/* Base Design System & CSS Reset */
:root {
    --primary-color: #d4af37; /* Metallic Gold */
    --primary-light: #f3e5ab; /* Soft Cream Gold */
    --primary-dark: #aa7c11; /* Dark Gold */
    --secondary-color: #c92a2a; /* Traditional Crimson Red */
    --accent-blue: #1c7ed6; /* Soft Blue */
    
    /* Dark Mode Defaults */
    --bg-dark: #121214; /* Deep Charcoal Black */
    --bg-sidebar: rgba(18, 18, 20, 0.85); /* Sidebar translucency */
    --bg-card: rgba(30, 30, 35, 0.6); /* Translucent Card Black */
    --bg-hover: rgba(255, 255, 255, 0.03); /* Hover effect */
    --border-color: rgba(212, 175, 55, 0.15); /* Soft Gold border */
    --text-main: #f8f9fa; /* Off-white */
    --text-muted: #adb5bd; /* Slate Gray */
    --shadow-main: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
    --card-overlay: linear-gradient(to bottom, rgba(18, 18, 20, 0.3) 0%, rgba(18, 18, 20, 0.95) 90%);
    --day-num-grad: linear-gradient(180deg, #ffffff 0%, #e0e0e0 40%, var(--primary-light) 100%);
    --day-card-border: var(--primary-color);
    --zodiac-bg: rgba(0, 0, 0, 0.3);
    --zodiac-filter: invert(0.85) sepia(0.8) saturate(3) hue-rotate(5deg);
    --card-item-bg: rgba(0, 0, 0, 0.4);
    --header-bg: rgba(18, 18, 20, 0.9);
    --mobile-nav-bg: rgba(18, 18, 20, 0.95);
    --date-indicator-filter: invert(0.8) sepia(1) saturate(5) hue-rotate(5deg);

    /* Themeable Day Quality Colors */
    --color-bao: #ff6b6b;
    --color-nghia: #ffa984;
    --color-che: #a0a0a0;
    --color-phat: #868e96;
    --color-chuyen: #e9ecef;

    /* Themeable Five Elements Colors & Shadows */
    --element-kim: #f1f3f5;
    --element-thuy: #339af0;
    --element-moc: #51cf66;
    --element-hoa: #ff6b6b;
    --element-tho: #fcc419;
    --element-shadow-kim: 0 0 8px rgba(255, 255, 255, 0.3);
    --element-shadow-thuy: 0 0 8px rgba(51, 154, 240, 0.3);
    --element-shadow-moc: 0 0 8px rgba(81, 207, 102, 0.3);
    --element-shadow-hoa: 0 0 8px rgba(255, 107, 107, 0.3);
    --element-shadow-tho: 0 0 8px rgba(252, 196, 25, 0.3);

    /* Weekend colors */
    --color-sat: #5bc0be;
    --color-sun: #ff6b6b;

    /* Tiết khí center color */
    --tiet-khi-color: #ffb900;
    
    --font-primary: 'Outfit', sans-serif;
    --font-heading: 'Quicksand', sans-serif;
    --backdrop-blur: blur(12px);
    --transition-speed: 0.3s;
}

body.light-theme {
    /* Light Mode Overrides */
    --bg-dark: #f1f3f5; /* Light grey */
    --bg-sidebar: rgba(248, 249, 250, 0.9); /* Sidebar translucency */
    --bg-card: rgba(255, 255, 255, 0.75); /* Translucent Card White */
    --bg-hover: rgba(0, 0, 0, 0.04); /* Hover effect */
    --border-color: rgba(170, 124, 17, 0.25); /* Darker Gold border */
    --text-main: #212529; /* Dark Slate */
    --text-muted: #495057; /* Slate Gray */
    --shadow-main: 0 8px 32px 0 rgba(0, 0, 0, 0.08);
    --card-overlay: linear-gradient(to bottom, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0.95) 95%);
    --day-num-grad: linear-gradient(180deg, #121214 0%, #495057 50%, var(--primary-dark) 100%);
    --day-card-border: var(--primary-dark);
    --zodiac-bg: rgba(255, 255, 255, 0.5);
    --zodiac-filter: invert(0.15) sepia(0.8) saturate(2) hue-rotate(15deg);
    --card-item-bg: rgba(0, 0, 0, 0.05);
    --header-bg: rgba(248, 249, 250, 0.95);
    --mobile-nav-bg: rgba(248, 249, 250, 0.98);
    --date-indicator-filter: invert(0.2) sepia(1) saturate(5) hue-rotate(5deg);

    /* Light Mode Gold Overrides */
    --primary-color: #aa7c11; /* Dark Gold for Light Mode */
    --primary-light: #7c5a00; /* Dark Bronze/Brown Gold for high contrast text */

    /* Light Mode Day Quality Colors */
    --color-bao: #c92a2a;
    --color-nghia: #d9480f;
    --color-che: #495057;
    --color-phat: #212529;
    --color-chuyen: #6c757d;

    /* Light Mode Five Elements Colors & Shadows */
    --element-kim: #495057;
    --element-thuy: #1c7ed6;
    --element-moc: #2b8a3e;
    --element-hoa: #c92a2a;
    --element-tho: #a97500;
    --element-shadow-kim: none;
    --element-shadow-thuy: none;
    --element-shadow-moc: none;
    --element-shadow-hoa: none;
    --element-shadow-tho: none;

    /* Light Mode Weekend colors */
    --color-sat: #106ba3;
    --color-sun: #c92a2a;

    /* Light Mode Tiết khí color */
    --tiet-khi-color: #b58000;
}

/* Light Mode Card & Info Overrides */
body.light-theme .hour-card.hac-dao {
    background: rgba(0, 0, 0, 0.03);
    border-color: rgba(0, 0, 0, 0.08);
}
body.light-theme .hour-card.hac-dao .hour-badge {
    background: rgba(0, 0, 0, 0.05);
    color: var(--text-muted);
    border: 1px solid rgba(0, 0, 0, 0.08);
}
body.light-theme .detail-header-card {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.9), rgba(170, 124, 17, 0.08));
    border: 1px solid var(--border-color);
}
body.light-theme .footer-credit {
    color: rgba(0, 0, 0, 0.35);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-primary);
    background-color: var(--bg-dark);
    color: var(--text-main);
    min-height: 100vh;
    overflow-x: hidden;
    background-image: 
        radial-gradient(circle at 10% 20%, rgba(128, 0, 32, 0.15) 0%, transparent 40%),
        radial-gradient(circle at 90% 80%, rgba(212, 175, 55, 0.1) 0%, transparent 40%);
    background-attachment: fixed;
}

/* App Container Layout */
.app-container {
    display: flex;
    min-height: 100vh;
}

/* Sidebar Styling (Desktop) */
.sidebar {
    width: 320px;
    background: var(--bg-sidebar);
    border-right: 1px solid var(--border-color);
    backdrop-filter: var(--backdrop-blur);
    padding: 2rem 1.5rem;
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    z-index: 100;
}

.logo-brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-area {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 2.5rem;
}

.btn-theme-toggle, .btn-theme-toggle-mobile {
    background: var(--card-item-bg);
    border: 1px solid var(--border-color);
    color: var(--primary-color);
    width: 36px;
    height: 36px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.btn-theme-toggle:hover, .btn-theme-toggle-mobile:hover {
    background: var(--primary-color);
    color: var(--bg-dark);
    border-color: var(--primary-color);
    transform: rotate(30deg);
}

.btn-mobile-date-picker-trigger {
    background: var(--card-item-bg);
    border: 1px solid var(--border-color);
    color: var(--primary-color);
    width: 36px;
    height: 36px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    transition: all 0.2s ease;
}

.btn-mobile-date-picker-trigger:hover {
    background: var(--primary-color);
    color: var(--bg-dark);
    border-color: var(--primary-color);
}

.mobile-date-input {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
    -webkit-appearance: none;
}

.header-actions-mobile {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-img {
    width: 42px;
    height: auto;
    filter: drop-shadow(0 0 8px rgba(212, 175, 55, 0.5));
}

.logo-text {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.5rem;
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary-color) 50%, var(--primary-dark) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-menu {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 2rem;
}

.nav-item {
    background: transparent;
    border: 1px solid transparent;
    color: var(--text-muted);
    padding: 12px 16px;
    border-radius: 12px;
    text-align: left;
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1rem;
    display: flex;
    align-items: center;
    gap: 15px;
    cursor: pointer;
    transition: all var(--transition-speed) ease;
}

.nav-item i {
    font-size: 1.2rem;
    width: 24px;
    text-align: center;
}

.nav-item:hover {
    color: var(--primary-color);
    background: var(--bg-hover);
}

.nav-item.active {
    color: var(--bg-dark);
    background: linear-gradient(135deg, var(--primary-light), var(--primary-color));
    box-shadow: 0 4px 15px rgba(212, 175, 55, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.1);
    font-weight: 700;
}

.quick-selector {
    margin-top: auto;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.control-group {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
}

.btn-primary {
    flex-grow: 1;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border: none;
    color: var(--bg-dark);
    font-family: var(--font-heading);
    font-weight: 700;
    padding: 10px 14px;
    border-radius: 10px;
    cursor: pointer;
    transition: transform 0.2s ease, opacity 0.2s ease;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(212, 175, 55, 0.4);
}

.btn-icon {
    background: var(--card-item-bg);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    width: 40px;
    height: 40px;
    border-radius: 10px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

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

.date-picker-wrapper {
    width: 100%;
}

.custom-date-picker {
    width: 100%;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    font-family: var(--font-primary);
    padding: 10px;
    border-radius: 10px;
    outline: none;
    cursor: pointer;
}

.custom-date-picker::-webkit-calendar-picker-indicator {
    filter: var(--date-indicator-filter);
}

.footer-credit {
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.3);
    text-align: center;
    margin-top: 15px;
    line-height: 1.4;
}

/* Main Content Styling */
.main-content {
    flex-grow: 1;
    margin-left: 320px;
    padding: 2.5rem;
    max-width: 1200px;
}

.mobile-header {
    display: none;
}

.mobile-nav {
    display: none;
}

/* Tab Views management */
.tab-content {
    display: none;
    animation: fadeIn 0.4s ease;
}

.tab-content.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Glassmorphism Cards */
.glass-panel {
    background: var(--bg-card);
    backdrop-filter: var(--backdrop-blur);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 24px;
    margin-bottom: 24px;
    box-shadow: var(--shadow-main);
}

/* ----------------- LỊCH NGÀY (DAY VIEW) ----------------- */
.day-card-container {
    display: flex;
    justify-content: center;
    margin-bottom: 24px;
}

.day-card {
    width: 100%;
    max-width: 500px;
    min-height: 480px;
    border-radius: 24px;
    overflow: hidden;
    position: relative;
    border: 2px solid var(--day-card-border);
    box-shadow: var(--shadow-main);
    display: flex;
    flex-direction: column;
}

.day-card-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: 75% auto;
    background-repeat: no-repeat;
    background-position: center;
    filter: blur(2px) opacity(0.28) saturate(1.2);
    z-index: 2; /* Moved above overlay so it is not washed out */
    transition: background-image 0.5s ease;
}

.light-theme .day-card-bg {
    filter: blur(2px) opacity(0.12) saturate(1.0);
}

.day-card-advice {
    margin: 10px 0 15px 0;
    display: flex;
    flex-direction: column;
    gap: 8px;
    width: 100%;
    z-index: 4;
}

.day-card-advice .advice-line {
    font-size: 0.95rem;
    padding: 10px 14px;
    line-height: 1.4;
    gap: 12px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.day-card-advice .advice-good {
    background: rgba(46, 204, 113, 0.08);
    border: 1px solid rgba(46, 204, 113, 0.2);
}

.day-card-advice .advice-bad {
    background: rgba(231, 76, 60, 0.08);
    border: 1px solid rgba(231, 76, 60, 0.2);
}

.day-card-advice .advice-tag-good {
    background: #2ecc71;
    color: #121214;
    font-size: 0.7rem;
    font-weight: 800;
    padding: 3px 8px;
    border-radius: 4px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    flex-shrink: 0;
}

.day-card-advice .advice-tag-bad {
    background: #e74c3c;
    color: #ffffff;
    font-size: 0.7rem;
    font-weight: 800;
    padding: 3px 8px;
    border-radius: 4px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    flex-shrink: 0;
}

.day-card-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--card-overlay);
    z-index: 1; /* Moved below background image */
}

.day-card-content {
    position: relative;
    z-index: 3;
    padding: 24px;
    height: 100%;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.solar-header {
    text-align: center;
    margin-bottom: 10px;
}

.solar-month-year {
    font-family: var(--font-heading);
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--primary-light);
    letter-spacing: 1px;
}

.solar-day-body {
    text-align: center;
    margin: 15px 0;
}

.solar-day-number {
    font-size: 6.5rem;
    font-weight: 800;
    line-height: 1;
    font-family: var(--font-heading);
    color: #ffffff;
    -webkit-text-fill-color: #ffffff;
    background: transparent;
    text-shadow: var(--shadow-main);
}

.light-theme .day-card:not(.saturday):not(.sunday) .solar-day-number {
    color: #121214;
    -webkit-text-fill-color: #121214;
    background: transparent;
}

.solar-day-week {
    font-size: 1.6rem;
    font-weight: 700;
    margin-top: 5px;
    letter-spacing: 0.5px;
}

/* Day Color Themes */
.day-card.saturday { border-color: var(--accent-blue); }
.day-card.saturday .solar-day-week, .day-card.saturday .solar-day-number { color: var(--color-sat); -webkit-text-fill-color: var(--color-sat); }
.day-card.sunday { border-color: var(--secondary-color); }
.day-card.sunday .solar-day-week, .day-card.sunday .solar-day-number { color: var(--color-sun); -webkit-text-fill-color: var(--color-sun); }

.day-quality-badge {
    align-self: center;
    background: var(--card-item-bg);
    border: 1px solid var(--primary-color);
    padding: 6px 16px;
    border-radius: 50px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    font-size: 0.95rem;
    text-transform: capitalize;
    box-shadow: var(--shadow-main);
    margin-bottom: 20px;
}

.star-icon {
    font-size: 0.9rem;
    filter: drop-shadow(0 0 4px var(--primary-color));
}

.lunar-quick-summary {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 14px 18px;
    border-radius: 16px;
    margin-bottom: 20px;
}

.lunar-main-day {
    display: flex;
    flex-direction: column;
}

.lunar-num {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--primary-light);
    line-height: 1.1;
}

.lunar-month-name {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 600;
    text-transform: uppercase;
}

.zodiac-icon-container {
    width: 60px;
    height: 60px;
    background: var(--zodiac-bg);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border-color);
}

.zodiac-svg-img {
    width: 40px;
    height: 40px;
    filter: var(--zodiac-filter);
}

.canchi-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
    margin-bottom: 20px;
}

.canchi-item {
    background: var(--card-item-bg);
    border: 1px solid var(--border-color);
    padding: 8px;
    border-radius: 12px;
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.canchi-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
}

.canchi-val {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--text-main);
}

.metadata-footer {
    display: flex;
    justify-content: space-around;
    align-items: center;
    font-size: 0.85rem;
    color: var(--text-muted);
    border-top: 1px solid var(--border-color);
    padding-top: 15px;
    gap: 8px;
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 6px;
}

.meta-item i {
    color: var(--primary-color);
}

.meta-item.highlight-truc {
    background: rgba(212, 175, 55, 0.1);
    color: var(--primary-light);
    padding: 4px 10px;
    border-radius: 8px;
    border: 1px solid rgba(212, 175, 55, 0.2);
}

/* Card Header styling */
.card-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
}

.card-header h2 {
    font-family: var(--font-heading);
    font-size: 1.35rem;
    margin: 0;
}

.card-header .card-icon {
    font-size: 1.35rem;
}

/* Info Card / Advice Panel */
.info-card h2 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.card-icon {
    color: var(--primary-color);
}

.highlight {
    color: var(--primary-light);
    font-weight: 700;
    text-transform: uppercase;
}

.advice-container {
    margin-top: 12px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.advice-line {
    font-size: 1.35rem; /* Large font size to fill the card */
    line-height: 1.7;
    color: var(--text-main);
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 20px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.advice-good {
    background: rgba(46, 204, 113, 0.06);
    border: 1px solid rgba(46, 204, 113, 0.15);
}

.advice-bad {
    background: rgba(231, 76, 60, 0.06);
    border: 1px solid rgba(231, 76, 60, 0.15);
}

.advice-tag-good {
    background: #2ecc71;
    color: #121214;
    font-size: 0.8rem;
    font-weight: 800;
    padding: 4px 10px;
    border-radius: 6px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    flex-shrink: 0;
}

.advice-tag-bad {
    background: #e74c3c;
    color: #ffffff;
    font-size: 0.8rem;
    font-weight: 800;
    padding: 4px 10px;
    border-radius: 6px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    flex-shrink: 0;
}

.detail-advice-container {
    margin-top: 10px;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.detail-advice-container .advice-line {
    font-size: 1.15rem; /* Slightly smaller for detail panel header compatibility */
    padding: 12px 16px;
    height: 100%;
    box-sizing: border-box;
    border-left: none;
}

.detail-advice-container .advice-good {
    background: rgba(46, 204, 113, 0.09);
    border: 1px solid rgba(46, 204, 113, 0.25);
}

.detail-advice-container .advice-bad {
    background: rgba(231, 76, 60, 0.09);
    border: 1px solid rgba(231, 76, 60, 0.25);
}

.light-theme .detail-advice-container .advice-good {
    background: rgba(46, 204, 113, 0.12);
    border: 1px solid rgba(46, 204, 113, 0.25);
}

.light-theme .detail-advice-container .advice-bad {
    background: rgba(231, 76, 60, 0.12);
    border: 1px solid rgba(231, 76, 60, 0.25);
}

@media (max-width: 992px) {
    .detail-advice-container {
        grid-template-columns: 1fr;
        gap: 10px;
    }
}

/* Light theme overrides for advice items */
.light-theme .advice-line {
    background: rgba(0, 0, 0, 0.02);
    border: 1px solid rgba(0, 0, 0, 0.05);
}
.light-theme .advice-good {
    background: rgba(46, 204, 113, 0.08);
}
.light-theme .advice-bad {
    background: rgba(231, 76, 60, 0.08);
}
/* Kept dark text on green background for contrast */
.light-theme .advice-tag-good {
    color: #121214;
}

/* ----------------- CHI TIẾT NGÀY (DETAIL VIEW) ----------------- */
.detail-header-card {
    display: flex;
    flex-direction: column;
    gap: 15px;
    background: linear-gradient(135deg, rgba(30, 30, 35, 0.7), rgba(128, 0, 32, 0.1));
}

.detail-date-title h2 {
    font-family: var(--font-heading);
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: 6px;
    color: var(--primary-light);
}

.detail-date-title h3 {
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--text-muted);
}

.detail-tiet-mua {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    font-size: 0.95rem;
    background: var(--card-item-bg);
    border: 1px solid var(--border-color);
    padding: 10px 16px;
    border-radius: 12px;
}

.detail-tiet-mua span {
    display: flex;
    align-items: center;
    gap: 6px;
}

.detail-tiet-mua i {
    color: var(--primary-color);
}

.detail-truc-desc {
    font-size: 1.05rem;
    line-height: 1.5;
}

.detail-truc-desc strong {
    color: var(--primary-color);
}

.hours-section-container {
    margin-top: 30px;
}

.section-title {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
}

.section-title i {
    color: var(--primary-color);
    font-size: 1.4rem;
}

.section-title h2 {
    font-family: var(--font-heading);
    font-size: 1.35rem;
    font-weight: 700;
}

.hours-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 16px;
}

.hour-card {
    background: var(--card-item-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: transform 0.2s ease, border-color 0.2s ease;
}

.hour-card:hover {
    transform: translateY(-2px);
    border-color: var(--primary-color);
}

.hour-card.hoang-dao {
    background: rgba(212, 175, 55, 0.03);
    border: 1px solid rgba(212, 175, 55, 0.25);
    box-shadow: 0 4px 15px rgba(212, 175, 55, 0.05);
}

.hour-card.hac-dao {
    background: rgba(0, 0, 0, 0.25);
    border-color: rgba(255, 255, 255, 0.03);
}

.hour-info {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.hour-time {
    font-weight: 700;
    font-size: 1.05rem;
    color: var(--text-main);
}

.hour-can-chi {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.hour-badge {
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 6px;
}

.hour-card.hoang-dao .hour-badge {
    background: linear-gradient(135deg, var(--primary-light), var(--primary-color));
    color: var(--bg-dark);
}

.hour-card.hac-dao .hour-badge {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-muted);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

/* ----------------- LỊCH THÁNG (MONTH VIEW) ----------------- */
.calendar-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.btn-cal-change {
    background: var(--card-item-bg);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    font-family: var(--font-heading);
    font-weight: 600;
    padding: 8px 16px;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.2s ease;
}

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

.calendar-month-title {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--primary-light);
}

.month-grid-container {
    padding: 16px;
    overflow-x: auto;
}

.month-days-header {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    text-align: center;
    font-family: var(--font-heading);
    font-weight: 700;
    border-bottom: 1.5px solid var(--border-color);
    padding-bottom: 10px;
    margin-bottom: 8px;
    min-width: 600px;
}

.month-day-lbl {
    font-size: 0.95rem;
}

.month-day-lbl.cn { color: var(--color-sun); }
.month-day-lbl.t7 { color: var(--color-sat); }

.month-cells-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    grid-auto-rows: minmax(95px, 1fr);
    gap: 6px;
    min-width: 600px;
}

.calendar-cell {
    background: rgba(255, 255, 255, 0.015);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 8px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    position: relative;
    cursor: pointer;
    transition: all 0.2s ease;
    user-select: none;
}

.calendar-cell:hover {
    background: var(--bg-hover);
    border-color: var(--primary-color);
}

.calendar-cell.today {
    background: rgba(212, 175, 55, 0.08) !important;
    border: 1.5px solid var(--primary-color) !important;
    box-shadow: inset 0 0 10px rgba(212, 175, 55, 0.1);
}

.calendar-cell.selected-day {
    background: rgba(255, 255, 255, 0.08);
    box-shadow: 0 0 0 2px var(--primary-light);
}

.calendar-cell.other-month {
    opacity: 0.35;
}

/* Cell content components */
.cell-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}

.solar-day-num {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-main);
    line-height: 1;
}

.cn-day .solar-day-num { color: var(--color-sun); }
.t7-day .solar-day-num { color: var(--color-sat); }
.other-month .solar-day-num { color: var(--text-muted) !important; }

.star-indicator {
    font-size: 0.7rem;
}

.cell-center {
    font-size: 0.72rem;
    color: var(--text-muted);
    font-weight: 500;
    margin: 4px 0;
    text-transform: lowercase;
}

.cell-bottom {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    border-top: 1px solid var(--border-color);
    padding-top: 4px;
}

.cell-lunar {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--primary-light);
}

.cell-lunar.first-day {
    color: var(--color-sun);
}

.cell-truc {
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: capitalize;
}

/* Legend Styling */
.calendar-legend h3 {
    font-family: var(--font-heading);
    font-size: 1.05rem;
    margin-bottom: 12px;
    color: var(--text-muted);
}

.legend-items {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.88rem;
}

.legend-item i {
    font-size: 0.75rem;
}

/* ----------------- TRỢ GIÚP & KHỚP MỆNH ----------------- */
.text-gold {
    color: var(--primary-color) !important;
}

.highlight-underline {
    color: var(--primary-light);
    border-bottom: 1.5px dashed var(--primary-color);
    font-weight: 700;
}

.helper-text {
    font-size: 0.95rem;
    color: var(--text-muted);
    line-height: 1.5;
    margin-bottom: 20px;
}

.form-row {
    margin-bottom: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-main);
}

.input-action-group {
    display: flex;
    gap: 10px;
    max-width: 480px;
}

.input-action-group input {
    flex-grow: 1;
}

/* Compatibility results styling */
.compatibility-result-box {
    margin-top: 25px;
    background: var(--bg-card);
    border: 1.5px solid var(--border-color);
    border-radius: 16px;
    padding: 20px;
    animation: slideUp 0.3s ease;
}

.compatibility-result-box.hidden {
    display: none;
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(15px); }
    to { opacity: 1; transform: translateY(0); }
}

.result-top {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    margin-bottom: 18px;
}

.result-badge {
    flex: 1;
    max-width: 180px;
    background: var(--card-item-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 10px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.element-label {
    font-size: 0.72rem;
    color: var(--text-muted);
    text-transform: uppercase;
}

.element-name {
    font-size: 1.15rem;
    font-weight: 700;
}

/* Element color definitions */
.element-kim { color: var(--element-kim); text-shadow: var(--element-shadow-kim); }
.element-thuy { color: var(--element-thuy); text-shadow: var(--element-shadow-thuy); }
.element-moc { color: var(--element-moc); text-shadow: var(--element-shadow-moc); }
.element-hoa { color: var(--element-hoa); text-shadow: var(--element-shadow-hoa); }
.element-tho { color: var(--element-tho); text-shadow: var(--element-shadow-tho); }

.match-operator {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.result-detail {
    text-align: center;
    border-top: 1px solid var(--border-color);
    padding-top: 15px;
}

.result-detail h3 {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.result-detail p {
    font-size: 1rem;
    line-height: 1.5;
}

/* Static instructions styling */
.instruction-card h3 {
    font-family: var(--font-heading);
    font-size: 1.15rem;
    font-weight: 700;
    margin: 20px 0 10px 0;
    color: var(--primary-color);
}

.instruction-card h3:first-of-type {
    margin-top: 0;
}

.instruction-card ol {
    margin-left: 20px;
    margin-bottom: 20px;
}

.instruction-card li {
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 8px;
    color: var(--text-main);
}

.table-responsive {
    overflow-x: auto;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    margin: 15px 0;
}

.truc-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
    text-align: left;
    min-width: 500px;
}

.truc-table th, .truc-table td {
    padding: 10px 14px;
    border-bottom: 1px solid var(--border-color);
}

.truc-table th {
    background: rgba(212, 175, 55, 0.15);
    color: var(--primary-light);
    font-family: var(--font-heading);
    font-weight: 700;
}

.truc-table tr:hover td {
    background: var(--bg-hover);
}

/* ----------------- RESPONSIVENESS (MOBILE) ----------------- */
@media (max-width: 992px) {
    .app-container {
        flex-direction: column;
    }
    
    .sidebar {
        display: none; /* Hide sidebar completely on mobile */
    }
    
    .mobile-header {
        display: flex;
        align-items: center;
        justify-content: space-between;
        background: var(--header-bg);
        backdrop-filter: var(--backdrop-blur);
        border-bottom: 1px solid var(--border-color);
        padding: 12px 20px;
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 60px;
        z-index: 100;
        box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
    }
    
    .mobile-logo {
        width: 32px;
        height: auto;
    }
    
    .mobile-title {
        font-family: var(--font-heading);
        font-size: 1.15rem;
        font-weight: 700;
        background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary-color) 100%);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
    }

    .btn-today-mobile {
        background: var(--primary-color);
        border: none;
        color: var(--bg-dark);
        font-family: var(--font-heading);
        font-weight: 700;
        font-size: 0.8rem;
        padding: 6px 12px;
        border-radius: 8px;
        cursor: pointer;
    }
    
    .main-content {
        margin-left: 0;
        padding: 80px 16px 85px 16px; /* Top padding for header, bottom for nav */
        width: 100%;
    }
    
    .mobile-nav {
        display: flex;
        position: fixed;
        bottom: 0;
        left: 0;
        width: 100%;
        height: 65px;
        background: var(--mobile-nav-bg);
        backdrop-filter: var(--backdrop-blur);
        border-top: 1px solid var(--border-color);
        z-index: 100;
        box-shadow: 0 -4px 15px rgba(0, 0, 0, 0.3);
    }
    
    .mobile-nav-item {
        flex: 1;
        background: transparent;
        border: none;
        color: var(--text-muted);
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 4px;
        font-size: 0.72rem;
        font-family: var(--font-heading);
        font-weight: 500;
        cursor: pointer;
        transition: all 0.2s ease;
    }
    
    .mobile-nav-item i {
        font-size: 1.25rem;
    }
    
    .mobile-nav-item.active {
        color: var(--primary-color);
    }
    
    .mobile-nav-item.active i {
        filter: drop-shadow(0 0 4px rgba(212, 175, 55, 0.4));
    }
    
    /* Adapt card heights on mobile */
    .day-card {
        min-height: 420px;
    }
    
    .solar-day-number {
        font-size: 5rem;
    }
    
    .canchi-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 6px;
    }
}

/* ==========================================================================
   DAY SEARCH TAB STYLING
   ========================================================================== */

.search-form-grid {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.date-range-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    max-width: 600px;
}

.criteria-group {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.group-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--primary-light);
    border-left: 3px solid var(--primary-color);
    padding-left: 8px;
    margin-bottom: 4px;
}

/* Checkbox Grids */
.checkbox-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
    gap: 12px;
}

/* Premium Custom Checkbox styling */
.custom-checkbox {
    display: flex;
    align-items: center;
    position: relative;
    padding-left: 28px;
    cursor: pointer;
    font-size: 0.9rem;
    user-select: none;
    color: var(--text-main);
    transition: color 0.2s ease;
}

.custom-checkbox:hover {
    color: var(--primary-light);
}

.custom-checkbox input {
    position: absolute;
    opacity: 0;
    cursor: pointer;
    height: 0;
    width: 0;
}

.checkmark {
    position: absolute;
    top: 50%;
    left: 0;
    transform: translateY(-50%);
    height: 18px;
    width: 18px;
    background-color: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.custom-checkbox:hover input ~ .checkmark {
    border-color: var(--primary-color);
    background-color: rgba(212, 175, 55, 0.05);
}

.custom-checkbox input:checked ~ .checkmark {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    box-shadow: 0 0 8px rgba(212, 175, 55, 0.4);
}

.checkmark:after {
    content: "";
    position: absolute;
    display: none;
}

.custom-checkbox input:checked ~ .checkmark:after {
    display: block;
}

.custom-checkbox .checkmark:after {
    left: 6px;
    top: 3px;
    width: 4px;
    height: 8px;
    border: solid var(--bg-dark);
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

/* Badge-like Texts for Day Types in Checkboxes */
.badge-like-text {
    font-size: 0.82rem;
    font-weight: 500;
    padding: 1px 6px;
    border-radius: 4px;
    margin-left: 2px;
    display: inline-block;
}

.type-bao { border: 1px solid var(--color-bao); color: var(--color-bao); }
.type-nghia { border: 1px solid var(--color-nghia); color: var(--color-nghia); }
.type-che { border: 1px solid var(--color-che); color: var(--color-che); }
.type-phat { border: 1px solid var(--color-phat); color: var(--color-phat); }
.type-chuyen { border: 1px solid var(--color-chuyen); color: var(--color-chuyen); }

/* Buttons styling for Search Actions */
.search-actions-row {
    display: flex;
    gap: 15px;
    margin-top: 10px;
    max-width: 500px;
}

.btn-secondary {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    font-family: var(--font-heading);
    font-weight: 600;
    padding: 10px 14px;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-main);
    border-color: var(--text-muted);
}

/* Results section styling */
.search-results-section {
    margin-top: 32px;
    border-top: 1px dashed var(--border-color);
    padding-top: 24px;
    animation: fadeIn 0.4s ease;
}

.search-results-section.hidden {
    display: none;
}

.results-header h3 {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    color: var(--primary-light);
    margin-bottom: 16px;
}

/* Tags in Table Results */
.element-tag {
    display: inline-block;
    padding: 3px 8px;
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 700;
}

.truc-tag {
    display: inline-block;
    padding: 3px 8px;
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 600;
    background: var(--card-item-bg);
    border: 1px solid var(--border-color);
    color: var(--text-main);
}

.type-tag {
    display: inline-block;
    padding: 3px 8px;
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.tag-baonhat { background-color: var(--color-bao); color: #121214; }
.tag-nghianhat { background-color: var(--color-nghia); color: #121214; }
.tag-chenhat { background-color: var(--color-che); color: #121214; }
.tag-phatnhat { background-color: var(--color-phat); color: #fff; }
.tag-chuyennhat { background-color: var(--color-chuyen); color: #121214; }

body.light-theme .tag-baonhat { color: #fff; }
body.light-theme .tag-nghianhat { color: #fff; }
body.light-theme .tag-chenhat { color: #fff; }
body.light-theme .tag-phatnhat { color: #fff; }
body.light-theme .tag-chuyennhat { color: #fff; }

.match-status-good { color: #51cf66; }
.match-status-bad { color: #ff6b6b; }
.match-status-draining { color: #adb5bd; }
.match-status-challenging { color: #fcc419; }
.match-status-neutral { color: #ffd43b; }

body.light-theme .match-status-good { color: #2b8a3e; }
body.light-theme .match-status-bad { color: #c92a2a; }
body.light-theme .match-status-draining { color: #495057; }
body.light-theme .match-status-challenging { color: #d9480f; }
body.light-theme .match-status-neutral { color: #aa7c11; }

.btn-sm {
    font-size: 0.75rem;
    padding: 6px 10px;
    border-radius: 6px;
}

/* Light Theme overrides for checkbox & checkmark */
.light-theme .checkmark {
    background-color: rgba(0, 0, 0, 0.04);
}
.light-theme .custom-checkbox:hover input ~ .checkmark {
    background-color: rgba(212, 175, 55, 0.08);
}
.light-theme .custom-checkbox input:checked ~ .checkmark:after {
    border-color: #fff;
}
.light-theme .btn-secondary {
    border-color: var(--border-color);
    color: var(--text-muted);
}
.light-theme .btn-secondary:hover {
    background: rgba(0, 0, 0, 0.03);
    color: var(--text-main);
}
/* Removed redundant light-theme truc-tag overrides because variables resolve it automatically */

/* Mobile screen optimizations to fit Samsung A53 and similar phones beautifully on one screen */
@media (max-width: 600px) {
    .main-content {
        padding: 75px 16px 80px 16px; /* slightly more spacious content padding */
    }
    
    .day-card-container {
        margin-bottom: 12px;
    }
    
    .day-card {
        min-height: 520px; /* premium height to fill the tall A53 screen */
        border-radius: 22px;
    }
    
    .day-card-content {
        padding: 22px 20px 18px 20px;
    }
    
    .solar-header {
        margin-bottom: 8px;
    }
    
    .solar-month-year {
        font-size: 1.05rem;
    }
    
    .solar-day-body {
        margin: 8px 0;
    }
    
    .solar-day-number {
        font-size: 5.6rem; /* Restored size for bold readability */
        text-shadow: 0 2px 4px rgba(0, 0, 0, 0.8), 0 4px 20px rgba(0, 0, 0, 0.5) !important; /* double shadow to pop out from gold background */
    }
    
    .day-card:not(.saturday):not(.sunday) .solar-day-number {
        color: #ffffff !important;
        -webkit-text-fill-color: #ffffff !important;
        background: none !important; /* Remove text gradient to prevent confusion with card background */
    }
    
    .light-theme .day-card:not(.saturday):not(.sunday) .solar-day-number {
        color: #121214 !important;
        -webkit-text-fill-color: #121214 !important;
        background: none !important;
    }
    
    .light-theme .solar-day-number {
        text-shadow: 0 1px 3px rgba(255, 255, 255, 0.9) !important;
    }
    
    .solar-day-week {
        font-size: 1.45rem;
        margin-top: 2px;
    }
    
    .day-quality-badge {
        font-size: 0.88rem;
        padding: 5px 12px;
        margin-bottom: 12px;
        white-space: nowrap;
    }
    
    .lunar-quick-summary {
        padding: 10px 15px;
        margin-bottom: 12px;
        border-radius: 14px;
    }
    
    .lunar-num {
        font-size: 1.85rem;
    }
    
    .lunar-month-name {
        font-size: 0.8rem;
    }
    
    .zodiac-icon-container {
        width: 48px;
        height: 48px;
    }
    
    .zodiac-svg-img {
        width: 32px;
        height: 32px;
    }
    
    .canchi-grid {
        grid-template-columns: repeat(4, 1fr) !important;
        gap: 6px;
        margin-bottom: 12px;
    }
    
    .canchi-item {
        padding: 5px;
        border-radius: 10px;
        gap: 3px;
    }
    
    .canchi-label {
        font-size: 0.68rem;
    }
    
    .canchi-val {
        font-size: 0.82rem;
    }
    
    .day-card-advice {
        margin: 6px 0 12px 0;
        gap: 6px;
    }
    
    .day-card-advice .advice-line {
        font-size: 0.88rem;
        padding: 8px 12px;
        gap: 10px;
        border-radius: 10px;
        line-height: 1.4;
    }
    
    .day-card-advice .advice-tag-good,
    .day-card-advice .advice-tag-bad {
        font-size: 0.68rem;
        padding: 2px 6px;
    }
    
    .metadata-footer {
        padding-top: 12px;
        font-size: 0.78rem;
        gap: 8px;
    }
    
    .meta-item.highlight-truc {
        padding: 3px 8px;
        border-radius: 6px;
    }

    /* Detail View Mobile Optimizations */
    .detail-header-card {
        padding: 16px;
        gap: 12px;
        border-radius: 16px;
    }
    
    .detail-date-title h2 {
        font-size: 1.25rem;
        margin-bottom: 4px;
    }
    
    .detail-date-title h3 {
        font-size: 0.95rem;
    }
    
    .detail-tiet-mua {
        padding: 8px 12px;
        gap: 10px;
        font-size: 0.85rem;
        border-radius: 10px;
    }
    
    .detail-truc-desc {
        font-size: 0.9rem;
    }
    
    .detail-advice-container {
        gap: 8px;
        margin-top: 8px;
    }
    
    .detail-advice-container .advice-line {
        font-size: 0.88rem;
        padding: 8px 12px;
        gap: 10px;
        border-radius: 10px;
    }
    
    .hours-section-container {
        margin-top: 20px;
    }
    
    .hours-section-container .section-title {
        margin-bottom: 12px;
    }
    
    .hours-section-container .section-title h2 {
        font-size: 1.15rem;
    }
    
    .hours-grid {
        grid-template-columns: repeat(2, 1fr) !important; /* 2 columns to cut height in half! */
        gap: 8px !important;
    }
    
    .hour-card {
        padding: 10px 12px;
        border-radius: 12px;
        flex-direction: column; /* stacked layout internally to fit the 2-column width perfectly */
        align-items: flex-start;
        gap: 8px;
    }
    
    .hour-info {
        gap: 2px;
    }
    
    .hour-time {
        font-size: 0.85rem;
    }
    
    .hour-can-chi {
        font-size: 0.72rem;
    }
    
    .hour-badge {
        padding: 3px 8px;
        font-size: 0.7rem;
        gap: 4px;
        width: 100%;
        justify-content: center;
    }

    /* Month View Mobile Optimizations */
    #month-view.active {
        display: flex;
        flex-direction: column;
        gap: 10px;
    }
    
    #month-view .calendar-controls {
        padding: 8px 12px;
        margin-bottom: 0;
        border-radius: 12px;
    }
    
    #month-view .calendar-month-title {
        font-size: 1.15rem;
    }
    
    #month-view .btn-cal-change {
        font-size: 0.75rem;
        padding: 5px 10px;
        border-radius: 6px;
    }
    
    .month-grid-container {
        padding: 10px;
        overflow-x: hidden; /* Prevent horizontal scroll */
        border-radius: 16px;
    }
    
    .month-days-header {
        min-width: auto !important;
        padding-bottom: 6px;
        margin-bottom: 6px;
    }
    
    .month-day-lbl {
        font-size: 0.75rem;
    }
    
    .month-cells-grid {
        min-width: auto !important;
        grid-auto-rows: minmax(46px, 1fr) !important; /* Shrunked cell height */
        gap: 4px;
    }
    
    .calendar-cell {
        padding: 4px 6px;
        border-radius: 8px;
        min-height: 46px;
    }
    
    .solar-day-num {
        font-size: 0.9rem;
    }
    
    .star-indicator {
        font-size: 0.58rem;
    }
    
    .cell-center {
        font-size: 0.6rem;
        color: var(--tiet-khi-color) !important; /* Premium gold color for solar terms on mobile */
        font-weight: 700;
        text-transform: capitalize;
        text-align: center;
        margin-top: 2px;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
        width: 100%;
        line-height: 1;
    }
    
    .cell-bottom {
        padding-top: 2px;
        justify-content: flex-start;
    }
    
    .cell-lunar {
        font-size: 0.7rem;
    }
    
    .cell-truc {
        display: none !important; /* Hide secondary text to fit cell width/height */
    }
    
    .calendar-legend {
        padding: 12px;
        border-radius: 16px;
        margin-top: 0px;
    }
    
    .calendar-legend h3 {
        font-size: 0.85rem;
        margin-bottom: 8px;
    }
    
    .legend-items {
        gap: 6px 12px;
    }
    
    .legend-item {
        font-size: 0.72rem;
        gap: 6px;
    }
    
    .legend-item i {
        font-size: 0.65rem;
    }
}