:root {
    --midnight-indigo: #383D61;
    --warm-light-yellow: #FFD469;
    --light-mist-blue: #93A4BA;
    --fog-blue-gray: #7988AD;
    --smoky-brown-gray: #756765;
    --moss-gray-green: #889E82;

    --avatar-ygy: #626B8C;
    --avatar-zl: #E1E5EB;
    --avatar-ay: #786A62;
    --avatar-cs: #9EAD90;

    --pure-white: #FFFFFF;
    --pure-black: #151515;

    --gray-025: #FCFCFD;
    --gray-050: #FAFBFC;
    --gray-100: #F5F6F8;
    --gray-150: #F1F3F6;
    --gray-200: #ECEFF3;
    --gray-250: #E4E8EE;
    --gray-300: #D8DEE7;
    --gray-350: #CBD4E0;
    --gray-400: #A8B3C2;
    --gray-500: #7E8898;
    --gray-600: #5C6470;
    --gray-700: #3F4652;
    --gray-800: #252A33;

    --danger: #8A5371;
    --danger-soft: #F4EDEF;
    --success-soft: #EEF4EE;

    --shadow-xs: 0 1px 4px rgba(30, 41, 59, 0.05);
    --shadow-sm: 0 2px 10px rgba(30, 41, 59, 0.06);
    --shadow-md: 0 8px 24px rgba(30, 41, 59, 0.08);
    --shadow-lg: 0 18px 42px rgba(30, 41, 59, 0.14);

    --border-radius: 22px;
    --border-radius-md: 18px;
    --border-radius-sm: 14px;
    --border-radius-xs: 10px;

    --transition-fast: 0.16s ease;
    --transition-normal: 0.22s ease;
}

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

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC",
        "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", sans-serif;
    background: var(--gray-100);
    color: var(--gray-800);
    line-height: 1.55;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

button,
input,
textarea {
    font: inherit;
}

button {
    border: none;
    background: none;
}

input,
textarea {
    appearance: none;
    -webkit-appearance: none;
}

textarea {
    resize: vertical;
    font-family: inherit;
}

.app-container {
    width: min(1200px, 100%);
    margin: 0 auto;
    padding: 18px;
    min-height: 100vh;
}

.app-header {
    text-align: center;
    padding: 20px 0 14px;
}

.app-header h1 {
    font-size: 2rem;
    color: var(--midnight-indigo);
    font-weight: 700;
    letter-spacing: -0.03em;
    margin-bottom: 6px;
}

.subtitle {
    color: var(--gray-500);
    font-size: 0.95rem;
}

.timer-card,
.message-section,
.characters-section,
.question-section,
.today-plan-section,
.future-plan-section,
.records-section {
    background: var(--pure-white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    margin-bottom: 24px;
}

.timer-card {
    padding: 24px 22px;
}

.timer-input-group {
    margin-bottom: 18px;
}

.timer-input-group label,
.form-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 0.92rem;
    color: var(--gray-700);
    font-weight: 600;
}

.note-input-wrapper {
    display: flex;
    align-items: center;
    gap: 10px;
}

.note-input,
.form-input {
    width: 100%;
    border: 1.5px solid var(--gray-300);
    background: var(--pure-white);
    color: var(--gray-800);
    border-radius: var(--border-radius-sm);
    transition:
        border-color var(--transition-fast),
        box-shadow var(--transition-fast),
        background var(--transition-fast);
}

.note-input {
    padding: 13px 16px;
    min-height: 46px;
    font-size: 0.98rem;
}

.form-input {
    padding: 11px 13px;
    font-size: 0.95rem;
}

.note-input:focus,
.form-input:focus,
.duration-input:focus {
    outline: none;
    border-color: var(--midnight-indigo);
    box-shadow: 0 0 0 4px rgba(56, 61, 97, 0.08);
}

.form-input::placeholder,
.note-input::placeholder {
    color: var(--gray-400);
}

textarea.form-input {
    min-height: 96px;
}

.color-picker-wrapper {
    position: relative;
    flex-shrink: 0;
}

.color-picker-btn {
    width: 46px;
    height: 46px;
    border-radius: var(--border-radius-sm);
    border: 1.5px solid var(--gray-300);
    background: var(--pure-white);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 3px;
    transition:
        border-color var(--transition-fast),
        box-shadow var(--transition-fast),
        transform var(--transition-fast);
}

.color-picker-btn:hover {
    border-color: var(--midnight-indigo);
    transform: translateY(-1px);
}

.selected-color {
    width: 23px;
    height: 23px;
    border-radius: 7px;
    background: var(--midnight-indigo);
    box-shadow: inset 0 0 0 1px rgba(255,255,255,0.35);
}

.dropdown-arrow {
    font-size: 10px;
    color: var(--gray-500);
    line-height: 1;
}

.color-palette {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    z-index: 1000;
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 8px;
    padding: 12px;
    width: 252px;
    background: var(--pure-white);
    border: 1px solid var(--gray-250);
    border-radius: 14px;
    box-shadow: var(--shadow-md);
}

.color-option {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    cursor: pointer;
    border: 2px solid transparent;
    transition:
        transform var(--transition-fast),
        box-shadow var(--transition-fast),
        border-color var(--transition-fast);
}

.color-option:hover {
    transform: scale(1.06);
    box-shadow: var(--shadow-sm);
}

.color-option.selected {
    border-color: var(--gray-800);
}

.timer-display {
    text-align: center;
    color: var(--midnight-indigo);
    font-size: clamp(3.6rem, 10vw, 5.6rem);
    font-weight: 760;
    line-height: 1.05;
    letter-spacing: 0.03em;
    margin: 16px 0 24px;
    font-variant-numeric: tabular-nums;
}

.timer-controls {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.duration-setter {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 14px;
    background: var(--gray-150);
    border-radius: 999px;
    padding: 10px 16px;
}

.duration-btn {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    background: var(--pure-white);
    color: var(--midnight-indigo);
    font-size: 1.5rem;
    cursor: pointer;
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    transition:
        transform var(--transition-fast),
        background var(--transition-fast),
        color var(--transition-fast);
}

.duration-btn:hover:not(:disabled) {
    background: var(--midnight-indigo);
    color: var(--pure-white);
    transform: translateY(-1px);
}

.duration-input {
    width: 74px;
    text-align: center;
    border: none;
    background: transparent;
    font-weight: 700;
    font-size: 1.18rem;
    color: var(--gray-800);
}

.duration-input::-webkit-outer-spin-button,
.duration-input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.unit {
    color: var(--gray-600);
    font-size: 0.92rem;
    flex-shrink: 0;
}

.action-buttons,
.modal-actions {
    display: flex;
    gap: 12px;
}

.btn-primary,
.btn-secondary {
    flex: 1;
    min-height: 50px;
    border-radius: var(--border-radius-sm);
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition:
        transform var(--transition-fast),
        box-shadow var(--transition-fast),
        background var(--transition-fast),
        color var(--transition-fast);
}

.btn-primary {
    background: var(--midnight-indigo);
    color: var(--pure-white);
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: var(--gray-200);
    color: var(--gray-700);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--gray-250);
}

.btn-primary:disabled,
.btn-secondary:disabled,
.duration-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.message-section {
    padding: 16px 20px 18px;
}

.characters-section,
.question-section,
.today-plan-section,
.future-plan-section,
.records-section {
    padding: 20px;
}

.message-header,
.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 14px;
}

.records-header {
    align-items: flex-start;
    flex-wrap: wrap;
}

.message-header {
    color: var(--gray-700);
    font-size: 0.95rem;
    font-weight: 600;
}

.message-header-actions,
.section-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

.section-title {
    color: var(--gray-800);
    font-size: 1.12rem;
    font-weight: 700;
}

.section-desc {
    color: var(--gray-500);
    font-size: 0.88rem;
    margin-top: 4px;
}

.clear-message-btn,
.modal-close,
.calendar-nav-btn,
.inline-nav-btn {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background: var(--gray-200);
    color: var(--gray-600);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition:
        background var(--transition-fast),
        color var(--transition-fast),
        transform var(--transition-fast);
    flex-shrink: 0;
}

.clear-message-btn:hover,
.modal-close:hover,
.calendar-nav-btn:hover,
.inline-nav-btn:hover {
    background: var(--gray-250);
    color: var(--gray-800);
    transform: translateY(-1px);
}

.ghost-btn {
    min-height: 34px;
    padding: 0 12px;
    border-radius: 999px;
    background: var(--gray-200);
    color: var(--gray-700);
    font-size: 0.86rem;
    font-weight: 700;
    cursor: pointer;
    transition:
        background var(--transition-fast),
        color var(--transition-fast),
        transform var(--transition-fast);
}

.ghost-btn:hover {
    background: var(--gray-250);
    transform: translateY(-1px);
}

.message-bubble {
    background: var(--gray-150);
    border-left: 4px solid var(--midnight-indigo);
    border-radius: 18px 18px 18px 8px;
    padding: 16px 18px;
    min-height: 88px;
}

.message-meta {
    font-size: 0.8rem;
    color: var(--gray-500);
    margin-bottom: 6px;
}

#messageText {
    white-space: pre-wrap;
    word-break: break-word;
    color: var(--pure-black);
    font-size: 0.96rem;
}

.character-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 12px;
}

.character-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    background: var(--gray-150);
    border: 2px solid transparent;
    border-radius: var(--border-radius-md);
    padding: 16px 10px 14px;
    cursor: pointer;
    transition:
        transform var(--transition-fast),
        box-shadow var(--transition-fast),
        border-color var(--transition-fast),
        background var(--transition-fast),
        opacity var(--transition-fast);
}

.character-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
    border-color: rgba(56, 61, 97, 0.15);
    background: var(--pure-white);
}

.character-card.selected {
    background: var(--pure-white);
    border-color: rgba(56, 61, 97, 0.4);
    box-shadow: 0 0 0 4px rgba(56, 61, 97, 0.06);
}

.character-card.dimmed {
    opacity: 0.5;
}

.avatar-placeholder {
    width: 58px;
    height: 58px;
    border-radius: 50%;
    box-shadow: inset 0 0 0 1px rgba(255,255,255,0.4);
}

.avatar-ygy { background: var(--avatar-ygy); }
.avatar-zl { background: var(--avatar-zl); }
.avatar-ay { background: var(--avatar-ay); }
.avatar-cs { background: var(--avatar-cs); }

.character-name {
    font-size: 0.92rem;
    font-weight: 700;
    color: var(--gray-800);
}

.question-panel {
    margin-top: 2px;
}

.question-grid {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 10px;
}

.question-btn {
    min-height: 48px;
    padding: 12px 12px;
    border-radius: 14px;
    border: 1.5px solid var(--gray-300);
    background: var(--pure-white);
    color: var(--gray-700);
    font-size: 0.92rem;
    font-weight: 700;
    line-height: 1.3;
    text-align: center;
    cursor: pointer;
    transition:
        background var(--transition-fast),
        color var(--transition-fast),
        border-color var(--transition-fast),
        box-shadow var(--transition-fast),
        transform var(--transition-fast);
}

.question-btn:hover {
    background: var(--midnight-indigo);
    color: var(--pure-white);
    border-color: var(--midnight-indigo);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.today-plan-list,
.records-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.plan-item,
.record-item,
.today-plan-item {
    background: var(--gray-150);
    border-left: 4px solid var(--midnight-indigo);
    border-radius: var(--border-radius-sm);
    animation: fadeIn 0.22s ease-out;
}

.today-plan-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    padding: 14px 16px;
}

.plan-item {
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding: 14px 16px;
}

.record-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    padding: 14px 16px;
    cursor: pointer;
    transition: background var(--transition-fast);
}

.record-item:hover,
.today-plan-item:hover {
    background: var(--gray-200);
}

.plan-item.important,
.today-plan-item.important {
    box-shadow: inset 0 0 0 1px rgba(199, 103, 120, 0.18);
    background: linear-gradient(180deg, #fbf7f8 0%, #f6f0f2 100%);
}

.plan-info,
.record-info,
.today-plan-info {
    flex: 1;
    min-width: 0;
}

.plan-time,
.record-subject,
.today-plan-time {
    font-size: 0.96rem;
    font-weight: 700;
    color: var(--gray-800);
}

.plan-subject,
.record-time,
.record-note,
.today-plan-subject,
.today-plan-note {
    font-size: 0.86rem;
    color: var(--gray-600);
}

.plan-subject,
.today-plan-subject {
    margin-top: 2px;
}

.today-plan-meta,
.plan-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 4px;
}

.tag-chip {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 24px;
    padding: 0 10px;
    border-radius: 999px;
    background: var(--pure-white);
    color: var(--gray-700);
    font-size: 0.76rem;
    font-weight: 700;
    box-shadow: var(--shadow-xs);
}

.tag-chip.important {
    background: #F5E9EC;
    color: #8A5371;
}

.record-header {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 4px;
}

.record-duration {
    flex-shrink: 0;
    background: var(--pure-white);
    color: var(--midnight-indigo);
    border-radius: 999px;
    padding: 5px 10px;
    font-size: 0.88rem;
    font-weight: 700;
}

.plan-actions,
.record-actions,
.today-plan-actions {
    display: flex;
    gap: 8px;
    flex-shrink: 0;
}

.plan-actions button,
.record-actions button,
.today-plan-actions button {
    padding: 7px 10px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.82rem;
    font-weight: 700;
    transition:
        transform var(--transition-fast),
        opacity var(--transition-fast),
        background var(--transition-fast),
        color var(--transition-fast);
}

.plan-actions button:hover,
.record-actions button:hover,
.today-plan-actions button:hover {
    transform: translateY(-1px);
}

.plan-edit,
.record-edit,
.today-plan-edit {
    background: var(--light-mist-blue);
    color: var(--pure-black);
}

.plan-delete,
.record-delete,
.today-plan-delete {
    background: var(--smoky-brown-gray);
    color: var(--pure-white);
}

.record-detail,
.today-plan-detail {
    background: var(--gray-250);
    color: var(--gray-700);
}

.empty-hint {
    color: var(--gray-500);
    text-align: center;
    padding: 30px 0;
    font-size: 0.92rem;
}

.view-tabs {
    display: flex;
    gap: 6px;
    background: var(--gray-150);
    border-radius: 999px;
    padding: 4px;
}

.tab-btn {
    min-width: 56px;
    height: 38px;
    padding: 0 16px;
    border-radius: 999px;
    color: var(--gray-600);
    font-size: 0.9rem;
    font-weight: 700;
    cursor: pointer;
    transition:
        background var(--transition-fast),
        color var(--transition-fast),
        transform var(--transition-fast);
}

.tab-btn.active {
    background: var(--midnight-indigo);
    color: var(--pure-white);
}

.chart-container {
    margin: 18px 0 16px;
}

.chart-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 0;
}

.chart-label {
    min-width: 56px;
    color: var(--gray-700);
    font-size: 0.9rem;
    font-weight: 700;
}

.chart-bar-wrapper {
    flex: 1;
    min-height: 32px;
    display: flex;
    overflow: hidden;
    border-radius: 999px;
    background: var(--gray-200);
}

.chart-bar-segment {
    min-width: 2px;
    height: 32px;
    transition: width 0.24s ease;
}

.chart-bar-empty {
    flex: 1;
    height: 32px;
    background: transparent;
}

.chart-value {
    min-width: 84px;
    color: var(--gray-700);
    font-size: 0.9rem;
    text-align: right;
    font-weight: 600;
}

.sub-calendar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin: 6px 0 16px;
    padding: 10px 12px;
    background: var(--gray-150);
    border-radius: 16px;
}

.sub-calendar-title {
    font-size: 1rem;
    font-weight: 760;
    color: var(--midnight-indigo);
    text-align: center;
    flex: 1;
    line-height: 1.35;
}

#dayRecordNavigator,
#weekRecordNavigator {
    margin-top: 4px;
    margin-bottom: 14px;
}

.week-plan-board {
    display: grid;
    grid-template-columns: repeat(7, minmax(0, 1fr));
    gap: 12px;
}

.week-plan-day {
    min-width: 0;
    background: var(--gray-150);
    border-radius: 16px;
    padding: 12px 10px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    min-height: 180px;
}

.week-plan-day-header {
    display: flex;
    flex-direction: column;
    gap: 2px;
    border-bottom: 1px solid var(--gray-250);
    padding-bottom: 8px;
}

.week-plan-day-name {
    font-size: 0.86rem;
    font-weight: 760;
    color: var(--gray-800);
}

.week-plan-day-date {
    font-size: 0.76rem;
    color: var(--gray-500);
}

.week-plan-day-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.week-plan-title-card {
    padding: 10px 10px;
    border-radius: 12px;
    background: var(--pure-white);
    border-left: 4px solid var(--midnight-indigo);
    cursor: pointer;
    transition:
        transform var(--transition-fast),
        box-shadow var(--transition-fast),
        background var(--transition-fast);
}

.week-plan-title-card:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-xs);
}

.week-plan-title-card.important {
    background: #FBF4F6;
}

.week-plan-title-time {
    font-size: 0.74rem;
    color: var(--gray-500);
    margin-bottom: 4px;
}

.week-plan-title-text {
    font-size: 0.84rem;
    font-weight: 700;
    color: var(--gray-800);
    word-break: break-word;
}

.month-plan-grid {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 12px;
}

.month-plan-card {
    min-height: 148px;
    background: var(--gray-150);
    border-radius: 16px;
    padding: 12px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.month-plan-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    border-bottom: 1px solid var(--gray-250);
    padding-bottom: 8px;
}

.month-plan-card-title {
    font-size: 0.9rem;
    font-weight: 760;
    color: var(--gray-800);
}

.month-plan-card-count {
    font-size: 0.76rem;
    color: var(--gray-500);
    font-weight: 700;
}

.month-plan-important-list,
.month-plan-normal-list {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.month-plan-mini-item {
    display: flex;
    align-items: flex-start;
    gap: 6px;
    cursor: pointer;
}

.month-plan-mini-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    margin-top: 6px;
    flex-shrink: 0;
}

.month-plan-mini-text {
    font-size: 0.8rem;
    color: var(--gray-700);
    line-height: 1.35;
    word-break: break-word;
}

.month-plan-more {
    font-size: 0.76rem;
    color: var(--gray-500);
    margin-top: 2px;
}

.month-calendar-card {
    background: var(--pure-white);
    border: 1px solid var(--gray-250);
    border-radius: 22px;
    overflow: hidden;
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.8);
}

.month-calendar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    padding: 18px 18px 14px;
    background: linear-gradient(180deg, #f9fafc 0%, #f3f5f9 100%);
    border-bottom: 1px solid var(--gray-250);
}

.month-calendar-title {
    font-size: 1.35rem;
    font-weight: 760;
    color: var(--midnight-indigo);
    letter-spacing: -0.02em;
}

.month-weekdays {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    border-bottom: 1px solid var(--gray-250);
    background: var(--gray-050);
}

.month-weekday {
    text-align: center;
    padding: 10px 4px;
    color: var(--gray-500);
    font-size: 0.84rem;
    font-weight: 700;
    letter-spacing: 0.02em;
}

.month-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    background: var(--gray-250);
    gap: 1px;
}

.month-day-cell {
    min-height: 118px;
    background: var(--pure-white);
    padding: 10px 10px 8px;
    cursor: pointer;
    transition:
        background var(--transition-fast),
        transform var(--transition-fast);
    text-align: left;
}

.month-day-cell:hover {
    background: #fafbfd;
}

.month-day-cell.is-outside-month {
    background: var(--gray-050);
}

.month-day-cell.is-outside-month .month-day-number,
.month-day-cell.is-outside-month .month-day-total {
    opacity: 0.38;
}

.month-day-cell.is-today {
    background: rgba(56, 61, 97, 0.04);
    box-shadow: inset 0 0 0 2px rgba(56, 61, 97, 0.18);
}

.month-day-top {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 8px;
    margin-bottom: 10px;
}

.month-day-number {
    font-size: 1.02rem;
    font-weight: 750;
    color: var(--gray-800);
    line-height: 1;
}

.month-day-total {
    font-size: 0.74rem;
    color: var(--gray-500);
    font-weight: 700;
    white-space: nowrap;
    line-height: 1;
}

.month-day-bar {
    width: 100%;
    height: 10px;
    display: flex;
    overflow: hidden;
    border-radius: 999px;
    background: var(--gray-200);
    margin-bottom: 8px;
}

.month-day-segment {
    height: 10px;
    min-width: 2px;
}

.month-day-empty {
    width: 100%;
    height: 10px;
    background: transparent;
}

.month-records-tip {
    background: var(--gray-150);
    color: var(--gray-600);
    border-radius: 14px;
    padding: 12px 14px;
    font-size: 0.9rem;
}

.calendar-nav-btn {
    background: var(--gray-200);
}

.checkbox-group {
    display: flex;
    flex-direction: column;
}

.checkbox-card {
    min-height: 46px;
    padding: 0 14px;
    border: 1.5px solid var(--gray-300);
    border-radius: var(--border-radius-sm);
    display: inline-flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    background: var(--pure-white);
    color: var(--gray-700);
    transition:
        border-color var(--transition-fast),
        box-shadow var(--transition-fast),
        background var(--transition-fast);
}

.checkbox-card:hover {
    border-color: var(--midnight-indigo);
}

.checkbox-card input[type="checkbox"] {
    width: 18px;
    height: 18px;
    border-radius: 5px;
    border: 1.5px solid var(--gray-350);
    background: var(--pure-white);
    position: relative;
    cursor: pointer;
}

.checkbox-card input[type="checkbox"]:checked {
    background: var(--midnight-indigo);
    border-color: var(--midnight-indigo);
}

.checkbox-card input[type="checkbox"]:checked::after {
    content: "✓";
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    color: var(--pure-white);
    font-weight: 800;
}

.detail-modal,
.record-modal,
.plan-modal {
    position: fixed;
    inset: 0;
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-overlay {
    position: absolute;
    inset: 0;
    background: rgba(15, 23, 42, 0.42);
    backdrop-filter: blur(4px);
}

.modal-content {
    position: relative;
    width: min(480px, 92vw);
    max-height: 84vh;
    overflow-y: auto;
    background: var(--pure-white);
    border-radius: 22px;
    box-shadow: var(--shadow-lg);
}

.detail-modal-content {
    width: min(560px, 92vw);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 16px 18px;
    border-bottom: 1px solid var(--gray-200);
    font-weight: 700;
    color: var(--gray-800);
}

.modal-body {
    padding: 18px;
}

.form-group {
    margin-bottom: 18px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.add-plan-btn,
.add-record-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 9px 16px;
    background: var(--midnight-indigo);
    color: var(--pure-white);
    border-radius: 999px;
    font-size: 0.92rem;
    font-weight: 700;
    cursor: pointer;
    transition:
        transform var(--transition-fast),
        box-shadow var(--transition-fast),
        background var(--transition-fast);
}

.add-plan-btn:hover,
.add-record-btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.detail-row {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 12px 0;
    border-bottom: 1px solid var(--gray-200);
}

.detail-row:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.detail-label {
    font-size: 0.8rem;
    color: var(--gray-500);
    font-weight: 700;
}

.detail-value {
    font-size: 0.95rem;
    color: var(--gray-800);
    white-space: pre-wrap;
    word-break: break-word;
}

.detail-color-preview {
    width: 28px;
    height: 28px;
    border-radius: 8px;
    box-shadow: inset 0 0 0 1px rgba(255,255,255,0.4);
}

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

.hidden {
    display: none !important;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (max-width: 1100px) {
    .question-grid {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }

    .month-plan-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .week-plan-board {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }
}

@media (max-width: 900px) {
    .character-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .question-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .week-plan-board {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .month-plan-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .month-day-cell {
        min-height: 98px;
        padding: 8px;
    }

    .month-calendar-title {
        font-size: 1.18rem;
    }
}

@media (max-width: 768px) {
    .app-container {
        padding: 12px;
    }

    .app-header {
        padding-top: 16px;
    }

    .app-header h1 {
        font-size: 1.72rem;
    }

    .timer-card,
    .message-section,
    .characters-section,
    .question-section,
    .today-plan-section,
    .future-plan-section,
    .records-section {
        border-radius: 18px;
    }

    .timer-card,
    .characters-section,
    .question-section,
    .today-plan-section,
    .future-plan-section,
    .records-section {
        padding: 18px;
    }

    .message-section {
        padding: 14px 16px 16px;
    }

    .form-row {
        grid-template-columns: 1fr;
        gap: 8px;
    }

    .note-input-wrapper {
        align-items: stretch;
    }

    .color-picker-btn {
        width: 44px;
        height: 44px;
    }

    .chart-item {
        flex-wrap: wrap;
        gap: 8px;
    }

    .chart-label {
        min-width: 100%;
    }

    .chart-value {
        min-width: auto;
        width: 100%;
        text-align: left;
        padding-left: 56px;
    }

    .message-header,
    .section-header {
        align-items: flex-start;
    }

    .message-header-actions,
    .section-actions {
        flex-shrink: 0;
    }

    .record-item,
    .today-plan-item {
        flex-direction: column;
        align-items: flex-start;
    }

    .record-actions,
    .today-plan-actions,
    .plan-actions {
        width: 100%;
        justify-content: flex-start;
        flex-wrap: wrap;
    }

    .sub-calendar-header {
        padding: 10px;
    }

    .sub-calendar-title {
        font-size: 0.94rem;
    }
}

@media (max-width: 600px) {
    .duration-setter {
        gap: 10px;
        padding: 8px 12px;
    }

    .duration-input {
        width: 64px;
        font-size: 1.05rem;
    }

    .character-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 10px;
    }

    .question-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 10px;
    }

    .question-btn {
        min-height: 46px;
        font-size: 0.9rem;
        padding: 11px 10px;
    }

    .view-tabs {
        width: 100%;
    }

    .tab-btn {
        flex: 1;
        min-width: 0;
    }

    .week-plan-board,
    .month-plan-grid {
        grid-template-columns: 1fr;
    }

    .month-grid {
        grid-template-columns: repeat(7, 1fr);
    }

    .month-day-cell {
        min-height: 82px;
        padding: 7px 6px;
    }

    .month-day-number {
        font-size: 0.92rem;
    }

    .month-day-total {
        font-size: 0.68rem;
    }

    .color-palette {
        grid-template-columns: repeat(5, 1fr);
        width: 252px;
        right: -6px;
    }

    .modal-content {
        width: min(94vw, 520px);
        max-height: 88vh;
        border-radius: 18px;
    }
}

@media (max-width: 420px) {
    .app-container {
        padding: 10px;
    }

    .app-header h1 {
        font-size: 1.54rem;
    }

    .subtitle {
        font-size: 0.88rem;
    }

    .timer-display {
        font-size: clamp(3rem, 16vw, 4.1rem);
    }

    .action-buttons,
    .modal-actions {
        flex-direction: column;
    }

    .duration-btn {
        width: 38px;
        height: 38px;
    }

    .character-card {
        padding: 14px 8px 12px;
    }

    .avatar-placeholder {
        width: 52px;
        height: 52px;
    }

    .question-btn {
        font-size: 0.88rem;
    }

    .message-bubble {
        padding: 14px 14px;
    }

    .sub-calendar-header {
        gap: 8px;
    }

    .sub-calendar-title {
        font-size: 0.9rem;
    }
}