/* ============================================================
   우리 반 관리 — 전용 스타일 (tools/class-manager/css/style.css)
   ============================================================ */

/* ─── CSS 변수 확장 ──────────────────────────────────────────── */
:root {
    --cm-primary:       #ffde59;   /* 삐약이 옐로우 */
    --cm-primary-dark:  #f5c800;
    --cm-green:         #a7e38a;
    --cm-green-dark:    #7ed957;
    --cm-blue:          #74b9ff;
    --cm-red:           #ff7675;
    --cm-orange:        #fdcb6e;
    --cm-purple:        #a29bfe;
    --cm-bg:            #fffdf5;   /* 따뜻한 크림 */
    --cm-card-bg:       #ffffff;
    --cm-border:        rgba(255, 222, 89, 0.4);
    --cm-shadow:        0 4px 24px rgba(255, 222, 89, 0.25);
    --cm-shadow-hover:  0 8px 32px rgba(255, 222, 89, 0.4);
    --cm-radius:        20px;
    --cm-radius-sm:     12px;
    --cm-text:          #5c5541;
    --cm-text-light:    #8c8672;
}

body {
    background-color: var(--cm-bg);
    background-image:
        radial-gradient(circle at 20% 50%, rgba(255, 222, 89, 0.12) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(167, 227, 138, 0.12) 0%, transparent 50%);
    min-height: 100vh;
}

/* ─── 인증 페이지 레이아웃 ───────────────────────────────────── */
.auth-wrapper {
    max-width: 520px;
    margin: 0 auto;
    padding: 40px 20px 80px;
}

.auth-hero {
    text-align: center;
    margin-bottom: 32px;
    animation: fadeInDown 0.6s ease;
}

.auth-icon {
    font-size: 4rem;
    margin-bottom: 12px;
    display: block;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50%       { transform: translateY(-10px); }
}

/* 로그인 실패 shake 애니메이션 */
@keyframes shake {
    0%, 100% { transform: translateX(0); }
    15%       { transform: translateX(-8px); }
    30%       { transform: translateX(8px); }
    45%       { transform: translateX(-6px); }
    60%       { transform: translateX(6px); }
    75%       { transform: translateX(-4px); }
    90%       { transform: translateX(4px); }
}

.input-error {
    animation: shake 0.5s ease !important;
    border-color: #e74c3c !important;
    box-shadow: 0 0 0 3px rgba(231, 76, 60, 0.2) !important;
}

@keyframes fadeInDown {
    from { opacity: 0; transform: translateY(-20px); }
    to   { opacity: 1; transform: translateY(0); }
}

.auth-title {
    font-size: 2rem;
    font-weight: 800;
    color: var(--cm-text);
    margin: 0 0 8px;
    background: linear-gradient(135deg, #f5c800, #7ed957);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.auth-subtitle {
    color: var(--cm-text-light);
    font-size: 1rem;
    margin: 0;
}

/* ─── 탭 ─────────────────────────────────────────────────────── */
.auth-tabs {
    display: flex;
    background: rgba(255,255,255,0.7);
    border-radius: var(--cm-radius);
    padding: 6px;
    gap: 6px;
    margin-bottom: 20px;
    border: 1px solid var(--cm-border);
    backdrop-filter: blur(10px);
}

.auth-tab {
    flex: 1;
    padding: 12px;
    border: none;
    border-radius: calc(var(--cm-radius) - 4px);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.25s ease;
    background: transparent;
    color: var(--cm-text-light);
    font-family: inherit;
}

.auth-tab.active {
    background: var(--cm-primary);
    color: var(--cm-text);
    box-shadow: 0 2px 12px rgba(245, 200, 0, 0.35);
}

.auth-tab:not(.active):hover {
    background: rgba(255, 222, 89, 0.2);
    color: var(--cm-text);
}

/* ─── 카드 ───────────────────────────────────────────────────── */
.auth-card {
    background: rgba(255,255,255,0.85);
    border-radius: var(--cm-radius);
    padding: 32px;
    border: 1px solid var(--cm-border);
    box-shadow: var(--cm-shadow);
    backdrop-filter: blur(10px);
    animation: fadeIn 0.4s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ─── 폼 요소 ────────────────────────────────────────────────── */
.form-group {
    margin-bottom: 20px;
    flex: 1;
}

.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--cm-text);
    margin-bottom: 8px;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px 16px;
    border: 1.5px solid var(--cm-border);
    border-radius: var(--cm-radius-sm);
    font-size: 1rem;
    font-family: inherit;
    color: var(--cm-text);
    background: white;
    transition: border-color 0.2s, box-shadow 0.2s;
    box-sizing: border-box;
    outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--cm-primary-dark);
    box-shadow: 0 0 0 3px rgba(245, 200, 0, 0.2);
}

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

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.req {
    color: var(--cm-red);
}

/* ─── 정보 박스 ──────────────────────────────────────────────── */
.info-box {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    background: rgba(167, 227, 138, 0.15);
    border: 1px solid rgba(167, 227, 138, 0.5);
    border-radius: var(--cm-radius-sm);
    padding: 12px 16px;
    margin-bottom: 20px;
}

.info-icon { font-size: 1.1rem; flex-shrink: 0; margin-top: 2px; }

.info-box p {
    font-size: 0.85rem;
    color: var(--cm-text);
    margin: 0;
    line-height: 1.5;
}

/* ─── 동의 체크박스 ──────────────────────────────────────────── */
.consent-label {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 24px;
    cursor: pointer;
    font-size: 0.875rem;
    color: var(--cm-text);
    line-height: 1.5;
}

.consent-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
    margin-top: 2px;
    accent-color: var(--cm-primary-dark);
    cursor: pointer;
}

/* ─── 버튼 ───────────────────────────────────────────────────── */
.btn-primary {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, var(--cm-primary), var(--cm-primary-dark));
    color: var(--cm-text);
    font-size: 1rem;
    font-weight: 700;
    font-family: inherit;
    border: none;
    border-radius: var(--cm-radius-sm);
    cursor: pointer;
    transition: all 0.25s ease;
    box-shadow: 0 4px 16px rgba(245, 200, 0, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(245, 200, 0, 0.45);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.btn-secondary {
    padding: 12px 24px;
    background: white;
    color: var(--cm-text);
    font-size: 0.95rem;
    font-weight: 600;
    font-family: inherit;
    border: 1.5px solid var(--cm-border);
    border-radius: var(--cm-radius-sm);
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-secondary:hover {
    background: var(--off-white);
}

/* ─── 대시보드 헤더 ──────────────────────────────────────────── */
.header-spacer { flex: 1; }

.dashboard-header-info {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.875rem;
}

.class-badge {
    background: linear-gradient(135deg, var(--cm-primary), var(--cm-primary-dark));
    color: var(--cm-text);
    padding: 4px 14px;
    border-radius: 20px;
    font-weight: 700;
    font-size: 0.85rem;
    white-space: nowrap;
}

.teacher-name {
    color: var(--cm-text);
    font-weight: 600;
    white-space: nowrap;
}

.header-date {
    color: var(--cm-text-light);
    font-size: 0.8rem;
    white-space: nowrap;
}

@media (max-width: 600px) {
    .header-date { display: none; }
    .teacher-name { display: none; }
}

/* ─── 로그아웃 버튼 ──────────────────────────────────────────── */
.btn-logout {
    padding: 8px 16px;
    background: white;
    color: var(--cm-text-light);
    font-size: 0.8rem;
    font-weight: 600;
    font-family: inherit;
    border: 1.5px solid var(--cm-border);
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
    flex-shrink: 0;
}

.btn-logout:hover {
    background: var(--cm-red);
    color: white;
    border-color: var(--cm-red);
}

/* ─── 출석 요약 배너 ─────────────────────────────────────────── */
.attendance-banner {
    background: rgba(255,255,255,0.85);
    border-bottom: 1px solid var(--cm-border);
    backdrop-filter: blur(10px);
    padding: 14px 0;
}

.banner-stats {
    display: flex;
    align-items: center;
    gap: 0;
}

.stat-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 8px 12px;
    border-radius: var(--cm-radius-sm);
    transition: background 0.2s;
}

.stat-num {
    font-size: 1.8rem;
    font-weight: 800;
    line-height: 1;
    margin-bottom: 4px;
}

.stat-label {
    font-size: 0.75rem;
    font-weight: 600;
    opacity: 0.8;
}

.stat-present .stat-num { color: var(--cm-green-dark); }
.stat-absent  .stat-num { color: var(--cm-red); }
.stat-late    .stat-num { color: var(--cm-orange); }
.stat-total   .stat-num { color: var(--cm-text-light); }

/* ─── 탭 내비게이션 ──────────────────────────────────────────── */
.tab-nav-wrapper {
    background: rgba(255,255,255,0.7);
    border-bottom: 1px solid var(--cm-border);
    position: sticky;
    top: 70px;
    z-index: 100;
    backdrop-filter: blur(10px);
}

.tab-nav {
    display: flex;
    gap: 4px;
    padding: 10px 0;
}

.tab-btn {
    padding: 10px 24px;
    border: none;
    border-radius: var(--cm-radius-sm);
    font-size: 0.9rem;
    font-weight: 700;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.2s ease;
    background: transparent;
    color: var(--cm-text-light);
}

.tab-btn.active {
    background: var(--cm-primary);
    color: var(--cm-text);
    box-shadow: 0 2px 10px rgba(245, 200, 0, 0.3);
}

.tab-btn:not(.active):hover {
    background: rgba(255, 222, 89, 0.2);
    color: var(--cm-text);
}

@media (max-width: 500px) {
    .tab-btn { padding: 10px 14px; font-size: 0.8rem; }
}

/* ─── 패널 헤더 ──────────────────────────────────────────────── */
.panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
    gap: 12px;
}

.panel-header h2 {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--cm-text);
    margin: 0;
}

.today-date-label {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--cm-text-light);
}

/* ─── 저장 버튼 / 추가 버튼 ──────────────────────────────────── */
.btn-save {
    padding: 12px 24px;
    background: linear-gradient(135deg, var(--cm-green), var(--cm-green-dark));
    color: white;
    font-size: 0.95rem;
    font-weight: 700;
    font-family: inherit;
    border: none;
    border-radius: var(--cm-radius-sm);
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 4px 12px rgba(126, 217, 87, 0.3);
    white-space: nowrap;
}

.btn-save:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(126, 217, 87, 0.5);
}

.btn-add {
    padding: 12px 24px;
    background: linear-gradient(135deg, var(--cm-primary), var(--cm-primary-dark));
    color: var(--cm-text);
    font-size: 0.95rem;
    font-weight: 700;
    font-family: inherit;
    border: none;
    border-radius: var(--cm-radius-sm);
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 4px 12px rgba(245, 200, 0, 0.3);
    white-space: nowrap;
}

.btn-add:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(245, 200, 0, 0.5);
}

/* ─── 출석 범례 ──────────────────────────────────────────────── */
.attendance-legend {
    display: flex;
    gap: 12px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.legend-item {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--cm-text-light);
    padding: 4px 10px;
    border-radius: 20px;
    background: rgba(255,255,255,0.7);
    border: 1px solid var(--cm-border);
}

/* ─── 출석 목록 ──────────────────────────────────────────────── */
.attendance-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.attendance-row {
    display: flex;
    align-items: center;
    background: rgba(255,255,255,0.85);
    border-radius: var(--cm-radius-sm);
    border: 1.5px solid var(--cm-border);
    padding: 16px 20px;
    gap: 16px;
    transition: all 0.2s ease;
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}

.attendance-row:hover {
    border-color: var(--cm-primary-dark);
    box-shadow: 0 4px 16px rgba(245, 200, 0, 0.15);
}

.student-info {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 12px;
}

.student-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--cm-primary), var(--cm-green));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.student-display-name {
    font-size: 1rem;
    font-weight: 700;
    color: var(--cm-text);
}

.attendance-btns {
    display: flex;
    gap: 8px;
}

.att-btn {
    padding: 8px 16px;
    border: 2px solid transparent;
    border-radius: var(--cm-radius-sm);
    font-size: 0.85rem;
    font-weight: 700;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.2s ease;
    background: rgba(0,0,0,0.04);
    color: var(--cm-text-light);
}

.att-btn:hover {
    transform: translateY(-1px);
}

.att-btn.present.selected {
    background: rgba(126, 217, 87, 0.2);
    border-color: var(--cm-green-dark);
    color: #3d8b2e;
}

.att-btn.late.selected {
    background: rgba(253, 203, 110, 0.3);
    border-color: #e0a000;
    color: #8a6200;
}

.att-btn.absent.selected {
    background: rgba(255, 118, 117, 0.2);
    border-color: var(--cm-red);
    color: #c0392b;
}

.att-btn.present:hover { border-color: var(--cm-green-dark); }
.att-btn.late:hover    { border-color: #e0a000; }
.att-btn.absent:hover  { border-color: var(--cm-red); }

@media (max-width: 500px) {
    .attendance-row { padding: 12px 14px; gap: 10px; }
    .att-btn { padding: 8px 10px; font-size: 0.78rem; }
}

/* ─── 원아 목록 ──────────────────────────────────────────────── */
.students-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 16px;
}

.student-card {
    background: rgba(255,255,255,0.85);
    border-radius: var(--cm-radius);
    border: 1.5px solid var(--cm-border);
    padding: 20px;
    transition: all 0.2s ease;
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
    position: relative;
    overflow: hidden;
}

.student-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(to bottom, var(--cm-primary), var(--cm-green));
}

.student-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--cm-shadow-hover);
    border-color: var(--cm-primary-dark);
}

.student-card-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.student-card-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--cm-primary), var(--cm-green));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    flex-shrink: 0;
}

.student-card-name {
    font-size: 1.1rem;
    font-weight: 800;
    color: var(--cm-text);
}

.student-card-birth {
    font-size: 0.8rem;
    color: var(--cm-text-light);
    margin-top: 2px;
}

.student-card-notes {
    font-size: 0.85rem;
    color: var(--cm-text-light);
    border-top: 1px solid var(--cm-border);
    padding-top: 10px;
    margin-top: 10px;
    line-height: 1.5;
    white-space: pre-wrap;
}

.student-card-actions {
    display: flex;
    gap: 8px;
    margin-top: 14px;
}

.btn-edit, .btn-delete {
    flex: 1;
    padding: 8px;
    font-size: 0.8rem;
    font-weight: 700;
    font-family: inherit;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-edit {
    background: rgba(255, 222, 89, 0.3);
    color: var(--cm-text);
}

.btn-edit:hover {
    background: var(--cm-primary);
}

.btn-delete {
    background: rgba(255, 118, 117, 0.15);
    color: var(--cm-red);
}

.btn-delete:hover {
    background: var(--cm-red);
    color: white;
}

/* ─── 생일 달력 ──────────────────────────────────────────────── */
.birthday-section {
    margin-bottom: 40px;
}

.birthday-month-header {
    margin-bottom: 16px;
}

.month-label {
    font-size: 1.1rem;
    font-weight: 800;
    color: var(--cm-text);
    background: linear-gradient(135deg, var(--cm-primary), var(--cm-green));
    padding: 6px 20px;
    border-radius: 20px;
    display: inline-block;
}

.birthday-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 16px;
}

.birthday-card {
    background: rgba(255,255,255,0.9);
    border-radius: var(--cm-radius);
    border: 1.5px solid var(--cm-border);
    padding: 20px 16px;
    text-align: center;
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
    transition: all 0.2s ease;
    position: relative;
    overflow: hidden;
}

.birthday-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--cm-shadow-hover);
}

.birthday-card.today-birthday {
    border-color: var(--cm-primary-dark);
    background: rgba(255, 222, 89, 0.1);
}

.birthday-card.today-birthday::after {
    content: '🎉 오늘!';
    position: absolute;
    top: 8px;
    right: 8px;
    font-size: 0.7rem;
    font-weight: 700;
    background: var(--cm-primary);
    color: var(--cm-text);
    padding: 2px 8px;
    border-radius: 10px;
}

.birthday-emoji {
    font-size: 2.5rem;
    display: block;
    margin-bottom: 8px;
}

.birthday-name {
    font-size: 1.05rem;
    font-weight: 800;
    color: var(--cm-text);
    margin-bottom: 6px;
}

.birthday-date-text {
    font-size: 0.85rem;
    color: var(--cm-text-light);
    margin-bottom: 10px;
}

.dday-badge {
    display: inline-block;
    padding: 4px 14px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--cm-purple), #6c5ce7);
    color: white;
}

.dday-badge.dday-today {
    background: linear-gradient(135deg, var(--cm-primary), var(--cm-primary-dark));
    color: var(--cm-text);
}

/* ─── 모달 ───────────────────────────────────────────────────── */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(92, 85, 65, 0.5);
    backdrop-filter: blur(4px);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    animation: fadeIn 0.2s ease;
}

.modal-card {
    background: white;
    border-radius: var(--cm-radius);
    width: 100%;
    max-width: 480px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.2);
    animation: slideUp 0.3s ease;
    overflow: hidden;
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(30px) scale(0.95); }
    to   { opacity: 1; transform: translateY(0) scale(1); }
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    background: linear-gradient(135deg, var(--cm-primary), var(--cm-green));
}

.modal-header h3 {
    margin: 0;
    font-size: 1.1rem;
    font-weight: 800;
    color: var(--cm-text);
}

.modal-close {
    background: rgba(255,255,255,0.5);
    border: none;
    border-radius: 50%;
    width: 32px;
    height: 32px;
    font-size: 1rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s;
    color: var(--cm-text);
}

.modal-close:hover { background: rgba(255,255,255,0.8); }

.modal-card form {
    padding: 24px;
}

.modal-actions {
    display: flex;
    gap: 12px;
    margin-top: 8px;
}

.modal-actions .btn-primary {
    flex: 1;
}

.modal-actions .btn-secondary {
    flex: 1;
}

/* ─── 로딩 ───────────────────────────────────────────────────── */
.loading-placeholder {
    text-align: center;
    padding: 60px 20px;
    color: var(--cm-text-light);
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 4px solid rgba(255, 222, 89, 0.3);
    border-top-color: var(--cm-primary-dark);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto 16px;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ─── 빈 상태 ────────────────────────────────────────────────── */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--cm-text-light);
}

.empty-state .empty-icon {
    font-size: 4rem;
    margin-bottom: 16px;
    display: block;
}

.empty-state p {
    font-size: 1rem;
    margin: 0;
}

/* ─── 토스트 알림 (tools-shared.css 확장) ────────────────────── */
.toast-notification {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    background: rgba(92, 85, 65, 0.92);
    color: white;
    padding: 12px 28px;
    border-radius: 30px;
    font-size: 0.95rem;
    font-weight: 600;
    pointer-events: none;
    opacity: 0;
    transition: all 0.25s ease;
    z-index: 9999;
    white-space: nowrap;
    box-shadow: 0 8px 24px rgba(0,0,0,0.2);
}

.toast-notification.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* ─── 반응형 ─────────────────────────────────────────────────── */
@media (max-width: 600px) {
    .auth-wrapper { padding: 24px 16px 60px; }
    .auth-card { padding: 24px 20px; }
    .form-row { grid-template-columns: 1fr; gap: 0; }
    .students-list { grid-template-columns: 1fr; }
    .birthday-cards { grid-template-columns: repeat(2, 1fr); }
    .panel-header { flex-wrap: wrap; }
    .btn-save, .btn-add { padding: 10px 16px; font-size: 0.85rem; }
}

@media (max-width: 360px) {
    .birthday-cards { grid-template-columns: 1fr; }
}