@font-face {
    font-family: 'HarmonyOS Sans SC';
    src: url('HarmonyOS_Sans_SC_Medium.ttf') format('truetype');
    font-weight: 500;
    font-display: swap;
}

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

:root {
    --sidebar-w: 280px;
    --sidebar-collapsed-w: 60px;
    --glass-bg: rgba(255, 255, 255, 0.12);
    --glass-border: rgba(255, 255, 255, 0.18);
    --glass-hover: rgba(255, 255, 255, 0.22);
    --glass-active: rgba(255, 255, 255, 0.28);
    --text-primary: rgba(255, 255, 255, 0.95);
    --text-secondary: rgba(255, 255, 255, 0.65);
    --text-dim: rgba(255, 255, 255, 0.35);
    --accent: rgba(255, 200, 120, 0.9);
    --danger: rgba(255, 130, 130, 0.85);
    --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-spring: 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

body {
    font-family: 'HarmonyOS Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    min-height: 100vh;
    background: url('Picture.jpg') center/cover no-repeat fixed;
    display: flex;
    position: relative;
    overflow: hidden;
    user-select: none;
    -webkit-user-select: none;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.15);
    backdrop-filter: blur(3px);
    -webkit-backdrop-filter: blur(3px);
    z-index: 0;
}

/* ===== SIDEBAR ===== */
.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    width: var(--sidebar-w);
    background: rgba(0, 0, 0, 0.35);
    backdrop-filter: blur(30px);
    -webkit-backdrop-filter: blur(30px);
    border-right: 1px solid var(--glass-border);
    z-index: 10;
    display: flex;
    flex-direction: column;
    padding: 24px 20px;
    gap: 20px;
    overflow-y: auto;
    overflow-x: hidden;
    transform: translateX(0);
    transition: width var(--transition-smooth), transform var(--transition-smooth);
}

.sidebar.collapsed {
    width: var(--sidebar-collapsed-w);
    padding: 24px 12px;
}

.sidebar.hidden {
    transform: translateX(-100%);
}

.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-bottom: 16px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    position: relative;
}

.sidebar-logo {
    font-size: 22px;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: 2px;
    text-align: center;
    white-space: nowrap;
    transition: opacity var(--transition-fast);
}

.sidebar.collapsed .sidebar-logo {
    opacity: 0;
    width: 0;
}

.sidebar-collapse-btn {
    width: 28px;
    height: 28px;
    border-radius: 8px;
    border: 1px solid var(--glass-border);
    background: var(--glass-bg);
    color: var(--text-primary);
    font-size: 12px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.sidebar-collapse-btn:hover {
    background: var(--glass-hover);
}

.sidebar.collapsed .sidebar-collapse-btn {
    transform: rotate(180deg);
    position: absolute;
    right: 6px;
    top: 20px;
}

/* Collapsed state styles */
.sidebar.collapsed .view-switcher-label,
.sidebar.collapsed .view-btn-text,
.sidebar.collapsed .sidebar-section-title,
.sidebar.collapsed .sidebar-add-btn,
.sidebar.collapsed .sidebar-event-title,
.sidebar.collapsed .sidebar-event-time,
.sidebar.collapsed .sidebar-event-delete,
.sidebar.collapsed .sidebar-empty,
.sidebar.collapsed .btn-export {
    display: none;
}

.sidebar.collapsed .view-btn {
    padding: 10px;
    justify-content: center;
}

.sidebar.collapsed .view-btn-icon {
    width: auto;
    margin: 0;
}

.sidebar.collapsed .sidebar-section-header {
    justify-content: center;
}

.sidebar.collapsed .sidebar-events-list {
    max-height: none;
}

.sidebar.collapsed .sidebar-event-item {
    padding: 8px;
    min-height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.sidebar.collapsed .sidebar-event-item::before {
    content: '';
    width: 8px;
    height: 8px;
    background: var(--accent);
    border-radius: 50%;
}

.sidebar-toggle {
    position: fixed;
    left: 20px;
    top: 20px;
    width: 40px;
    height: 40px;
    border-radius: 12px;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    font-size: 18px;
    cursor: pointer;
    z-index: 20;
    display: none;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.sidebar-toggle:hover {
    background: var(--glass-hover);
}

/* View Switcher */
.view-switcher {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.view-switcher-label {
    font-size: 11px;
    color: var(--text-secondary);
    letter-spacing: 2px;
    padding-left: 8px;
    margin-bottom: 4px;
}

.view-btn {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 14px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-size: 14px;
    font-family: inherit;
    cursor: pointer;
    border-radius: 10px;
    transition: all var(--transition-fast);
    text-align: left;
    width: 100%;
}

.view-btn:hover {
    background: var(--glass-bg);
    color: var(--text-primary);
}

.view-btn.active {
    background: var(--glass-active);
    color: var(--text-primary);
    font-weight: 500;
}

.view-btn-icon {
    font-size: 18px;
    width: 28px;
    text-align: center;
    flex-shrink: 0;
}

.view-btn-text {
    white-space: nowrap;
}

/* Sidebar Events */
.sidebar-section {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.sidebar-section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.sidebar-section-title {
    font-size: 11px;
    color: var(--text-secondary);
    letter-spacing: 2px;
    padding-left: 8px;
}

.sidebar-add-btn {
    width: 28px;
    height: 28px;
    border-radius: 8px;
    border: 1px solid var(--glass-border);
    background: var(--glass-bg);
    color: var(--text-primary);
    font-size: 16px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.sidebar-add-btn:hover {
    background: var(--glass-hover);
    transform: scale(1.05);
}

.sidebar-events-list {
    display: flex;
    flex-direction: column;
    gap: 6px;
    max-height: 240px;
    overflow-y: auto;
}

.sidebar-event-item {
    padding: 10px 12px;
    border-radius: 10px;
    background: var(--glass-bg);
    border: 1px solid rgba(255, 255, 255, 0.06);
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
}

.sidebar-event-item:hover {
    background: var(--glass-hover);
    transform: translateX(4px);
}

.sidebar-event-title {
    font-size: 13px;
    color: var(--text-primary);
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.sidebar-event-time {
    font-size: 11px;
    color: var(--text-secondary);
    margin-top: 2px;
}

.sidebar-event-delete {
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    width: 22px;
    height: 22px;
    border-radius: 6px;
    border: none;
    background: rgba(255, 100, 100, 0.15);
    color: var(--danger);
    font-size: 11px;
    cursor: pointer;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.sidebar-event-item:hover .sidebar-event-delete {
    opacity: 1;
}

.sidebar-empty {
    text-align: center;
    color: var(--text-dim);
    font-size: 12px;
    padding: 20px 0;
}

/* ===== MAIN CONTENT ===== */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-w);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 24px;
    position: relative;
    z-index: 5;
    padding: 40px 20px;
    min-height: 100vh;
    transition: margin-left var(--transition-smooth);
}

body:has(.sidebar.collapsed) .main-content {
    margin-left: var(--sidebar-collapsed-w);
}

.main-content.expanded {
    margin-left: 0;
}

/* Big Date Display */
.big-date-display {
    text-align: center;
    color: var(--text-primary);
    text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.big-date-display.visible {
    opacity: 1;
    transform: translateY(0);
}

.big-day {
    font-size: 160px;
    font-weight: 300;
    line-height: 1;
    letter-spacing: -12px;
    margin-bottom: 10px;
    transition: all var(--transition-smooth);
}

.big-date-info {
    font-size: 16px;
    font-weight: 400;
    letter-spacing: 2px;
    opacity: 0.9;
    transition: all var(--transition-smooth);
}

.big-date-lunar {
    font-size: 13px;
    opacity: 0.6;
    margin-top: 4px;
    letter-spacing: 1px;
}

/* Calendar Card */
.calendar-card {
    background: var(--glass-bg);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border-radius: 24px;
    border: 1px solid var(--glass-border);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.25);
    padding: 24px;
    width: 420px;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity var(--transition-smooth), transform var(--transition-smooth), width var(--transition-smooth);
}

.calendar-card.visible {
    opacity: 1;
    transform: translateY(0);
}

/* View-specific card styles */
.calendar-card.view-year {
    width: 900px;
    max-width: calc(100vw - 360px);
    padding: 28px;
    border-radius: 28px;
    backdrop-filter: blur(28px);
    -webkit-backdrop-filter: blur(28px);
}

.calendar-card.view-week {
    width: 900px;
    max-width: calc(100vw - 360px);
    padding: 20px;
    border-radius: 20px;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

.calendar-card.view-day {
    width: 600px;
    max-width: calc(100vw - 360px);
    padding: 20px;
    border-radius: 20px;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

.calendar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.month-nav {
    display: flex;
    align-items: center;
    gap: 14px;
}

.nav-btn {
    width: 34px;
    height: 34px;
    border: none;
    background: var(--glass-bg);
    border-radius: 50%;
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    transition: all var(--transition-fast);
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.nav-btn:hover {
    background: var(--glass-hover);
    transform: scale(1.1);
}

.nav-btn:active {
    transform: scale(0.95);
}

.month-year {
    font-size: 18px;
    font-weight: 500;
    letter-spacing: 1px;
    cursor: pointer;
    transition: color var(--transition-fast);
    min-width: 80px;
    text-align: center;
}

.month-year:hover {
    color: var(--accent);
}

.header-right {
    display: flex;
    gap: 8px;
}

.header-btn {
    padding: 6px 14px;
    border: 1px solid var(--glass-border);
    background: var(--glass-bg);
    border-radius: 16px;
    color: var(--text-primary);
    font-size: 13px;
    font-family: inherit;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.header-btn:hover {
    background: var(--glass-hover);
}

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

.weekday {
    text-align: center;
    font-size: 12px;
    font-weight: 500;
    color: var(--text-secondary);
    padding: 6px 0;
}

.weekday:first-child,
.weekday:last-child {
    color: rgba(255, 150, 150, 0.7);
}

.days {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 3px;
}

.day {
    aspect-ratio: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    cursor: pointer;
    transition: opacity 0.3s ease, transform 0.3s ease, background var(--transition-fast);
    position: relative;
    color: var(--text-primary);
    font-size: 14px;
    padding: 3px;
    opacity: 0;
    transform: translateY(12px);
}

.day.visible {
    opacity: 1;
    transform: translateY(0);
}

.day:hover:not(.empty):not(.other-month) {
    background: var(--glass-bg);
    transform: scale(1.05);
    z-index: 2;
}

.day.empty {
    cursor: default;
    pointer-events: none;
}

.day.other-month {
    color: var(--text-dim);
    pointer-events: none;
}

.day.weekend {
    color: rgba(255, 180, 180, 0.85);
}

.day.weekend.other-month {
    color: rgba(255, 150, 150, 0.25);
}

.day-number {
    font-size: 15px;
    font-weight: 400;
    line-height: 1;
    transition: font-weight var(--transition-fast);
}

.day-lunar {
    font-size: 9px;
    opacity: 0.55;
    margin-top: 1px;
    line-height: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 100%;
}

.day.today {
    background: var(--glass-active);
    font-weight: 500;
    box-shadow: 0 0 0 2px rgba(255, 200, 120, 0.4);
}

.day.today .day-number {
    font-weight: 600;
}

.day.selected {
    background: rgba(255, 255, 255, 0.3);
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.3);
}

.day.selected .day-number {
    font-weight: 600;
}

.day.has-event::after {
    content: '';
    position: absolute;
    bottom: 5px;
    width: 5px;
    height: 5px;
    background: var(--accent);
    border-radius: 50%;
    box-shadow: 0 0 6px var(--accent);
}

.day.today.has-event::after {
    bottom: 5px;
}

.calendar-footer {
    margin-top: 18px;
    padding-top: 14px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    text-align: center;
}

.selected-info {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    color: var(--text-secondary);
    font-size: 13px;
}

.selected-label {
    padding: 3px 10px;
    background: var(--glass-bg);
    border-radius: 10px;
    font-size: 11px;
}

.selected-date-text {
    font-weight: 500;
    color: var(--text-primary);
}

/* Events bar below selected date */
.selected-events {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    justify-content: center;
    margin-top: 8px;
}

.selected-event-chip {
    padding: 4px 10px;
    border-radius: 12px;
    background: rgba(255, 200, 120, 0.2);
    border: 1px solid rgba(255, 200, 120, 0.3);
    font-size: 11px;
    color: var(--accent);
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
    max-width: 140px;
    overflow: hidden;
    text-overflow: ellipsis;
}

.selected-event-chip:hover {
    background: rgba(255, 200, 120, 0.3);
}

/* ===== YEAR VIEW ===== */
.year-view {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    width: 100%;
    max-width: 900px;
}

.year-month-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: 16px;
    border: 1px solid var(--glass-border);
    padding: 14px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.year-month-card:hover {
    background: var(--glass-hover);
    transform: translateY(-4px);
    box-shadow: 0 12px 28px rgba(0, 0, 0, 0.3);
}

.year-month-header {
    text-align: center;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.year-month-mini-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 1px;
}

.year-mini-day {
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 9px;
    border-radius: 4px;
    color: var(--text-dim);
    transition: all var(--transition-fast);
}

.year-mini-day.current-month {
    color: var(--text-secondary);
}

.year-mini-day.today {
    background: var(--glass-active);
    color: var(--text-primary);
    font-weight: 600;
    border-radius: 50%;
}

.year-mini-day.has-event {
    color: var(--accent);
    font-weight: 500;
}

/* ===== WEEK VIEW ===== */
.week-view {
    width: 100%;
    max-width: 900px;
}

.week-header {
    display: grid;
    grid-template-columns: 60px repeat(7, 1fr);
    gap: 4px;
    margin-bottom: 8px;
}

.week-header-time {
    text-align: center;
    font-size: 11px;
    color: var(--text-dim);
}

.week-header-day {
    text-align: center;
    padding: 10px 4px;
    border-radius: 10px;
    background: var(--glass-bg);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.week-header-day:hover {
    background: var(--glass-hover);
}

.week-header-day.today {
    background: var(--glass-active);
    box-shadow: 0 0 0 2px rgba(255, 200, 120, 0.4);
}

.week-day-name {
    font-size: 11px;
    color: var(--text-secondary);
}

.week-day-num {
    font-size: 16px;
    font-weight: 500;
    color: var(--text-primary);
}

.week-body {
    display: grid;
    grid-template-columns: 60px repeat(7, 1fr);
    gap: 4px;
    max-height: 500px;
    overflow-y: auto;
}

.week-time-label {
    font-size: 10px;
    color: var(--text-dim);
    text-align: right;
    padding: 8px 8px 0 0;
}

.week-cell {
    min-height: 32px;
    border-radius: 6px;
    border: 1px solid rgba(255, 255, 255, 0.04);
    background: rgba(255, 255, 255, 0.03);
    padding: 2px;
    position: relative;
}

.week-event {
    font-size: 10px;
    padding: 2px 6px;
    border-radius: 4px;
    background: rgba(255, 200, 120, 0.25);
    color: var(--accent);
    margin-bottom: 1px;
    cursor: pointer;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    transition: all var(--transition-fast);
}

.week-event:hover {
    background: rgba(255, 200, 120, 0.4);
}

/* ===== DAY VIEW ===== */
.day-view {
    width: 100%;
    max-width: 600px;
}

.day-view-header {
    text-align: center;
    margin-bottom: 16px;
    color: var(--text-primary);
    font-size: 18px;
    font-weight: 500;
}

.day-timeline {
    display: flex;
    flex-direction: column;
    gap: 2px;
    max-height: 520px;
    overflow-y: auto;
}

.day-hour-row {
    display: flex;
    gap: 12px;
    min-height: 40px;
    align-items: flex-start;
}

.day-hour-label {
    width: 50px;
    text-align: right;
    font-size: 11px;
    color: var(--text-dim);
    padding-top: 2px;
    flex-shrink: 0;
}

.day-hour-content {
    flex: 1;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    background: rgba(255, 255, 255, 0.02);
    padding: 4px 8px;
    min-height: 38px;
}

.day-event {
    font-size: 12px;
    padding: 4px 10px;
    border-radius: 6px;
    background: rgba(255, 200, 120, 0.25);
    color: var(--accent);
    cursor: pointer;
    margin-bottom: 2px;
    transition: all var(--transition-fast);
}

.day-event:hover {
    background: rgba(255, 200, 120, 0.4);
}

/* ===== MODAL ===== */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-smooth);
}

.modal-overlay.show {
    opacity: 1;
    pointer-events: all;
}

.modal {
    background: rgba(30, 30, 40, 0.92);
    backdrop-filter: blur(30px);
    -webkit-backdrop-filter: blur(30px);
    border-radius: 20px;
    border: 1px solid var(--glass-border);
    padding: 28px;
    width: 420px;
    max-width: 90vw;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    transform: translateY(30px) scale(0.96);
    opacity: 0;
    transition: transform var(--transition-spring), opacity var(--transition-spring);
}

.modal-overlay.show .modal {
    transform: translateY(0) scale(1);
    opacity: 1;
}

.modal-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 20px;
    text-align: center;
}

.form-group {
    margin-bottom: 16px;
}

.form-label {
    display: block;
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 6px;
    letter-spacing: 1px;
}

.form-input {
    width: 100%;
    padding: 10px 14px;
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-primary);
    font-size: 14px;
    font-family: inherit;
    outline: none;
    transition: all var(--transition-fast);
}

.form-input:focus {
    border-color: var(--accent);
    background: rgba(255, 255, 255, 0.1);
    box-shadow: 0 0 0 3px rgba(255, 200, 120, 0.1);
}

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

textarea.form-input {
    resize: vertical;
    min-height: 80px;
}

.form-row {
    display: flex;
    gap: 12px;
}

.form-row .form-group {
    flex: 1;
}

.form-actions {
    display: flex;
    gap: 10px;
    margin-top: 24px;
}

.btn {
    flex: 1;
    padding: 10px 20px;
    border-radius: 10px;
    border: none;
    font-size: 14px;
    font-family: inherit;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-primary {
    background: var(--accent);
    color: #1a1a2e;
}

.btn-primary:hover {
    filter: brightness(1.1);
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(255, 200, 120, 0.3);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    border: 1px solid var(--glass-border);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.15);
}

.btn-danger {
    background: rgba(255, 100, 100, 0.2);
    color: var(--danger);
    border: 1px solid rgba(255, 100, 100, 0.3);
}

.btn-danger:hover {
    background: rgba(255, 100, 100, 0.3);
}

.btn-export {
    background: rgba(100, 200, 150, 0.2);
    color: rgba(100, 220, 160, 0.9);
    border: 1px solid rgba(100, 200, 150, 0.3);
    font-size: 12px;
    padding: 6px 12px;
    border-radius: 8px;
}

.btn-export:hover {
    background: rgba(100, 200, 150, 0.3);
}

/* Toast notification */
.toast {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 12px 24px;
    border-radius: 12px;
    background: rgba(30, 30, 40, 0.92);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    font-size: 14px;
    z-index: 200;
    transform: translateX(120%);
    opacity: 0;
    transition: transform var(--transition-spring), opacity var(--transition-smooth);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

.toast.show {
    transform: translateX(0);
    opacity: 1;
}

.toast.success {
    border-color: rgba(100, 220, 160, 0.5);
}

.toast.error {
    border-color: rgba(255, 130, 130, 0.5);
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 4px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.15);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.25);
}

/* Responsive */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        width: 280px;
    }

    .sidebar.collapsed {
        width: 280px;
        padding: 24px 20px;
    }

    .sidebar.mobile-open {
        transform: translateX(0);
        box-shadow: 4px 0 30px rgba(0, 0, 0, 0.5);
    }

    /* Reset collapsed styles on mobile */
    .sidebar.collapsed .sidebar-logo,
    .sidebar.collapsed .view-switcher-label,
    .sidebar.collapsed .view-btn-text,
    .sidebar.collapsed .sidebar-section-title,
    .sidebar.collapsed .sidebar-add-btn,
    .sidebar.collapsed .sidebar-event-title,
    .sidebar.collapsed .sidebar-event-time,
    .sidebar.collapsed .sidebar-empty,
    .sidebar.collapsed .btn-export {
        display: block;
    }

    .sidebar.collapsed .sidebar-event-delete {
        display: none;
    }

    .sidebar.collapsed .view-btn {
        padding: 10px 14px;
        justify-content: flex-start;
    }

    .sidebar.collapsed .sidebar-event-item {
        padding: 10px 12px;
        justify-content: flex-start;
    }

    .sidebar.collapsed .sidebar-event-item::before {
        display: none;
    }

    .sidebar-toggle {
        display: flex;
    }

    .sidebar-collapse-btn {
        display: none;
    }

    .main-content {
        margin-left: 0;
        padding: 80px 12px 40px;
    }

    body:has(.sidebar.collapsed) .main-content {
        margin-left: 0;
    }

    .big-day {
        font-size: 100px;
        letter-spacing: -6px;
    }

    .big-date-info {
        font-size: 14px;
    }

    .calendar-card {
        width: calc(100vw - 24px);
        padding: 16px;
        border-radius: 18px;
    }

    .calendar-card.view-year,
    .calendar-card.view-week {
        width: calc(100vw - 24px);
        padding: 14px;
        border-radius: 16px;
    }

    .calendar-card.view-day {
        width: calc(100vw - 24px);
        padding: 14px;
        border-radius: 16px;
    }

    .day {
        border-radius: 8px;
    }

    .day-number {
        font-size: 13px;
    }

    .day-lunar {
        font-size: 7px;
    }

    .year-view {
        grid-template-columns: repeat(3, 1fr);
        gap: 10px;
    }

    .week-body {
        max-height: 400px;
    }
}

@media (max-width: 480px) {
    .year-view {
        grid-template-columns: repeat(2, 1fr);
        gap: 8px;
    }

    .big-day {
        font-size: 80px;
        letter-spacing: -4px;
    }
}