--transition);
    position: relative;
}

.calendar-day:hover {
    background-color: var(--primary-lighter);
}

.calendar-day.empty {
    background-color: var(--bg);
    cursor: default;
}

.calendar-day.empty:hover {
    background-color: var(--bg);
}

.calendar-day.today {
    box-shadow: inset 0 0 0 2px var(--primary);
    border-radius: 4px;
    z-index: 1;
}

/* Day type colors */
.calendar-day.hoang-dao,
.calendar-day.good-day {
    background-color: #f0fdf4;
    border-left: 3px solid var(--primary);
}

.calendar-day.hac-dao,
.calendar-day.bad-day {
    background-color: #fef2f2;
    border-left: 3px solid var(--red);
}

.calendar-day.neutral-day {
    background-color: #fffbeb;
    border-left: 3px solid var(--gold);
}

.calendar-day.today.hoang-dao {
    box-shadow: inset 0 0 0 2px var(--primary);
}

.calendar-day.today.hac-dao {
    box-shadow: inset 0 0 0 2px var(--red);
}

/* Solar date */
.solar-date {
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--text);
    text-align: right;
    margin-bottom: 0.125rem;
}

.calendar-day.weekend .solar-date {
    color: var(--red);
}

.calendar-day.today .solar-date {
    color: var(--primary-dark);
    background-color: var(--primary);
    color: white;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-left: auto;
}

/* Lunar date */
.lunar-date {
    font-size: 0.6875rem;
    color: var(--text-secondary);
    text-align: right;
    font-weight: 500;
}

/* Day label (Hoàng đạo / Hắc đạo) */
.day-label {
    font-size: 0.625rem;
    font-weight: 600;
    text-align: center;
    margin-top: auto;
    padding: 2px 4px;
    border-radius: 3px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.day-label.good {
    background-color: #D1FAE5;
    color: #065F46;
}

.day-label.bad {
    background-color: #FEE2E2;
    color: #991B1B;
}

.day-label.neutral {
    background-color: #FEF3C7;
    color: #92400E;
}

/* Day indicator icons */
.day-indicators {
    display: flex;
    gap: 2px;
    justify-content: flex-end;
    margin-top: 2px;
}

.day-indicator {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    flex-shrink: 0;
}

.day-indicator.good {
    background-color: var(--primary);
}

.day-indicator.bad {
    background-color: var(--red);
}

/* Extra day info tooltip */
.day-info {
    font-size: 0.625rem;
    color: var(--text-muted);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    text-align: center;
}

/* Calendar legend */
.calendar-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-top: 1rem;
    padding: 0.75rem 1rem;
    background-color: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 0.8125rem;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.375rem;
}

.legend-color {
    width: 14px;
    height: 14px;
    border-radius: 3px;
    flex-shrink: 0;
}

.legend-color.good {
    background-color: var(--primary);
}

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

.legend-color.neutral {
    background-color: var(--gold);
}

/* ==========================================================================
   DATE PICKER / CONVERTER
   ========================================================================== */
.converter-form {
    background-color: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow);
}

.form-group {
    margin-bottom: 1rem;
}

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 0.375rem;
}

.form-input,
.form-select {
    width: 100%;
    padding: 0.625rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 0.9375rem;
    color: var(--text);
    background-color: var(--card);
    transition: border-color var(--transition), box-shadow var(--transition);
    font-family: inherit;
}

.form-input:focus,
.form-select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.15);
}

.form-input::placeholder {
    color: var(--text-muted);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    border: 1px solid transparent;
    border-radius: var(--radius);
    font-size: 0.9375rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    font-family: inherit;
    text-decoration: none;
    white-space: nowrap;
}

.btn-primary {
    background-color: var(--primary);
    color: white;
    border-color: var(--primary);
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    border-color: var(--primary-dark);
    color: white;
}

.btn-secondary {
    background-color: var(--card);
    color: var(--text);
    border-color: var(--border);
}

.btn-secondary:hover {
    background-color: var(--bg-alt);
    border-color: var(--border-dark);
}

.btn-sm {
    padding: 0.375rem 0.75rem;
    font-size: 0.8125rem;
}

.btn-lg {
    padding: 0.75rem 1.75rem;
    font-size: 1.0625rem;
}

.converter-result {
    margin-top: 1.5rem;
    padding: 1rem;
    background-color: var(--primary-lighter);
    border: 1px solid var(--primary-light);
    border-radius: var(--radius);
}

.converter-result h3 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--primary-dark);
    margin-bottom: 0.5rem;
}

.converter-result p {
    font-size: 0.9375rem;
    color: var(--text);
    margin-bottom: 0.25rem;
}

/* ==========================================================================
   ARTICLE CARDS
   ========================================================================== */
.articles-section {
    padding: 2rem 0;
}

.section-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--text);
}

.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.article-card {
    background-color: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: transform var(--transition), box-shadow var(--transition);
    display: flex;
    flex-direction: column;
}

.article-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.article-card-img {
    width: 100%;
    height: 180px;
    object-fit: cover;
    background-color: var(--bg-alt);
}

.article-card-body {
    padding: 1.25rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.article-card-category {
    display: inline-block;
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--primary-dark);
    background-color: var(--primary-lighter);
    padding: 0.1875rem 0.5rem;
    border-radius: 9999px;
    margin-bottom: 0.5rem;
    width: fit-content;
}

.article-card-title {
    font-size: 1.0625rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 0.5rem;
    line-height: 1.4;
}

.article-card-title a {
    color: inherit;
}

.article-card-title a:hover {
    color: var(--primary-dark);
}

.article-card-excerpt {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.6;
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.article-card-meta {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-top: 1rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--border);
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* Single Article */
.article-single {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

.article-single h1 {
    font-size: 2rem;
    font-weight: 800;
    color: var(--text);
    margin-bottom: 0.75rem;
    line-height: 1.3;
}

.article-single .article-meta {
    margin-bottom: 2rem;
}

.article-content {
    font-size: 1.0625rem;
    line-height: 1.8;
    color: var(--text);
}

.article-content h2 {
    font-size: 1.375rem;
    font-weight: 700;
    margin-top: 2rem;
    margin-bottom: 0.75rem;
}

.article-content h3 {
    font-size: 1.125rem;
    font-weight: 700;
    margin-top: 1.5rem;
    margin-bottom: 0.5rem;
}

.article-content p {
    margin-bottom: 1rem;
}

.article-content ul,
.article-content ol {
    margin-bottom: 1rem;
    padding-left: 1.5rem;
}

.article-content ul {
    list-style: disc;
}

.article-content ol {
    list-style: decimal;
}

.article-content li {
    margin-bottom: 0.375rem;
}

.article-content blockquote {
    border-left: 4px solid var(--primary);
    padding-left: 1rem;
    margin: 1.5rem 0;
    color: var(--text-secondary);
    font-style: italic;
}

.article-content img {
    border-radius: var(--radius);
    margin: 1.5rem 0;
}

.article-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
}

.article-content th,
.article-content td {
    padding: 0.75rem;
    border: 1px solid var(--border);
    text-align: left;
}

.article-content th {
    background-color: var(--bg-alt);
    font-weight: 600;
}

/* ==========================================================================
   HERO / HOME PAGE
   ========================================================================== */
.hero {
    background: linear-gradient(135deg, var(--primary-lighter) 0%, #F0FDF4 50%, #FFFBEB 100%);
    padding: 4rem 1rem;
    text-align: center;
}

.hero h1 {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--text);
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 2rem;
}

.hero-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
}

/* Feature Cards */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    padding: 2rem 0;
}

.feature-card {
    background-color: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    text-align: center;
    box-shadow: var(--shadow);
    transition: transform var(--transition), box-shadow var(--transition);
}

.feature-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.feature-card-icon {
    width: 56px;
    height: 56px;
    background-color: var(--primary-lighter);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    color: var(--primary);
}

.feature-card-icon svg {
    width: 28px;
    height: 28px;
}

.feature-card h3 {
    font-size: 1.0625rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.feature-card p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ==========================================================================
   STATIC PAGES (TOS, Privacy)
   ========================================================================== */
.static-page {
    max-width: 800px;
    margin: 0 auto;
    padding: 3rem 1rem;
}

.static-page h1 {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
}

.static-page h2 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-top: 2rem;
    margin-bottom: 0.75rem;
}

.static-page p {
    margin-bottom: 1rem;
    line-height: 1.8;
}

.static-page ul,
.static-page ol {
    margin-bottom: 1rem;
    padding-left: 1.5rem;
}

.static-page ul { list-style: disc; }
.static-page ol { list-style: decimal; }

.static-page li {
    margin-bottom: 0.5rem;
}

/* ==========================================================================
   GOOD HOURS TABLE (Giờ Hoàng Đạo)
   ========================================================================== */
.good-hours-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9375rem;
}

.good-hours-table th {
    background-color: var(--primary-dark);
    color: white;
    padding: 0.75rem 1rem;
    text-align: center;
    font-weight: 600;
}

.good-hours-table td {
    padding: 0.75rem 1rem;
    border: 1px solid var(--border);
    text-align: center;
}

.good-hours-table tr:nth-child(even) {
    background-color: var(--bg);
}

.good-hours-table .hour-good {
    color: #065F46;
    font-weight: 600;
}

.good-hours-table .hour-bad {
    color: var(--red-dark);
    font-weight: 600;
}

/* ==========================================================================
   ZODIAC / TU VI
   ========================================================================== */
.zodiac-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 1rem;
}

.zodiac-card {
    background-color: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1rem;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition);
}

.zodiac-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-md);
}

.zodiac-card.active {
    border-color: var(--primary);
    background-color: var(--primary-lighter);
}

.zodiac-card-emoji {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.zodiac-card-name {
    font-size: 0.875rem;
    font-weight: 600;
}

/* ==========================================================================
   BREADCRUMB
   ========================================================================== */
.breadcrumb {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.375rem;
    font-size: 0.8125rem;
    color: var(--text-muted);
    padding: 1rem 0;
}

.breadcrumb a {
    color: var(--text-secondary);
}

.breadcrumb a:hover {
    color: var(--primary-dark);
}

.breadcrumb-separator {
    color: var(--text-muted);
    user-select: none;
}

/* ==========================================================================
   ALERTS / NOTIFICATIONS
   ========================================================================== */
.alert {
    padding: 1rem 1.25rem;
    border-radius: var(--radius);
    margin-bottom: 1rem;
    font-size: 0.9375rem;
}

.alert-success {
    background-color: var(--primary-lighter);
    border: 1px solid var(--primary-light);
    color: #065F46;
}

.alert-error {
    background-color: var(--red-light);
    border: 1px solid #FECACA;
    color: #991B1B;
}

.alert-warning {
    background-color: var(--gold-light);
    border: 1px solid #FDE68A;
    color: #92400E;
}

.alert-info {
    background-color: #EFF6FF;
    border: 1px solid #BFDBFE;
    color: #1E40AF;
}

/* ==========================================================================
   LOADING / SPINNER
   ========================================================================== */
.spinner {
    display: inline-block;
    width: 24px;
    height: 24px;
    border: 3px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

.spinner-lg {
    width: 40px;
    height: 40px;
    border-width: 4px;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading-overlay {
    position: absolute;
    inset: 0;
    background-color: rgba(255, 255, 255, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
    border-radius: var(--radius-lg);
}

/* ==========================================================================
   PAGINATION
   ========================================================================== */
.pagination {
    display: flex;
    justify-content: center;
    gap: 0.25rem;
    margin-top: 2rem;
}

.pagination a,
.pagination span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 0.5rem;
    font-size: 0.875rem;
    font-weight: 500;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background-color: var(--card);
    color: var(--text);
    text-decoration: none;
    transition: all var(--transition);
}

.pagination a:hover {
    background-color: var(--primary-lighter);
    border-color: var(--primary);
    color: var(--primary-dark);
}

.pagination .active {
    background-color: var(--primary);
    border-color: var(--primary);
    color: white;
}

/* ==========================================================================
   PRINT STYLES
   ========================================================================== */
@media print {
    body {
        background: white;
        color: black;
        font-size: 12pt;
    }

    .site-header,
    .site-footer,
    .mobile-menu-toggle,
    .lang-dropdown,
    .calendar-nav,
    .hero-buttons,
    .no-print {
        display: none !important;
    }

    .calendar-grid {
        border: 1px solid #000;
        break-inside: avoid;
    }

    .calendar-day {
        min-height: 60px;
        border: 1px solid #ccc;
    }

    .calendar-day.hoang-dao,
    .calendar-day.good-day {
        background-color: #f0fdf4 !important;
        -webkit-print-color-adjust: exact;
        print-color-adjust: exact;
    }

    .calendar-day.hac-dao,
    .calendar-day.bad-day {
        background-color: #fef2f2 !important;
        -webkit-print-color-adjust: exact;
        print-color-adjust: exact;
    }

    a {
        color: #000;
        text-decoration: none;
    }

    .container {
        max-width: 100%;
        padding: 0;
    }
}

/* ==========================================================================
   RESPONSIVE
   ========================================================================== */

/* Tablet and below (1024px) */
@media (max-width: 1024px) {
    .header-nav {
        gap: 1rem;
    }

    .articles-grid {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    }
}

/* Small tablet and large phones (768px) */
@media (max-width: 768px) {
    .header-inner {
        flex-wrap: wrap;
    }

    .header-nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--card);
        border-bottom: 1px solid var(--border);
        box-shadow: var(--shadow-md);
        flex-direction: column;
        padding: 1rem;
        gap: 0.75rem;
        z-index: 100;
    }

    .header-nav.open {
        display: flex;
    }

    .header-nav a {
        padding: 0.5rem 0;
        border-bottom: none;
        font-size: 1rem;
    }

    .mobile-menu-toggle {
        display: block;
    }

    .calendar-day {
        min-height: 80px;
    }

    .hero h1 {
        font-size: 1.75rem;
    }

    .hero p {
        font-size: 1rem;
    }

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

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

    .lang-dropdown-menu {
        right: auto;
        left: 50%;
        transform: translate(-50%, -8px);
    }

    .lang-dropdown.open .lang-dropdown-menu {
        transform: translate(-50%, 0);
    }

    .calendar-weekday {
        font-size: 0.65rem;
        padding: 0.5rem 0.125rem;
    }

    .zodiac-grid {
        grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    }
}

/* Small phones (480px) */
@media (max-width: 480px) {
    .calendar-title {
        font-size: 1.125rem;
    }

    .calendar-day {
        min-height: 60px;
        padding: 0.25rem;
    }

    .solar-date {
        font-size: 0.75rem;
    }

    .lunar-date {
        font-size: 0.625rem;
    }

    .day-label {
        font-size: 0.5625rem;
    }

    .calendar-nav-btn {
        width: 32px;
        height: 32px;
        font-size: 0.875rem;
    }

    .today-btn {
        font-size: 0.75rem;
        padding: 0.375rem 0.75rem;
    }

    .hero {
        padding: 2.5rem 1rem;
    }

    .hero h1 {
        font-size: 1.5rem;
    }

    .hero p {
        font-size: 0.9375rem;
    }

    .btn {
        padding: 0.5rem 1rem;
        font-size: 0.875rem;
    }

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

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

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

    .article-single h1 {
        font-size: 1.5rem;
    }

    .calendar-weekday {
        font-size: 0.5625rem;
        padding: 0.375rem 0.1rem;
    }

    .lang-dropdown-toggle {
        font-size: 0.75rem;
        padding: 0.25rem 0.5rem;
    }

    .calendar-legend {
        font-size: 0.6875rem;
        gap: 0.5rem;
        flex-wrap: wrap;
    }

    .converter-form {
        padding: 1rem;
    }
}

/* Large screens (1280px+) */
@media (min-width: 1280px) {
    .container {
        padding-left: 2rem;
        padding-right: 2rem;
    }
}