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

html {
    height: 100%;
    background: #e4e4e4;
}

html[data-theme="dark"] {
    background: #2a2a2a;
}

:root {
    --bg-primary: #e4e4e4;
    --bg-secondary: #ececec;
    --text-primary: #252525;
    --text-secondary: #4a4a4a;
    --text-muted: #777;
    --border-color: #c0c0c0;
    --border-light: #d0d0d0;
    --segment-weekend: #dcdcdc;
    --segment-hover: #cce0f0;
    --range-selected: rgba(160, 200, 235, 0.85);
    --range-selected-weekend: rgba(130, 175, 210, 0.9);
    --modal-bg: #ececec;
    --input-bg: #f5f5f5;
    --input-border: #bbb;
    --button-secondary-bg: #d5d5d5;
    --tooltip-bg: #333;
    --tooltip-text: #fff;
}

[data-theme="dark"] {
    --bg-primary: #2a2a2a;
    --bg-secondary: #363636;
    --text-primary: #d8d8d8;
    --text-secondary: #a0a0a0;
    --text-muted: #707070;
    --border-color: #4a4a4a;
    --border-light: #404040;
    --segment-weekend: #303030;
    --segment-hover: #4a5a6a;
    --range-selected: rgba(70, 110, 150, 0.7);
    --range-selected-weekend: rgba(60, 95, 130, 0.8);
    --modal-bg: #363636;
    --input-bg: #444;
    --input-border: #5a5a5a;
    --button-secondary-bg: #444;
    --tooltip-bg: #555;
    --tooltip-text: #fff;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* Header */
.app-header {
    position: sticky;
    top: 8px;
    z-index: 100;
    background: var(--bg-secondary);
    border-radius: 12px;
    width: 100%;
    max-width: 900px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 20px;
}

.app-header h1 {
    font-size: 18px;
    font-weight: 500;
    color: var(--text-primary);
}

/* Theme toggle */
.theme-toggle {
    background: none;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 6px 8px;
    cursor: pointer;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color 0.15s ease, border-color 0.15s ease;
}

.theme-toggle:hover {
    color: var(--text-primary);
    border-color: var(--text-muted);
}

.theme-toggle .sun-icon {
    display: none;
}

.theme-toggle .moon-icon {
    display: block;
}

[data-theme="dark"] .theme-toggle .sun-icon {
    display: block;
}

[data-theme="dark"] .theme-toggle .moon-icon {
    display: none;
}

#auth-section {
    display: flex;
    align-items: center;
}

#user-info {
    display: flex;
    align-items: center;
    gap: 10px;
}

#user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
}

#user-name {
    font-size: 14px;
    color: var(--text-secondary);
}

.auth-btn {
    padding: 8px 16px;
    border: none;
    border-radius: 4px;
    font-size: 13px;
    cursor: pointer;
    background: #1976d2;
    color: #fff;
    transition: background 0.15s ease;
}

.auth-btn:hover {
    background: #1565c0;
}

.auth-btn.logout {
    background: var(--button-secondary-bg);
    color: var(--text-secondary);
}

.auth-btn.logout:hover {
    background: var(--border-color);
}

.container {
    width: 100%;
    max-width: 900px;
    padding: 20px;
    overflow: visible;
}

.calendar-wrapper {
    width: 100%;
}

#calendar {
    width: 100%;
    display: block;
    transition: all 0.3s ease;
    user-select: none;
    touch-action: none;
}

#calendar.zoomed {
    cursor: grab;
}

/* Day segments */
.day-segment {
    fill: var(--bg-secondary);
    stroke: var(--border-color);
    stroke-width: 0.05;
    cursor: pointer;
    transition: fill 0.15s ease, transform 0.15s ease, filter 0.15s ease;
}


.day-segment.weekend {
    fill: var(--segment-weekend);
}

.day-segment:hover,
.day-segment.hovered {
    filter: brightness(1.15);
}

.day-segment.range-selected {
    fill: var(--range-selected);
}

.day-segment.weekend.range-selected {
    fill: var(--range-selected-weekend);
}

.day-segment.has-event:hover,
.day-segment.has-event.hovered,
.day-segment.has-event.linked-hover {
    filter: brightness(1.15);
}

/* Event subsegments for multi-event days */
.event-subsegment {
    stroke: var(--border-color);
    stroke-width: 0.05;
    cursor: pointer;
    transition: filter 0.15s ease;
}

.event-subsegment:hover,
.event-subsegment.linked-hover {
    filter: brightness(1.15);
}

/* Month ticks */
.month-tick {
    stroke: rgba(0, 0, 0, 0.5);
    stroke-width: 0.4;
    stroke-linecap: round;
}

/* Month labels */
.month-label {
    font-size: 10px;
    font-weight: 500;
    fill: var(--text-secondary);
    letter-spacing: 0.3px;
    transition: font-size 0.1s ease;
}

/* Clock hand */
.clock-hand {
    fill: rgba(229, 57, 53, 0.6);
    stroke: none;
}

/* Date/time text in center */
.center-date {
    font-size: 8px;
    font-weight: 500;
    fill: var(--text-primary);
}

.center-time {
    font-size: 8px;
    font-weight: 300;
    fill: var(--text-secondary);
}

/* Day number labels */
.day-number {
    font-size: 1.5px;
    font-weight: 500;
    fill: var(--text-muted);
    pointer-events: none;
    transition: font-size 0.1s ease;
}

#calendar.zoomed .day-number {
    fill: var(--text-secondary);
}

/* Day of week labels */
.day-of-week {
    font-size: 1.5px;
    font-weight: 500;
    fill: var(--text-muted);
    pointer-events: none;
    transition: font-size 0.1s ease;
}

#calendar.zoomed .day-of-week {
    fill: var(--text-secondary);
}

/* Annotation markers */
.annotation-line {
    stroke: var(--text-muted);
    stroke-width: 0.15;
    transition: stroke-width 0.15s ease, opacity 0.3s ease;
    display: none; /* Hidden for now - to be redesigned later */
}

.annotation-text {
    font-size: 7px;
    fill: #ff6360;
    font-weight: 400;
    transition: font-size 0.1s ease, filter 0.15s ease, opacity 0.3s ease;
    cursor: grab;
}

.annotation-text:hover,
.annotation-text.linked-hover {
    filter: brightness(1.3);
    font-size: 8px;
}

.annotation-line.linked-hover {
    stroke-width: 0.25;
}

/* Tooltip */
.tooltip {
    display: none;
    position: fixed;
    background: var(--tooltip-bg);
    color: var(--tooltip-text);
    padding: 6px 10px;
    border-radius: 4px;
    font-size: 13px;
    pointer-events: none;
    z-index: 100;
    max-width: 250px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.4);
    align-items: center;
    justify-content: center;
    z-index: 200;
}

.modal-content {
    background: var(--modal-bg);
    padding: 24px;
    border-radius: 8px;
    width: 90%;
    max-width: 400px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.modal-content h3 {
    margin-bottom: 16px;
    font-weight: 500;
    color: var(--text-primary);
}

/* Date input section in modal */
.modal-date-section {
    display: flex;
    gap: 16px;
    margin-bottom: 16px;
}

.date-input-group {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.date-input-group label {
    font-size: 12px;
    font-weight: 500;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.date-input-group input[type="date"] {
    padding: 8px 10px;
    border: 1px solid var(--input-border);
    border-radius: 4px;
    font-size: 14px;
    font-family: inherit;
    background: var(--input-bg);
    color: var(--text-primary);
    cursor: pointer;
}

.date-input-group input[type="date"]:focus {
    outline: none;
    border-color: #1976d2;
}

/* Dark mode date input styling */
[data-theme="dark"] .date-input-group input[type="date"]::-webkit-calendar-picker-indicator {
    filter: invert(0.8);
}

#existing-annotations {
    margin-bottom: 12px;
}

#existing-annotations ul {
    list-style: none;
    margin-top: 8px;
}

#existing-annotations li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 6px 0;
    border-bottom: 1px solid var(--border-light);
    color: var(--text-secondary);
}

#also-on-this-day {
    margin-top: 12px;
}

.also-on-day-label {
    font-size: 12px;
    color: var(--text-muted);
    margin: 0 0 8px 0;
}

.also-on-day-btn {
    display: block;
    width: 100%;
    padding: 8px 12px;
    margin-bottom: 6px;
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: 4px;
    color: var(--text-secondary);
    font-size: 13px;
    font-family: inherit;
    text-align: left;
    cursor: pointer;
    transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.also-on-day-btn:hover {
    background: var(--hover-bg);
    border-color: var(--text-muted);
    color: var(--text-primary);
}

.also-on-day-btn:last-child {
    margin-bottom: 0;
}

.delete-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 18px;
    cursor: pointer;
    padding: 0 6px;
}

.delete-btn:hover {
    color: #e53935;
}

#annotation-input {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--input-border);
    border-radius: 4px;
    font-size: 14px;
    font-family: inherit;
    resize: vertical;
    min-height: 60px;
    background: var(--input-bg);
    color: var(--text-primary);
}

#annotation-input:focus {
    outline: none;
    border-color: #1976d2;
}

.color-picker {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 12px;
}

.color-options {
    display: flex;
    gap: 6px;
}

.color-option {
    width: 24px;
    height: 24px;
    border: 2px solid var(--input-border);
    border-radius: 4px;
    cursor: pointer;
    transition: border-color 0.15s ease, transform 0.1s ease;
}

.color-option:hover {
    transform: scale(1.1);
}

.color-option.selected {
    border-color: var(--text-primary);
}

.visibility-toggle {
    display: flex;
    gap: 6px;
    margin-top: 12px;
}

.visibility-btn {
    padding: 6px 12px;
    border: 1px solid var(--input-border);
    border-radius: 4px;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 13px;
    transition: all 0.15s ease;
}

.visibility-btn:hover {
    background: var(--bg-primary);
}

.visibility-btn.selected {
    background: var(--text-primary);
    color: var(--bg-primary);
    border-color: var(--text-primary);
}

.modal-buttons {
    display: flex;
    gap: 10px;
    margin-top: 16px;
    justify-content: flex-end;
    align-items: center;
}

.modal-buttons .delete-btn {
    margin-right: auto;
    padding: 8px;
    background: none;
    border: 1px solid var(--input-border);
    border-radius: 4px;
    cursor: pointer;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color 0.15s ease, border-color 0.15s ease;
}

.modal-buttons .delete-btn:hover {
    color: #e53935;
    border-color: #e53935;
}

.modal-buttons button {
    padding: 8px 20px;
    border: none;
    border-radius: 4px;
    font-size: 14px;
    cursor: pointer;
    transition: background 0.15s ease;
}

#save-btn {
    background: #1976d2;
    color: #fff;
}

#save-btn:hover {
    background: #1565c0;
}

#cancel-btn {
    background: var(--button-secondary-bg);
    color: var(--text-secondary);
}

#cancel-btn:hover {
    background: var(--border-color);
}

/* Icon button (settings gear) */
.icon-btn {
    background: none;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 6px 8px;
    cursor: pointer;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color 0.15s ease, border-color 0.15s ease;
}

.icon-btn:hover {
    color: var(--text-primary);
    border-color: var(--text-muted);
}

/* Settings modal */
.settings-modal-content {
    max-width: 350px;
}

.settings-section {
    margin-bottom: 16px;
}

.settings-label {
    display: block;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.settings-description {
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 12px;
}

.birthday-inputs {
    display: flex;
    gap: 8px;
    align-items: center;
}

.birthday-inputs select,
.birthday-inputs input {
    padding: 8px 10px;
    border: 1px solid var(--input-border);
    border-radius: 4px;
    font-size: 14px;
    font-family: inherit;
    background: var(--input-bg);
    color: var(--text-primary);
}

.birthday-inputs select {
    flex: 1;
    min-width: 120px;
}

.birthday-inputs input {
    width: 70px;
}

.birthday-inputs select:focus,
.birthday-inputs input:focus {
    outline: none;
    border-color: #1976d2;
}

.clear-btn {
    background: none;
    border: 1px solid var(--input-border);
    border-radius: 4px;
    width: 32px;
    height: 32px;
    cursor: pointer;
    color: var(--text-muted);
    font-size: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color 0.15s ease, border-color 0.15s ease;
}

.clear-btn:hover {
    color: #e53935;
    border-color: #e53935;
}

#settings-save-btn {
    background: #1976d2;
    color: #fff;
}

#settings-save-btn:hover {
    background: #1565c0;
}

#settings-cancel-btn {
    background: var(--button-secondary-bg);
    color: var(--text-secondary);
}

#settings-cancel-btn:hover {
    background: var(--border-color);
}

/* Icon button positioning for badge */
.icon-btn {
    position: relative;
}

/* Notification badge */
.notification-badge {
    position: absolute;
    top: -4px;
    right: -4px;
    background: #e53935;
    color: #fff;
    font-size: 10px;
    font-weight: 600;
    min-width: 16px;
    height: 16px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 4px;
}

/* Friends modal */
.friends-modal-content {
    max-width: 400px;
}

.friends-section {
    margin-bottom: 20px;
}

.friends-section:last-of-type {
    margin-bottom: 16px;
}

.add-friend-inputs {
    display: flex;
    gap: 8px;
}

.add-friend-inputs input {
    flex: 1;
    padding: 8px 10px;
    border: 1px solid var(--input-border);
    border-radius: 4px;
    font-size: 14px;
    font-family: inherit;
    background: var(--input-bg);
    color: var(--text-primary);
}

.add-friend-inputs input:focus {
    outline: none;
    border-color: #1976d2;
}

.primary-btn {
    padding: 8px 16px;
    border: none;
    border-radius: 4px;
    font-size: 14px;
    cursor: pointer;
    background: #1976d2;
    color: #fff;
    transition: background 0.15s ease;
}

.primary-btn:hover {
    background: #1565c0;
}

.primary-btn:disabled {
    background: var(--button-secondary-bg);
    color: var(--text-muted);
    cursor: not-allowed;
}

.request-status {
    font-size: 13px;
    margin-top: 8px;
    min-height: 20px;
}

.request-status.success {
    color: #2e7d32;
}

.request-status.error {
    color: #c62828;
}

[data-theme="dark"] .request-status.success {
    color: #66bb6a;
}

[data-theme="dark"] .request-status.error {
    color: #ef5350;
}

.friends-list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.friends-list li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 0;
    border-bottom: 1px solid var(--border-light);
}

.friends-list li:last-child {
    border-bottom: none;
}

.friend-info {
    display: flex;
    align-items: center;
    gap: 10px;
}

.friend-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
}

.friend-name {
    font-size: 14px;
    color: var(--text-primary);
}

.friend-email {
    font-size: 12px;
    color: var(--text-muted);
}

.friend-actions {
    display: flex;
    gap: 6px;
}

.accept-btn {
    padding: 4px 12px;
    border: none;
    border-radius: 4px;
    font-size: 13px;
    cursor: pointer;
    background: #2e7d32;
    color: #fff;
    transition: background 0.15s ease;
}

.accept-btn:hover {
    background: #1b5e20;
}

.decline-btn,
.remove-btn {
    padding: 4px 12px;
    border: 1px solid var(--input-border);
    border-radius: 4px;
    font-size: 13px;
    cursor: pointer;
    background: none;
    color: var(--text-secondary);
    transition: color 0.15s ease, border-color 0.15s ease;
}

.decline-btn:hover,
.remove-btn:hover {
    border-color: #c62828;
    color: #c62828;
}

#friends-close-btn {
    background: var(--button-secondary-bg);
    color: var(--text-secondary);
}

#friends-close-btn:hover {
    background: var(--border-color);
}

/* Header layout */
.header-left {
    display: flex;
    align-items: center;
    gap: 10px;
}

/* View toggle */
.view-toggle {
    display: flex;
    gap: 4px;
    background: var(--bg-secondary);
    padding: 3px;
    border-radius: 8px;
}

.view-btn {
    background: none;
    border: none;
    border-radius: 5px;
    padding: 5px 8px;
    cursor: pointer;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color 0.15s ease, background 0.15s ease;
}

.view-btn:hover {
    color: var(--text-secondary);
}

.view-btn.active {
    background: var(--bg-primary);
    color: var(--text-primary);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

/* View containers */
.view-container {
    display: none;
}

.view-container.active {
    display: block;
}

/* List view */
.list-wrapper {
    max-height: calc(100vh - 120px);
    overflow-y: auto;
    scroll-behavior: smooth;
}

#list-calendar {
    display: flex;
    flex-direction: column;
    position: relative;
}

.list-month-header {
    position: sticky;
    top: 0;
    background: var(--bg-primary);
    padding: 12px 16px;
    font-weight: 600;
    font-size: 14px;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-color);
    z-index: 10;
}

.list-day {
    display: flex;
    align-items: flex-start;
    padding: 10px 16px;
    border-bottom: 1px solid var(--border-light);
    cursor: pointer;
    transition: background 0.15s ease;
    min-height: 44px;
    user-select: none;
}

.list-day:hover {
    background: var(--segment-hover);
}

.list-day.today {
    background: var(--range-selected);
}

.list-day.today:hover {
    background: var(--range-selected-weekend);
}

.list-day.weekend {
    background: var(--segment-weekend);
}

.list-day.weekend:hover {
    background: var(--segment-hover);
}

.list-day-date {
    width: 70px;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
}

.list-day-number {
    font-size: 18px;
    font-weight: 500;
    color: var(--text-primary);
    line-height: 1.2;
}

.list-day-weekday {
    font-size: 11px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.list-day-events {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding-top: 2px;
}

.list-day-events.multi-event {
    flex-direction: row;
}

.list-event {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 13px;
    color: var(--text-primary);
    transition: filter 0.15s ease;
}

.list-event:hover {
    filter: brightness(1.1);
}

.list-event-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
}

.list-event-title {
    flex: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.list-event.hidden-event {
    opacity: 0.5;
}

.list-event.compact {
    overflow: hidden;
}

.list-event.compact .list-event-title {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Multi-day event overlay */
#list-multiday-overlay {
    position: absolute;
    top: 0;
    left: 70px;
    right: 0;
    pointer-events: none;
    z-index: 5;
}

.list-multiday-event {
    position: absolute;
    border-radius: 4px;
    padding: 6px 8px;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-primary);
    display: flex;
    align-items: flex-start;
    gap: 6px;
    pointer-events: auto;
    cursor: pointer;
    border-left: 3px solid;
    transition: filter 0.15s ease;
    overflow: hidden;
    box-sizing: border-box;
}

/* Disable pointer events on multi-day events during drag selection */
#list-multiday-overlay.dragging .list-multiday-event {
    pointer-events: none;
}

.list-multiday-event:hover {
    filter: brightness(1.1);
}

.list-multiday-event.hidden-event {
    opacity: 0.5;
}

.list-multiday-event-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
    margin-top: 3px;
}

.list-multiday-event-title {
    flex: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    min-width: 0;
}

.list-multiday-event-range {
    font-size: 11px;
    color: var(--text-muted);
    flex-shrink: 0;
    white-space: nowrap;
}

/* Hide range and dot when space is tight */
.list-multiday-event.compact .list-multiday-event-range,
.list-multiday-event.compact .list-multiday-event-dot {
    display: none;
}

/* List view range selection overlay (green hue) */
#list-drag-highlight {
    position: absolute;
    left: 0;
    right: 0;
    background: rgba(0, 200, 134, 0.35);
    pointer-events: none;
    z-index: 10;
    border-radius: 4px;
}

[data-theme="dark"] #list-drag-highlight {
    background: rgba(0, 200, 134, 0.3);
}