@charset "utf-8";

:root {
    --stamp-surface: var(--card-bg-color);
    --stamp-surface-muted: rgb(from var(--container-bg-color) r g b / 0.82);
    --stamp-sidebar-bg: rgb(from var(--container-bg-color) r g b / 0.92);
    --stamp-hover-bg: rgb(from var(--accent-color) r g b / 0.1);
    --stamp-active-bg: rgb(from var(--accent-color) r g b / 0.18);
    --stamp-empty-bg: rgb(from var(--card-bg-color) r g b / 0.36);
    --stamp-text: var(--content-font-color);
    --stamp-title: var(--title-font-color);
    --stamp-muted: rgb(from var(--content-font-color) r g b / 0.68);
    --stamp-placeholder: rgb(from var(--form-text-color) r g b / 0.55);
    --stamp-border: var(--card-border-color);
    --stamp-border-soft: rgb(from var(--card-border-color) r g b / 0.8);
    --stamp-shadow-color: rgb(from var(--black) r g b / 0.14);
    --stamp-overlay-bg: rgb(from var(--black) r g b / 0.46);
    --stamp-overlay-text: var(--white);
    --stamp-success: var(--success-color);
    --stamp-warning: var(--warning-color);
    --stamp-danger: var(--error-color);
    --stamp-danger-hover: rgb(from var(--error-color) r g b / 0.86);
}

/*******************/
/* 글 작성 */
/*******************/

/* 색상 선택기 스타일 */
.challenge_form .color_picker_container {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 5px;
    position: relative;
}

.challenge_form .form_color {
    width: 50px;
    height: 40px;
    padding: 0;
    border: none;
    border-radius: 4px;
    background: transparent;
    cursor: pointer;
}

.challenge_form .color_code {
    width: 120px;
}

.challenge_form .btn_clear {
    position: relative;
    left: -5px;
    top: 50%;
    width: 20px;
    height: 20px;
    border: none;
    background: transparent;
    color: var(--stamp-text);
    font-size: 14px;
    line-height: 1;
    cursor: pointer;
    opacity: 0.6;
    transition: opacity 0.2s;
}

.challenge_form .btn_clear:hover {
    opacity: 1;
}

.challenge_form .color_presets {
    display: flex;
    gap: 8px;
    margin-left: 0px;
}

.challenge_form .preset {
    width: 25px;
    height: 25px;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 1px 3px var(--stamp-shadow-color);
    transition: transform 0.2s;
}

/* 프리셋 초기 색상 (JavaScript로 덮어씀) */
.challenge_form .preset-accent {
    background-color: var(--accent-color);
}

.challenge_form .preset-red {
    background-color: var(--stamp-danger);
}

.challenge_form .preset-yellow {
    background-color: var(--stamp-warning);
}

.challenge_form .preset-green {
    background-color: var(--stamp-success);
}

.challenge_form .preset:hover {
    transform: scale(1.1);
}

.challenge_form .form_help {
    width: 100%;
    margin-bottom: 5px;
    font-size: 12px;
    color: var(--stamp-muted);
}

/* 타입 선택기 스타일 */
.challenge_form .type_selector {
    margin-bottom: 20px;
}

.challenge_form .type_options {
    display: flex;
    gap: 10px;
}

.challenge_form .type_option {
    display: flex;
    flex-direction: row;
    align-items: center;
    cursor: pointer;
    padding: 10px;
    border-radius: 8px;
    border: 0;
    gap: 6px;
    transition: all 0.2s;
}

.challenge_form .type_option:hover {
    background-color: var(--stamp-hover-bg);
}

.challenge_form .type_option input[type="radio"] {
    position: absolute;
    opacity: 0;
}

.type_option input[type="radio"]:checked + .type_icon {
    color: var(--accent-color);
}

.type_option input[type="radio"]:checked + .type_icon + .type_label {
    color: var(--accent-color);
    font-weight: bold;
}

.type_option input[type="radio"]:checked ~ .type_option {
    border-color: var(--accent-color);
    background-color: var(--stamp-hover-bg);
}

.challenge_form .type_icon {
    font-size: 13px;
    color: var(--stamp-text);
    transition: color 0.2s;
}

.challenge_form .type_label {
    font-size: 16px;
    transition: color 0.2s;
}

.challenge_form .wr_content #cal_content {
    font-family: var(--content-font-family);
    box-sizing: border-box;
    border: 1px solid var(--stamp-border);
    border-radius: 6px;
    max-width: 100%;
    font-size: 12px;
    padding: 6px 8px;
    background: var(--form-bg-color);
    color: var(--form-text-color);
}

.challenge_form .wr_content #cal_content::placeholder {
    color: var(--stamp-placeholder);
}

.challenge_form .btn_area {
    display: flex;
    justify-content: center;
    margin-top: 20px;
}

.challenge_form .wr_chk {
    display: flex;
    align-items: center;
    flex-direction: row;
    gap: 3px;
    font-size: 13px;
    font-weight: 400;
    color: var(--stamp-title);
}

.challenge_form input#wr_7,
.challenge_form .repeat_options input[type="checkbox"],
.challenge_form .weekday_options input[type="checkbox"] {
    width: 16px;
    height: 16px;
}

.challenge_form .repeat_group {
    gap: 8px;
}

.challenge_form .repeat_options,
.challenge_form .weekday_options {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px 14px;
}

.challenge_form .weekday_options {
    padding: 10px 12px;
    border: 1px solid var(--stamp-border);
    border-radius: 6px;
    background: var(--stamp-empty-bg);
}

.challenge_form .anniversary_repeat {
    padding-top: 2px;
}

/*******************/
/* 공통 스타일 */
/*******************/

#challenge_board, .challenge_form, #challenge_view {
    font-family: var(--content-font-family);
    margin: 30px auto;
}

.challenge_form {
    max-width: 1000px;
}

.challenge_title {
    font-size: 22px;
    font-weight: 500;
    margin-bottom: 20px;
    padding-bottom: 12px;
    color: var(--stamp-title);
}

/*******************/
/* 리스트 */
/*******************/

.challenge_list .challenge_actions .btn_del, .challenge_list .challenge_actions .btn_edit {
    padding: 0px;
    margin-left: 2px;
    background: transparent;
    background-color: transparent;
    backdrop-filter: none;
    box-shadow: none;
    color: var(--stamp-muted);
    font-weight: 300;
    font-size: 10px;
}

.challenge_list .challenge_list_header .btn_create {
    display: inline-block;
    padding: 5px 10px;
    margin: 0 2px;
    border-radius: 6px;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    text-decoration: none;
    text-align: center;
    box-shadow: 0 1px 3px var(--stamp-shadow-color);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: none;
    background: var(--btn-accent-bg);
    color: var(--btn-accent-text);
    transition: all 0.2s ease;
}

.challenge_list .challenge_list_header .btn_create:hover {
    background: rgb(from var(--btn-accent-bg) r g b / 0.9);
    color: var(--btn-accent-text);
}

.challenge_list .load_more_wrap .btn_load_more {
    width: 100%;
    text-align: center;
    font-size: 11px;
    font-family: var(--content-font-family);
    padding: 5px;
    border-radius: 5px;
    transition: all 0.2s ease;
    background: var(--stamp-surface);
    color: var(--stamp-title);
    border: 1px solid var(--stamp-border-soft);
}

.challenge_list .load_more_wrap .btn_load_more:hover {
    background: var(--stamp-hover-bg);
    transform: translateY(-1px);
}

.btn_submit, .btn_cancel, .btn_edit, .btn_del, .btn_list, .btn_stamp {
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    margin: 0;
    box-sizing: border-box;
    background: none;
    border: none;
    font: inherit;
    display: inline-block;
    padding: 8px 16px;
    margin: 0 2px;
    border-radius: 6px;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    text-decoration: none;
    text-align: center;
    transition: all 0.2s ease;
    box-shadow: 0 1px 3px var(--stamp-shadow-color);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: none;
}

.btn_submit, .btn_stamp {
    background: var(--btn-accent-bg);
    color: var(--btn-accent-text);
}

.btn_submit:hover, .btn_stamp:hover {
    background: rgb(from var(--btn-accent-bg) r g b / 0.9);
    transform: translateY(-1px);
    box-shadow: 0 2px 5px var(--stamp-shadow-color);
}

.btn_cancel, .btn_list {
    background: rgb(from var(--btn-secondary-bg) r g b / 0.78);
    color: var(--btn-secondary-text);
}

.btn_cancel:hover, .btn_list:hover {
    background: rgb(from var(--btn-secondary-bg) r g b / 0.92);
    transform: translateY(-1px);
}

.btn_edit {
    background: rgb(from var(--btn-secondary-bg) r g b / 0.78);
    color: var(--btn-secondary-text);
}

.btn_edit:hover {
    background: rgb(from var(--btn-secondary-bg) r g b / 0.92);
    transform: translateY(-1px);
}

.btn_del {
    background: var(--stamp-danger);
    color: var(--white);
}

.btn_del:hover {
    background: var(--stamp-danger-hover);
    transform: translateY(-1px);
}

/* 목록 페이지 스타일 */
.challenge_container {
    display: flex;
    gap: 10px;
}

.challenge_list {
    flex: 0 0 300px; /* 고정 너비로 좁게 설정 */
    background: var(--stamp-sidebar-bg);
    border-radius: 8px;
    padding: 15px;
    box-shadow: 0 4px 15px var(--stamp-shadow-color);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    height: fit-content;
}

.challenge_list .challenge_list_header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 10px;
}

.challenge_list .list_tabs {
    display: flex;
    gap: 5px;
    align-items: center;
    flex-direction: row;
    width: 100%;
}

.challenge_list .list_tabs .tab {
}

.challenge_list .list_tabs .tab a {
    font-weight: 500;
    background: transparent;
    color: var(--stamp-title);
    display: flex;
    align-items: center;
    padding: 4px 7px;
    margin: 2px 0;
    border-radius: 6px;
    cursor: pointer;
    font-size: 13px;
    gap: 6px;
    transition: all 0.2s ease;
}

.challenge_list .list_tabs .tab a i {
    font-size: 11px;
    color: var(--stamp-border);
}

.challenge_list .list_tabs .tab.active a i {
    color: var(--accent-color);
}

.challenge_list h3 a:hover {
    background: var(--stamp-hover-bg);
    transform: translateY(-1px);
}

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

.challenge_list li {
    margin-bottom: 8px;
    border-radius: 8px;
    transition: all 0.2s ease;
    background: var(--stamp-surface);
    border: 1px solid var(--stamp-border-soft);
}

.challenge_list .no_content p {
    text-align: center;
    padding: 10px;
    color: var(--stamp-muted);
}

.challenge_list li a {
    display: block;
    padding: 12px 15px 0px 15px;
    text-decoration: none;
    color: var(--stamp-text);
}

.challenge_list li:hover {
    background: var(--stamp-hover-bg);
    transform: translateY(-1px);
}

.challenge_list li.active {
    background: var(--stamp-active-bg);
    border-left: 3px solid var(--accent-color);
}

.challenge_item h4,
.event_item h4  {
    font-size: 13px;
    color: var(--stamp-title);
    font-weight: 500;
}

.challenge_item p,
.event_item p {
    margin: 0;
    font-size: 11px;
    color: var(--stamp-muted);
}

.challenge_item .period {
    color: var(--stamp-muted);
}

.challenge_item .reward {
    color: var(--accent-color);
}

.challenge_item {
    position: relative;
    overflow: visible; /* 도장이 아이템 밖으로 나갈 수 있도록 */
}

.challenge_list_stamp {
    position: absolute;
    top: 5px;
    right: 10px;
    width: 40px;
    height: 40px;
    z-index: 10;
    transition: all 0.2s ease; /* 부드러운 효과 추가 */
}

.challenge_list_stamp img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

/* 호버 시 약간 움직이는 효과 추가 */
.challenge_item:hover .challenge_list_stamp {
    transform: scale(1.05) rotate(5deg);
}

.challenge_actions {
    display: flex;
    justify-content: flex-end;
    padding: 0 12px 8px;
    gap: 3px;
}

.challenge_actions a {
    font-size: 11px;
    padding: 3px 7px;
    margin-left: 5px;
}

.challenge_calendar {
    flex: 1; /* 남은 공간 모두 차지 */
    background: var(--stamp-surface);
    border-radius: 8px;
    padding: 15px;
    box-shadow: 0 4px 15px var(--stamp-shadow-color);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border: 1px solid var(--stamp-border);
    position: relative;
}

.calendar_nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.calendar_nav h3 {
    font-size: 16px;
    margin: 0;
    font-weight: 500;
    color: var(--stamp-title);
}

.calendar_nav .btn_calendar {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 15px;
    padding: 3px 8px;
    background: var(--stamp-surface-muted);
    color: var(--accent-color);
    border: none;
    border-radius: 6px;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.2s ease;
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
}

.btn_prev, .btn_next {
    background: var(--stamp-surface-muted);
    color: var(--stamp-title);
    border: none;
    padding: 5px 10px;
    border-radius: 6px;
    cursor: pointer;
    text-decoration: none;
    font-size: 10px;
    transition: all 0.2s ease;
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
}

.btn_prev:hover, .btn_next:hover,
.calendar_nav .btn_calendar:hover {
    background: var(--stamp-hover-bg);
    transform: translateY(-1px);
}

.calendar {
    width: 100%;
    border-collapse: separate;
    border-spacing: 2px;
}

.calendar thead th {
    padding: 10px;
    text-align: center;
    background: rgb(from var(--white) r g b / 0.05);
    border-radius: 6px;
    font-weight: 500;
    font-size: 13px;
    position: relative;
    z-index: 5;
    color: var(--stamp-title);
}

.calendar tbody td {
    height: 100px;
    vertical-align: top;
    padding: 5px;
    background: rgb(from var(--white) r g b / 0.03);
    border-radius: 6px;
    position: relative;
    color: var(--stamp-text);
}

.calendar td:hover {
    background: rgb(from var(--white) r g b / 0.07);
}

.calendar td.selecting,
.calendar td.drag-over {
    background: var(--stamp-active-bg);
    outline: 1px dashed var(--accent-color);
    outline-offset: -3px;
}

.calendar td.empty {
    background: var(--stamp-empty-bg);
}

.calendar td.today {
    background: rgb(from var(--accent-color) r g b / 0.1);
    box-shadow: 0 0 0 1px rgb(from var(--accent-color) r g b / 0.1);
}

.calendar .date {
    font-size: 13px;
    font-weight: 500;
    margin-bottom: 5px;
    color: var(--stamp-text);
}

.calendar td.today .date {
    color: var(--accent-color);
}

/* 챌린지 달력 컨테이너 */
.calendar_container {
    position: relative;
    width: 100%;
    margin-bottom: 30px;
}

.stamp {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 45px;
    transition: all 0.2s ease;
}

.stamp img {
    max-width: 50px;
    max-height: 50px;
    transition: all 0.2s ease;
    filter: drop-shadow(0 1px 2px var(--stamp-shadow-color));
}

.stamp.completed img {
    opacity: 1;
    transform: scale(1.05);
}

.stamp.default img {
    opacity: 0.6;
}

.stamp.clickable:hover img {
    transform: scale(1.1);
}

.cell_stamp {
    position: absolute;
    max-width: 70%;
    max-height: 70%;
    z-index: 5;
    transition: all 0.2s ease;
    filter: drop-shadow(0 1px 2px var(--stamp-shadow-color));
}

.cell_stamp a {
    display: block;
    width: 100%;
    height: 100%;
}

.cell_stamp img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.cell_stamp:hover {
    opacity: 1 !important;
    z-index: 10 !important;
}

.cell_stamp[draggable="true"],
.event_bar[draggable="true"] {
    cursor: grab;
}

.cell_stamp.dragging,
.event_bar.dragging {
    cursor: grabbing;
    opacity: 0.45 !important;
}

/* 글쓰기 페이지 스타일 */
.challenge_form .challenge_flex {
    display: flex;
    align-items: center;
    gap: 10px;
}

.challenge_form {
    background: var(--stamp-surface);
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 4px 15px var(--stamp-shadow-color);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border: 1px solid var(--stamp-border);
}

.form_row {
    margin-bottom: 18px;
}

.form_row label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 6px;
    color: var(--stamp-title);
}

.form_input {
    width: 100%;
    padding: 5px 10px;
    border: 1px solid var(--stamp-border);
    border-radius: 6px;
    font-size: 12px;
    background: var(--stamp-surface-muted);
    color: var(--stamp-text);
    transition: all 0.2s ease;
}

.form_input::placeholder {
    color: var(--stamp-placeholder);
}

.form_input:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 2px rgb(from var(--accent-color) r g b / 0.2);
    outline: none;
}

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

.date_range input {
    flex: 1;
}

.stamp_images {
    display: flex;
    gap: 15px;
}

.stamp_item {
    flex: 1;
    padding: 15px;
    background: var(--stamp-surface);
    border-radius: 8px;
}

.stamp_item p {
    font-size: 13px;
    color: var(--stamp-muted);
}

.url_input_container {
    margin-top: 3px;
}

.challenge_form input[type="text"], .challenge_form input[type="password"], .challenge_form input[type="file"] {
    font-family: var(--content-font-family);
    box-sizing: border-box;
    border: 1px solid var(--stamp-border);
    height: 30px;
    border-width: 1px;
    border-style: solid;
    padding: 0 10px;
    max-width: 100%;
    font-size: 12px;
    padding: 3px 8px;
    background: var(--form-bg-color);
    color: var(--form-text-color);
}

/* 보기 페이지 스타일 */
.challenge_header {
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--stamp-border);
}

.challenge_header h2 {
    font-size: 20px;
    font-weight: 500;
    margin-bottom: 10px;
    color: var(--stamp-title);
}

.challenge_info {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin: 10px 0;
}

.challenge_info span {
    font-size: 13px;
    color: var(--stamp-muted);
}

.challenge_status {
    padding: 3px 8px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 500;
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
}

.challenge_status.진행중 {
    background: var(--stamp-success);
    color: var(--white);
}

.challenge_status.시작전 {
    background: var(--stamp-warning);
    color: var(--gray-900);
}

.challenge_status.종료 {
    background: rgb(from var(--gray-700) r g b / 0.78);
    color: var(--white);
}

.challenge_author {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    font-size: 12px;
    color: var(--stamp-muted);
}

.challenge_content {
    margin-bottom: 25px;
    line-height: 1.6;
    font-size: 14px;
    color: var(--stamp-text);
}

.challenge_stamp {
    background: rgb(from var(--black) r g b / 0.2);
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 25px;
    text-align: center;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--stamp-border);
}

.challenge_stamp h3 {
    font-size: 16px;
    margin-bottom: 15px;
    font-weight: 500;
    color: var(--stamp-title);
}

.stamp_complete {
    text-align: center;
}

.stamp_complete p {
    font-size: 15px;
    color: var(--stamp-success);
    font-weight: 500;
    margin-bottom: 10px;
}

.stamp_image {
    display: flex;
    justify-content: center;
}

.stamp_image img {
    max-width: 70px;
    max-height: 70px;
    transition: all 0.2s ease;
    filter: drop-shadow(0 1px 3px var(--stamp-shadow-color));
}

.stamp_image img:hover {
    transform: scale(1.05);
}

.stamp_action {
    margin-top: 10px;
}

.challenge_btn_area {
}

/* 파일 삭제 버튼 */
.delete_file {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-top: 5px;
    padding: 4px 10px;
    border: 1px solid var(--stamp-border);
    border-radius: 4px;
    background: rgb(from var(--btn-secondary-bg) r g b / 0.78);
    color: var(--btn-secondary-text);
    font-size: 14px;
    line-height: 1.4;
    cursor: pointer;
}

.delete_file:hover,
.delete_file:focus {
    background: rgb(from var(--btn-secondary-bg) r g b / 0.92);
    color: var(--btn-secondary-text);
}

.delete_file.disabled,
.delete_file:disabled {
    opacity: 0.55;
    cursor: progress;
}

.file_preview {
    margin-top: 10px;
    padding: 10px;
    border: 1px solid var(--stamp-border);
    border-radius: 4px;
    background-color: var(--form-bg-color);
}

.file_preview img {
    max-width: 100px;
    max-height: 100px;
    margin-bottom: 5px;
}

.file_preview p {
    margin: 5px 0;
    font-size: 13px;
    color: var(--stamp-muted);
}

/* 모달 스타일 */
.challenge_event_modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgb(from var(--black) r g b / 0.4);
}

.challenge_event_modal_content {
    background: var(--stamp-surface);
    margin: 10vh auto;
    padding: 20px;
    border: 1px solid var(--stamp-border);
    box-shadow: 0 3px 5px var(--stamp-shadow-color);
    width: 80%;
    max-width: 500px;
    max-height: 78vh;
    overflow-y: auto;
    border-radius: 5px;
    position: relative;
}

.close {
    color: var(--stamp-muted);
    position: absolute;
    top: 10px;
    right: 10px;
    width: 32px;
    height: 32px;
    padding: 0;
    border: 0;
    border-radius: 6px;
    background: transparent;
    font-size: 28px;
    font-weight: bold;
    line-height: 28px;
    cursor: pointer;
}

.close:hover,
.close:focus-visible {
    background: var(--stamp-hover-bg);
    color: var(--stamp-title);
}

#challenge_event_title {
    padding-right: 36px;
}

#challenge_event_image_container {
    text-align: center;
    margin: 10px 0;
}

#challenge_event_image {
    max-width: 100%;
    max-height: 200px;
    object-fit: contain;
    border-radius: 6px;
}

#challenge_event_date {
    color: var(--stamp-muted);
    margin-bottom: 10px;
}

#challenge_event_content {
    margin: 10px 0;
    line-height: 1.6;
    word-break: break-word;
}

#challenge_event_content .unused-images-area {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 10px;
}

#challenge_event_content .auto_link_image,
#challenge_event_content .content-image,
#challenge_event_content .unused-image {
    display: block;
    max-width: 100%;
    height: auto;
    border-radius: 6px;
}

#challenge_event_content .auto_link_video {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 9;
    margin: 10px 0;
}

#challenge_event_content .auto_link_video iframe {
    width: 100%;
    height: 100%;
    border: 0;
    border-radius: 6px;
}

.challenge_event_modal_actions {
    margin-top: 15px;
    text-align: right;
}

.challenge_event_modal_actions a {
    margin-left: 10px;
}

/* 일정 */
#challenge_board .calendar .date {
    position: relative;
    z-index: 5;
    font-weight: bold;
    margin-bottom: 3px;
}

/* 일정 배경 이미지 스타일 */
#challenge_board .calendar_event_bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    z-index: 1;
    pointer-events: none;
    cursor: default;
    opacity: 0.7;
    transition: opacity 0.2s;
    border-radius: 6px;
    overflow: hidden;
}

#challenge_board .calendar_event_bg:hover {
    opacity: 0.7;
}

#challenge_board .cell_event_bg {
    pointer-events: none;
}

#challenge_board .event_overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgb(from var(--white) r g b / 0.3) 0%, rgb(from var(--black) r g b / 0.1) 100%);
    z-index: 2;
}

#challenge_board .event_title_bg {
    position: absolute;
    bottom: 5px;
    left: 5px;
    right: 5px;
    padding: 1px 5px;
    background: var(--stamp-overlay-bg);
    color: var(--stamp-overlay-text);
    font-size: 11px;
    border-radius: 3px;
    z-index: 3;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    display: none; /* 중요 */
}

/* 이미지 없는 일정 바 스타일 */
#challenge_board .calendar_event_bars {
    position: relative;
    z-index: 4;
    margin-top: 25px;
}

#challenge_board .calendar_event_bar {
    margin-bottom: 2px;
    padding: 2px 4px;
    border-radius: 3px;
    font-size: 11px;
    cursor: pointer;
    color: var(--stamp-overlay-text);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    box-shadow: 0 1px 2px rgb(from var(--black) r g b / 0.2);
    display: none; /* 중요 */
}

#challenge_board .calendar_event_more {
    position: absolute;
    bottom: 3px;
    right: 3px;
    background-color: rgb(from var(--black) r g b / 0.5);
    color: var(--stamp-overlay-text);
    font-size: 10px;
    padding: 1px 4px;
    border-radius: 6px;
    z-index: 6;
}

/* 스탬프 위치 조정 */
#challenge_board .stamp {
    position: relative;
    z-index: 5; /* 일정 배경 위에 표시 */
}

/* 기본적으로 모바일 버튼 영역 숨김 */
.challenge_m_btn_area {
    display: none;
}

.challenge_bars_container .challenge_bars .challenge_bar a,
.event_bars_container .event_bars .event_bar a {
    color: var(--stamp-overlay-text);
}


/* 반응형 스타일 개선 */
@media (max-width: 768px) {
    #challenge_board {
        height: 100vh; /* 뷰포트 높이 100%로 설정 */
        max-height: 100vh; /* 최대 높이 제한 */
        padding: 0px; /* 패딩 줄임 */
        display: flex;
        flex-direction: column;
        overflow: hidden; /* 넘치는 내용 숨김 */
    }
    
    .challenge_container {
        flex-direction: column;
        flex: 1;
        height: 100vh;
        max-height: 100vh;
        overflow: hidden;
    }
    
    .challenge_list {
        display: block;
        flex: 0 0 auto;
        max-height: 30vh;
        overflow-y: auto;
        border-radius: 0;
        padding: 10px;
        box-shadow: none;
        border-bottom: 1px solid var(--stamp-border-soft);
    }

    .challenge_list .challenge_list_header {
        gap: 8px;
        align-items: flex-start;
        margin-bottom: 8px;
    }

    .challenge_list .list_tabs {
        overflow-x: auto;
        white-space: nowrap;
        padding-bottom: 2px;
    }

    .challenge_list .list_tabs .tab a {
        min-height: 30px;
        padding: 5px 8px;
    }

    .challenge_list .list_content {
        max-height: calc(30vh - 58px);
        overflow-y: auto;
    }

    .challenge_list li {
        margin-bottom: 6px;
    }

    .challenge_list li a {
        padding: 10px 12px 0;
    }

    .calendar_nav h3 {
        font-size: 14px;
    }

    .calendar_nav .btn_calendar {
        font-size: 10px;
        padding: 0px;
    }
    
    /* 달력 컨테이너 높이 조정 */
    .challenge_calendar {
        flex: 1;
        display: flex;
        flex-direction: column;
        max-height: calc(100vh - 5px);
        overflow: hidden;
        background: var(--stamp-surface);
        border-radius: 0;
        padding: 10px 10px 20px 10px;
        box-shadow: none;
        backdrop-filter: blur(15px);
        -webkit-backdrop-filter: blur(15px);
        border: 0;
    }
    
    .calendar_nav {
        flex: 0 0 auto;
        padding-left: 0;
        margin-bottom: 5px;
    }
    
    .calendar_container {
        flex: 1; /* 남은 공간 모두 차지 */
        display: flex;
        flex-direction: column;
        position: relative;
        /* overflow: hidden; */
        max-height: 100%; /* 네비게이션 높이 제외 */
        margin-bottom: 0px;
    }
    
    .calendar {
        flex: 1; /* 테이블이 컨테이너 높이에 맞게 확장 */
        display: flex;
        flex-direction: column;
        height: 100%;
        max-height: 100%;
    }
    
    .calendar thead {
        flex: 0 0 auto; /* 헤더는 내용에 맞게 */
    }
    
    .calendar tbody {
        flex: 1; /* 본문이 남은 공간 차지 */
        display: flex;
        flex-direction: column;
        height: 100%;
        max-height: calc(100% - 5px); /* 헤더 높이 제외 */
    }

    .calendar thead tr {
        display: flex;
    }

    .calendar thead th {
        flex: 1;
        padding: 0;
        padding-top: 6px;
        padding-bottom: 4px;
        font-size: 0.6em;
    }
    
    .calendar tbody tr {
        flex: 1; /* 각 행이 동일한 높이로 */
        display: flex;
        /* max-height: calc(100% / 6); */
    }
    
    .calendar tbody td {
        flex: 1; /* 각 셀이 동일한 너비로 */
        height: auto; /* 높이는 행에 맞게 자동 조정 */
        min-height: 0; /* 최소 높이 제거 */
        max-height: 100%; /* 최대 높이 제한 */
        padding: 3px;
        display: flex;
        flex-direction: column;
        overflow: hidden;
    }
    
    .calendar .date {
        font-size: 11px;
        margin-bottom: 2px;
        flex: 0 0 auto;
    }
    
/* 모바일 환경에서 셀 내부 도장 스타일 */
    .cell_stamp {
        position: absolute;
        max-width: 60%;
        max-height: 60%;
        z-index: 5;
        transition: all 0.2s ease;
        filter: drop-shadow(0 1px 2px rgb(from var(--black) r g b / 0.2));
    }
    
    .cell_stamp img {
        width: 100%;
        height: 100%;
        object-fit: contain;
    }
    
    .cell_stamp:hover {
        opacity: 1 !important;
        z-index: 10 !important;
    }
    
    /* 셀 위치 상대적으로 설정 */
    .calendar tbody td {
        position: relative;
    }
    
    /* 기존 챌린지 바 숨기기 */
    .challenge_bars_container {
        display: none;
    }

    #challenge_board .calendar_event_bars,
    #challenge_board .calendar_event_bar,
    #challenge_board .event_title_bg {
        display: none;
    }

    /* 모바일 환경에서 글쓰기 버튼 스타일 */
    .challenge_m_btn_area {
        display: block;
        z-index: 10;
    }
    
    .challenge_m_btn_area .btn_create {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 30px;
        height: 30px;
        padding: 0;
        background-color: var(--btn-accent-bg);
        color: var(--btn-accent-text);
        border-radius: 6px;
        box-shadow: 0 1px 3px var(--stamp-shadow-color);
        transition: all 0.3s ease;
    }
    
    /* 네비게이션 영역 호버 시 버튼 표시 */
    .calendar_nav:hover .challenge_m_btn_area .btn_create {
        background-color: rgb(from var(--btn-accent-bg) r g b / 0.9);
        color: var(--btn-accent-text);
    }
    
    /* 버튼 자체에 호버 시 약간 더 강조 효과 */
    .challenge_m_btn_area .btn_create:hover {
        transform: scale(1.05);
    }

    .challenge_event_modal_content {
        width: calc(100% - 24px);
        max-height: 84vh;
        margin: 8vh auto;
        padding: 18px;
    }
}