/* Reset và biến CSS */
:root {
    --primary: #6c5ce7;
    --primary-light: #a29bfe;
    --primary-dark: #5b4fcc;
    --secondary: #00cec9;
    --secondary-light: #81ecec;
    --secondary-dark: #00b894;
    --accent: #fd79a8;
    --accent-light: #ffafcc;
    --accent-dark: #e84393;
    
    --success: #00b894;
    --warning: #fdcb6e;
    --info: #0984e3;
    --danger: #d63031;
    
    --dark: #2d3436;
    --dark-light: #636e72;
    --light: #f5f6fa;
    --gray: #dfe6e9;
    --gray-light: #f1f2f6;
    --gray-dark: #b2bec3;
    
    --solar-color: #e17055;
    --lunar-color: #0984e3;
    --today-color: #fdcb6e;
    --selected-color: #00b894;
    --weekend-color: #6c5ce7;
    --holiday-color: #d63031;
    
    --card-bg: #ffffff;
    --card-shadow: 0 10px 30px rgba(108, 92, 231, 0.1);
    --card-shadow-hover: 0 15px 35px rgba(108, 92, 231, 0.15);
    --radius: 16px;
    --radius-sm: 10px;
    
    --font-primary: 'Inter', 'Segoe UI', sans-serif;
    --font-heading: 'Montserrat', 'Inter', sans-serif;
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --gradient-primary: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    --gradient-accent: linear-gradient(135deg, var(--accent) 0%, var(--primary-light) 100%);
}

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

body {
    font-family: var(--font-primary);
    background: linear-gradient(135deg, #f5f7fa 0%, #e4e8f0 100%);
    color: var(--dark);
    line-height: 1.6;
    min-height: 100vh;
    padding: 20px;
    background-attachment: fixed;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    background: white;
    border-radius: var(--radius);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.08);
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

/* Header */
.header {
    background: var(--gradient-primary);
    padding: 25px 40px;
    color: white;
    position: relative;
    overflow: hidden;
}

.header::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 300px;
    height: 300px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    transform: translate(30%, -30%);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
    position: relative;
    z-index: 1;
}

.logo {
    display: flex;
    align-items: center;
    gap: 15px;
}

.logo-icon {
    font-size: 2.5rem;
    color: white;
    background: rgba(255, 255, 255, 0.2);
    padding: 15px;
    border-radius: 15px;
    backdrop-filter: blur(10px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
}

.logo-text h1 {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 700;
    color: white;
    margin-bottom: 5px;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.tagline {
    color: rgba(255, 255, 255, 0.9);
    font-size: 0.95rem;
    font-weight: 400;
}

.header-actions {
    display: flex;
    gap: 15px;
    align-items: center;
}

.home-button {
    display: flex;
    align-items: center;
    gap: 10px;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    color: white;
    text-decoration: none;
    padding: 12px 24px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.95rem;
    transition: var(--transition);
    border: 1px solid rgba(255, 255, 255, 0.3);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.home-button:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
}

.theme-toggle {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    font-size: 1.2rem;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.theme-toggle:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: rotate(30deg);
}

/* Main Content */
.main-content {
    padding: 30px;
    display: flex;
    flex-direction: column;
    gap: 30px;
}

/* Date Info Section */
.date-info-section {
    width: 100%;
}

.info-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--card-shadow);
    overflow: hidden;
    border: 1px solid rgba(108, 92, 231, 0.1);
}

.info-card-header {
    background: linear-gradient(90deg, rgba(108, 92, 231, 0.05) 0%, rgba(0, 206, 201, 0.05) 100%);
    padding: 25px 30px;
    border-bottom: 1px solid rgba(108, 92, 231, 0.1);
}

.date-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--gradient-primary);
    padding: 8px 16px;
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 15px;
    color: white;
    box-shadow: 0 4px 10px rgba(108, 92, 231, 0.2);
}

.current-date-display {
    font-family: var(--font-heading);
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--dark);
}

.date-comparison {
    display: flex;
    align-items: center;
    padding: 40px 30px;
    gap: 40px;
    flex-wrap: wrap;
    justify-content: center;
}

.date-column {
    flex: 1;
    min-width: 300px;
    max-width: 400px;
    text-align: center;
    padding: 40px 30px;
    border-radius: var(--radius);
    background: white;
    box-shadow: var(--card-shadow);
    position: relative;
    overflow: hidden;
    transition: var(--transition);
    border: 2px solid transparent;
}

.date-column:hover {
    transform: translateY(-5px);
    box-shadow: var(--card-shadow-hover);
}

.solar-date {
    border-color: rgba(225, 112, 85, 0.2);
}

.lunar-date {
    border-color: rgba(9, 132, 227, 0.2);
}

.date-column::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 5px;
}

.solar-date::before {
    background: linear-gradient(90deg, var(--solar-color) 0%, #fab1a0 100%);
}

.lunar-date::before {
    background: linear-gradient(90deg, var(--lunar-color) 0%, #74b9ff 100%);
}

.date-icon {
    font-size: 3rem;
    margin-bottom: 20px;
    background: linear-gradient(135deg, var(--solar-color) 0%, #fab1a0 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.lunar-date .date-icon {
    background: linear-gradient(135deg, var(--lunar-color) 0%, #74b9ff 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.date-column h3 {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    margin-bottom: 15px;
    color: var(--dark);
    font-weight: 600;
}

.date-value {
    font-family: var(--font-heading);
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--dark);
}

.solar-date .date-value {
    background: linear-gradient(135deg, var(--solar-color) 0%, #fab1a0 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.lunar-date .date-value {
    background: linear-gradient(135deg, var(--lunar-color) 0%, #74b9ff 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.day-of-week {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--dark-light);
    margin-bottom: 15px;
    text-transform: uppercase;
}

.date-label {
    font-size: 0.85rem;
    color: var(--gray-dark);
    font-style: italic;
    margin-top: 10px;
}

.vs-separator {
    display: flex;
    align-items: center;
    justify-content: center;
}

.vs-circle {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
    font-size: 0.9rem;
    box-shadow: 0 4px 15px rgba(108, 92, 231, 0.3);
}

/* Main Grid Layout */
.main-grid {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 30px;
    width: 100%;
}

@media (max-width: 1200px) {
    .main-grid {
        grid-template-columns: 1fr;
    }
}

/* Control Panel */
.control-panel {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.panel-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--card-shadow);
    overflow: hidden;
    border: 1px solid rgba(108, 92, 231, 0.1);
}

.panel-header {
    background: linear-gradient(90deg, rgba(108, 92, 231, 0.05) 0%, rgba(0, 206, 201, 0.05) 100%);
    padding: 20px 25px;
    border-bottom: 1px solid rgba(108, 92, 231, 0.1);
    display: flex;
    align-items: center;
    gap: 15px;
}

.panel-header i {
    font-size: 1.3rem;
    color: var(--primary);
}

.panel-header h2 {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    color: var(--dark);
    font-weight: 600;
}

.panel-body {
    padding: 25px;
}

.control-group {
    display: flex;
    flex-direction: column;
    margin-bottom: 20px;
}

.control-group:last-child {
    margin-bottom: 0;
}

.control-group label {
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--dark);
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
}

.control-input {
    padding: 14px 15px;
    border: 2px solid var(--gray);
    border-radius: var(--radius-sm);
    font-family: var(--font-primary);
    font-size: 1rem;
    transition: var(--transition);
    background: white;
    color: var(--dark);
}

.control-input:focus {
    border-color: var(--primary);
    outline: none;
    box-shadow: 0 0 0 3px rgba(108, 92, 231, 0.1);
}

.action-buttons {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-top: 25px;
}

.btn {
    padding: 14px 24px;
    border: none;
    border-radius: var(--radius-sm);
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 15px rgba(108, 92, 231, 0.2);
}

.btn-secondary {
    background: white;
    color: var(--dark);
    border: 2px solid var(--gray);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--secondary-dark) 100%);
}

.btn-secondary:hover {
    background: var(--light);
    border-color: var(--primary);
    color: var(--primary);
}

.nav-buttons {
    display: flex;
    gap: 10px;
}

.nav-buttons .btn {
    flex: 1;
}

/* Details Card */
.details-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--card-shadow);
    overflow: hidden;
    border: 1px solid rgba(108, 92, 231, 0.1);
}

.details-header {
    background: linear-gradient(90deg, rgba(108, 92, 231, 0.05) 0%, rgba(0, 206, 201, 0.05) 100%);
    padding: 20px 25px;
    display: flex;
    align-items: center;
    gap: 15px;
    border-bottom: 1px solid rgba(108, 92, 231, 0.1);
}

.details-header i {
    font-size: 1.3rem;
    color: var(--primary);
}

.details-header h2 {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--dark);
}

.details-content {
    padding: 25px;
}

.lunar-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
}

.lunar-item {
    background: white;
    padding: 18px;
    border-radius: var(--radius-sm);
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.05);
    display: flex;
    gap: 15px;
    align-items: center;
    transition: var(--transition);
    border: 1px solid rgba(108, 92, 231, 0.1);
}

.lunar-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    border-color: var(--primary-light);
}

.lunar-icon {
    font-size: 1.4rem;
    padding: 12px;
    border-radius: 10px;
    background: linear-gradient(135deg, rgba(108, 92, 231, 0.1) 0%, rgba(0, 206, 201, 0.1) 100%);
    color: var(--primary);
    flex-shrink: 0;
}

.lunar-info h4 {
    font-size: 0.85rem;
    color: var(--dark-light);
    margin-bottom: 5px;
    font-weight: 500;
}

.lunar-info p {
    font-size: 1.1rem;
    color: var(--dark);
    font-weight: 600;
}

/* Calendar Section */
.calendar-section {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.calendar-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--card-shadow);
    overflow: hidden;
    border: 1px solid rgba(108, 92, 231, 0.1);
}

.calendar-header {
    padding: 25px 30px;
    background: linear-gradient(90deg, rgba(108, 92, 231, 0.05) 0%, rgba(0, 206, 201, 0.05) 100%);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
    border-bottom: 1px solid rgba(108, 92, 231, 0.1);
}

.calendar-title {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.calendar-title h2 {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    color: var(--dark);
    display: flex;
    align-items: center;
    gap: 10px;
}

.month-year-display {
    display: flex;
    flex-direction: column;
    gap: 3px;
}

.month-year-display span:first-child {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--primary);
    font-family: var(--font-heading);
}

.lunar-month {
    font-size: 0.9rem;
    color: var(--dark-light);
    font-style: italic;
}

.calendar-nav {
    display: flex;
    gap: 8px;
}

.btn-icon {
    width: 44px;
    height: 44px;
    border: none;
    border-radius: var(--radius-sm);
    background: white;
    color: var(--dark);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    box-shadow: 0 3px 8px rgba(0, 0, 0, 0.08);
    font-size: 1.1rem;
    border: 1px solid rgba(108, 92, 231, 0.1);
}

.btn-icon:hover {
    background: var(--gradient-primary);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 6px 15px rgba(108, 92, 231, 0.2);
}

.calendar-container {
    padding: 25px;
}

.weekdays {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 5px;
    margin-bottom: 10px;
}

.weekday {
    text-align: center;
    padding: 15px 5px;
    font-weight: 600;
    color: var(--dark);
    background: rgba(108, 92, 231, 0.05);
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-family: var(--font-heading);
}

.weekday.sun, .weekday.sat {
    color: var(--weekend-color);
    background: rgba(108, 92, 231, 0.1);
}

.calendar-days {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 5px;
}

.day {
    aspect-ratio: 1;
    padding: 10px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    background: white;
    border: 2px solid transparent;
    overflow: hidden;
}

.day:hover {
    background: rgba(108, 92, 231, 0.05);
    border-color: rgba(108, 92, 231, 0.3);
    z-index: 1;
    transform: scale(1.05);
}

.day.today {
    background: rgba(253, 203, 110, 0.15);
    border-color: var(--today-color);
    font-weight: 700;
}

.day.selected {
    background: rgba(0, 184, 148, 0.15);
    border-color: var(--selected-color);
    font-weight: 700;
}

.day.weekend {
    background: rgba(108, 92, 231, 0.05);
}

.day.holiday {
    background: rgba(214, 48, 49, 0.05);
}

.day.holiday::before {
    content: '🎉';
    position: absolute;
    top: 3px;
    right: 3px;
    font-size: 0.7rem;
}

.day.other-month {
    opacity: 0.4;
    background: rgba(189, 195, 199, 0.1);
}

.solar-day {
    font-size: 1.2rem;
    font-weight: 600;
    text-align: center;
    color: var(--dark);
    font-family: var(--font-heading);
}

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

.day.holiday .solar-day {
    color: var(--holiday-color);
}

.lunar-day {
    font-size: 0.8rem;
    color: var(--dark-light);
    text-align: center;
    margin-top: 5px;
    font-weight: 500;
}

.calendar-footer {
    padding: 20px 30px;
    border-top: 1px solid rgba(108, 92, 231, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
    background: rgba(108, 92, 231, 0.02);
}

.legend {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    color: var(--dark);
    font-weight: 500;
}

.legend-color {
    width: 16px;
    height: 16px;
    border-radius: 4px;
    border: 1px solid rgba(0, 0, 0, 0.1);
}

.legend-color.today {
    background: rgba(253, 203, 110, 0.3);
    border-color: var(--today-color);
}

.legend-color.selected {
    background: rgba(0, 184, 148, 0.3);
    border-color: var(--selected-color);
}

.legend-color.weekend {
    background: rgba(108, 92, 231, 0.3);
    border-color: var(--weekend-color);
}

.legend-color.holiday {
    background: rgba(214, 48, 49, 0.3);
    border-color: var(--holiday-color);
}

.quick-actions {
    display: flex;
    gap: 10px;
}

.btn-text {
    background: white;
    border: 2px solid rgba(108, 92, 231, 0.2);
    color: var(--dark);
    font-weight: 600;
    cursor: pointer;
    padding: 10px 18px;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    font-family: var(--font-heading);
}

.btn-text:hover {
    background: var(--gradient-primary);
    color: white;
    border-color: transparent;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(108, 92, 231, 0.2);
}

/* Additional Info Card */
.additional-info-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--card-shadow);
    overflow: hidden;
    border: 1px solid rgba(108, 92, 231, 0.1);
}

.additional-info {
    padding: 25px;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.info-item {
    background: white;
    padding: 22px;
    border-radius: var(--radius-sm);
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.05);
    display: flex;
    gap: 18px;
    align-items: flex-start;
    transition: var(--transition);
    border-left: 4px solid;
    border: 1px solid rgba(108, 92, 231, 0.1);
}

.info-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
}

.auspicious {
    border-left-color: var(--success);
}

.inauspicious {
    border-left-color: var(--danger);
}

.zodiac {
    border-left-color: var(--warning);
}

.activities {
    border-left-color: var(--info);
}

.info-icon {
    font-size: 1.5rem;
    padding: 12px;
    border-radius: 10px;
    background: linear-gradient(135deg, rgba(0, 184, 148, 0.1) 0%, rgba(0, 184, 148, 0.05) 100%);
    color: var(--success);
    flex-shrink: 0;
}

.inauspicious .info-icon {
    background: linear-gradient(135deg, rgba(214, 48, 49, 0.1) 0%, rgba(214, 48, 49, 0.05) 100%);
    color: var(--danger);
}

.zodiac .info-icon {
    background: linear-gradient(135deg, rgba(253, 203, 110, 0.1) 0%, rgba(253, 203, 110, 0.05) 100%);
    color: var(--warning);
}

.activities .info-icon {
    background: linear-gradient(135deg, rgba(9, 132, 227, 0.1) 0%, rgba(9, 132, 227, 0.05) 100%);
    color: var(--info);
}

.info-content h4 {
    font-family: var(--font-heading);
    font-size: 1rem;
    margin-bottom: 10px;
    color: var(--dark);
    font-weight: 600;
}

.info-content p {
    color: var(--dark-light);
    line-height: 1.5;
    font-size: 0.95rem;
}

/* Footer */
.footer {
    background: linear-gradient(135deg, var(--dark) 0%, #2d3436 100%);
    padding: 30px 40px;
    color: white;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    align-items: center;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.4rem;
    font-weight: 700;
    font-family: var(--font-heading);
}

.footer-logo i {
    color: var(--accent);
    font-size: 1.8rem;
}

.footer-info p {
    color: rgba(255, 255, 255, 0.85);
    line-height: 1.5;
    margin-bottom: 10px;
    font-size: 0.9rem;
}

.disclaimer {
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.6);
    font-style: italic;
    margin-top: 10px;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-link {
    color: rgba(255, 255, 255, 0.85);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 10px;
    transition: var(--transition);
    font-size: 0.9rem;
}

.footer-link:hover {
    color: var(--accent-light);
    transform: translateX(5px);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: 20px;
    backdrop-filter: blur(5px);
}

.modal.active {
    display: flex;
    animation: modalFadeIn 0.3s ease;
}

@keyframes modalFadeIn {
    from {
        opacity: 0;
        backdrop-filter: blur(0);
    }
    to {
        opacity: 1;
        backdrop-filter: blur(5px);
    }
}

.modal-content {
    background: white;
    border-radius: var(--radius);
    width: 100%;
    max-width: 500px;
    max-height: 90vh;
    overflow: auto;
    animation: modalSlideIn 0.3s ease;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-header {
    padding: 25px 30px;
    border-bottom: 1px solid rgba(108, 92, 231, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: linear-gradient(90deg, rgba(108, 92, 231, 0.05) 0%, rgba(0, 206, 201, 0.05) 100%);
}

.modal-header h3 {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--dark);
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.8rem;
    cursor: pointer;
    color: var(--gray-dark);
    transition: var(--transition);
    line-height: 1;
    padding: 0;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

.modal-close:hover {
    background: rgba(108, 92, 231, 0.1);
    color: var(--danger);
}

.modal-body {
    padding: 30px;
}

.modal-body p {
    margin-bottom: 20px;
    line-height: 1.6;
    color: var(--dark);
}

.modal-body ul {
    padding-left: 20px;
    margin-bottom: 20px;
}

.modal-body li {
    margin-bottom: 10px;
    color: var(--dark);
    line-height: 1.5;
}

.legend-demo {
    display: inline-block;
    width: 12px;
    height: 12px;
    border-radius: 3px;
    margin-right: 8px;
    vertical-align: middle;
}

.today-demo {
    background: var(--today-color);
}

.selected-demo {
    background: var(--selected-color);
}

.weekend-demo {
    background: var(--weekend-color);
}

.holiday-demo {
    background: var(--holiday-color);
}

/* Responsive Design */
@media (max-width: 1200px) {
    .main-grid {
        grid-template-columns: 1fr;
    }
    
    .date-column {
        min-width: 100%;
    }
}

@media (max-width: 992px) {
    .header-content {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .header-actions {
        width: 100%;
        justify-content: space-between;
    }
    
    .calendar-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 20px;
    }
    
    .calendar-nav {
        width: 100%;
        justify-content: center;
    }
    
    .calendar-footer {
        flex-direction: column;
        align-items: flex-start;
        gap: 20px;
    }
    
    .legend {
        justify-content: center;
        width: 100%;
    }
    
    .quick-actions {
        width: 100%;
        justify-content: center;
    }
    
    .lunar-grid {
        grid-template-columns: 1fr;
    }
    
    .info-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    body {
        padding: 10px;
    }
    
    .container {
        border-radius: 12px;
    }
    
    .header, .main-content, .footer {
        padding: 20px;
    }
    
    .date-value {
        font-size: 1.8rem;
    }
    
    .weekday, .day {
        padding: 10px 2px;
    }
    
    .solar-day {
        font-size: 1rem;
    }
    
    .lunar-day {
        font-size: 0.7rem;
    }
    
    .btn-text {
        padding: 8px 14px;
        font-size: 0.85rem;
    }
    
    .date-comparison {
        flex-direction: column;
        gap: 20px;
    }
    
    .vs-separator {
        display: none;
    }
}

@media (max-width: 480px) {
    .logo {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .logo-icon {
        font-size: 2rem;
        padding: 12px;
    }
    
    .logo-text h1 {
        font-size: 1.6rem;
    }
    
    .calendar-title h2 {
        font-size: 1.2rem;
    }
    
    .month-year-display span:first-child {
        font-size: 1.3rem;
    }
    
    .btn-icon {
        width: 36px;
        height: 36px;
    }
    
    .control-input {
        padding: 12px;
    }
    
    .btn {
        padding: 12px;
        font-size: 0.9rem;
    }
    
    .modal-body {
        padding: 20px;
    }
}

/* Print Styles */
@media print {
    .header-actions,
    .calendar-nav,
    .quick-actions,
    .theme-toggle,
    .footer-links,
    .btn,
    .btn-icon,
    .btn-text {
        display: none !important;
    }
    
    .container {
        box-shadow: none;
        max-width: 100%;
    }
    
    .card, .panel-card, .calendar-card, .details-card {
        box-shadow: none;
        border: 1px solid #ddd;
    }
    
    body {
        background: white;
        padding: 0;
    }
}