/* ===========================
   전역 스타일 및 변수
   =========================== */
:root {
    --primary-color: #FF6B6B;
    --secondary-color: #4ECDC4;
    --accent-color: #FFE66D;
    --success-color: #51CF66;
    --warning-color: #FFA94D;
    --danger-color: #FF6B6B;
    --text-primary: #2C3E50;
    --text-secondary: #7F8C8D;
    --bg-primary: #F8F9FA;
    --bg-secondary: #FFFFFF;
    --border-color: #E9ECEF;
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.15);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===========================
   헤더
   =========================== */
.app-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, #FF8787 100%);
    color: white;
    padding: 1rem 0;
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    font-weight: 700;
}

.logo-icon {
    width: 32px;
    height: 32px;
    color: white;
}

.header-actions {
    display: flex;
    gap: 0.5rem;
}

.icon-btn {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: white;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.icon-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.05);
}

.icon-btn svg {
    width: 20px;
    height: 20px;
}

/* ===========================
   메인 레이아웃
   =========================== */
.app-main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

section {
    margin-bottom: 2rem;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.section-header h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* ===========================
   아이 선택 탭
   =========================== */
.child-selector {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: 1rem;
    box-shadow: var(--shadow-sm);
}

.child-tabs {
    display: flex;
    gap: 0.5rem;
    overflow-x: auto;
    padding-bottom: 0.5rem;
}

.child-tabs::-webkit-scrollbar {
    height: 4px;
}

.child-tabs::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 2px;
}

.child-tab {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.25rem;
    background: var(--bg-primary);
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
    font-size: 0.95rem;
    font-weight: 500;
}

.child-tab:hover {
    background: #F1F3F5;
}

.child-tab.active {
    background: linear-gradient(135deg, var(--primary-color), #FF8787);
    color: white;
    border-color: var(--primary-color);
    position: relative;
}

.child-edit-btn {
    position: absolute;
    top: 4px;
    right: 4px;
    width: 24px;
    height: 24px;
    background: rgba(255, 255, 255, 0.3);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 4px;
    transition: var(--transition);
}

.child-edit-btn:hover {
    background: rgba(255, 255, 255, 0.5);
    transform: scale(1.1);
}

.child-edit-btn svg {
    width: 14px;
    height: 14px;
    stroke: white;
}

.child-avatar {
    font-size: 1.5rem;
}

.child-tab-add {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.25rem;
    background: transparent;
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    color: var(--text-secondary);
    transition: var(--transition);
    white-space: nowrap;
}

.child-tab-add:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    background: rgba(255, 107, 107, 0.05);
}

.child-tab-add svg {
    width: 20px;
    height: 20px;
}

/* ===========================
   상태 카드
   =========================== */
.status-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.status-card {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: var(--transition);
}

.status-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.card-icon {
    font-size: 2.5rem;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(255, 107, 107, 0.1), rgba(255, 107, 107, 0.05));
    border-radius: var(--radius-md);
}

.temp-card .card-icon {
    background: linear-gradient(135deg, rgba(255, 107, 107, 0.15), rgba(255, 107, 107, 0.05));
}

.med-card .card-icon {
    background: linear-gradient(135deg, rgba(78, 205, 196, 0.15), rgba(78, 205, 196, 0.05));
}

.alert-card .card-icon {
    background: linear-gradient(135deg, rgba(255, 169, 77, 0.15), rgba(255, 169, 77, 0.05));
}

.card-content {
    flex: 1;
}

.card-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
}

.card-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.card-time {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* ===========================
   그래프 섹션
   =========================== */
.chart-section {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
}

.time-range-select {
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 0.875rem;
    cursor: pointer;
    transition: var(--transition);
}

.time-range-select:hover {
    border-color: var(--primary-color);
}

.chart-container {
    position: relative;
    height: 350px;
    margin: 1.5rem 0;
}

.chart-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.legend-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.legend-marker {
    font-size: 1.2rem;
}

/* ===========================
   빠른 액션 버튼
   =========================== */
.quick-actions {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.action-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    padding: 1.25rem;
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.action-btn svg {
    width: 24px;
    height: 24px;
}

.action-btn.primary {
    background: linear-gradient(135deg, var(--primary-color), #FF8787);
    color: white;
}

.action-btn.primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.action-btn.secondary {
    background: linear-gradient(135deg, var(--secondary-color), #5DD5CD);
    color: white;
}

.action-btn.secondary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.action-btn.tertiary {
    background: linear-gradient(135deg, var(--accent-color), #FFE88A);
    color: var(--text-primary);
}

.action-btn.tertiary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ===========================
   타임라인
   =========================== */
.timeline-section {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
}

.filter-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.875rem;
    cursor: pointer;
    transition: var(--transition);
}

.filter-btn:hover {
    background: #F1F3F5;
    border-color: var(--primary-color);
}

.filter-btn svg {
    width: 16px;
    height: 16px;
}

.timeline {
    position: relative;
    padding-left: 2rem;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0.5rem;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--border-color);
}

.timeline-item {
    position: relative;
    padding: 1rem 0 1rem 1.5rem;
    margin-bottom: 1rem;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -1.4rem;
    top: 1.5rem;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--bg-secondary);
    border: 3px solid var(--primary-color);
}

.timeline-item.temp::before {
    border-color: var(--danger-color);
}

.timeline-item.med::before {
    border-color: var(--secondary-color);
}

.timeline-item.note::before {
    border-color: var(--accent-color);
}

.timeline-content {
    background: var(--bg-primary);
    padding: 1rem;
    border-radius: var(--radius-md);
    border-left: 3px solid var(--primary-color);
    transition: var(--transition);
}

.timeline-item.temp .timeline-content {
    border-left-color: var(--danger-color);
}

.timeline-item.med .timeline-content {
    border-left-color: var(--secondary-color);
}

.timeline-item.note .timeline-content {
    border-left-color: var(--accent-color);
}

.timeline-content:hover {
    background: #F1F3F5;
}

.timeline-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 0.5rem;
}

.timeline-type {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

.timeline-type-icon {
    font-size: 1.25rem;
}

.timeline-time {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.timeline-details {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-top: 0.5rem;
}

.timeline-value {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0.5rem 0;
}

.timeline-note {
    margin-top: 0.5rem;
    padding: 0.75rem;
    background: var(--bg-secondary);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
}

.timeline-actions {
    display: flex;
    gap: 0.5rem;
    margin-top: 0.75rem;
}

.timeline-btn {
    padding: 0.25rem 0.75rem;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
}

.timeline-btn:hover {
    background: var(--bg-secondary);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.empty-state {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--text-secondary);
}

.empty-state svg {
    width: 64px;
    height: 64px;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.empty-state p {
    font-size: 1rem;
    margin-bottom: 0.5rem;
}

.empty-state-sub {
    font-size: 0.875rem;
    opacity: 0.7;
}

/* ===========================
   모달
   =========================== */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    animation: fadeIn 0.3s ease;
}

.modal.active {
    display: flex;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.modal-content {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    max-width: 500px;
    width: 100%;
    max-height: 90vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-lg);
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from {
        transform: translateY(50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    font-size: 2rem;
    color: var(--text-secondary);
    cursor: pointer;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: var(--transition);
}

.modal-close:hover {
    background: var(--bg-primary);
    color: var(--text-primary);
}

.modal-body {
    padding: 1.5rem;
    overflow-y: auto;
}

.modal-footer {
    padding: 1.5rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
}

/* ===========================
   폼 요소
   =========================== */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-primary);
    font-size: 0.9rem;
}

.form-control {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-family: inherit;
    transition: var(--transition);
    background: var(--bg-secondary);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(255, 107, 107, 0.1);
}

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

/* 특수 입력 그룹 */
.temp-input-group {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.temp-quick-btns {
    display: flex;
    gap: 0.5rem;
}

.temp-quick-btn {
    flex: 1;
    padding: 0.5rem;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
}

.temp-quick-btn:hover {
    background: var(--bg-secondary);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.dose-input-group {
    display: flex;
    gap: 0.5rem;
}

.dose-input-group input {
    flex: 1;
}

.unit-select {
    width: 80px;
}

.dose-calculator {
    margin: 1rem 0;
}

.calculator-btn {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem;
    background: linear-gradient(135deg, var(--secondary-color), #5DD5CD);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
}

.calculator-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.calculator-btn svg {
    width: 20px;
    height: 20px;
}

/* 증상 칩 */
.symptom-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.chip {
    padding: 0.5rem 1rem;
    background: var(--bg-primary);
    border: 2px solid var(--border-color);
    border-radius: 20px;
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.875rem;
}

.chip:hover {
    border-color: var(--primary-color);
    background: rgba(255, 107, 107, 0.05);
}

.chip.active {
    background: linear-gradient(135deg, var(--primary-color), #FF8787);
    color: white;
    border-color: var(--primary-color);
}

/* 아바타 선택 */
.avatar-selector {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.avatar-option {
    width: 60px;
    height: 60px;
    font-size: 2rem;
    background: var(--bg-primary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.avatar-option:hover {
    transform: scale(1.05);
    border-color: var(--primary-color);
}

.avatar-option.active {
    border-color: var(--primary-color);
    background: rgba(255, 107, 107, 0.1);
}

/* 버튼 */
.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), #FF8787);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: var(--bg-primary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: #E9ECEF;
}

.btn.full-width {
    width: 100%;
}

/* 용량 계산 결과 */
.dose-result {
    margin-top: 1.5rem;
    padding: 1.5rem;
    background: linear-gradient(135deg, rgba(81, 207, 102, 0.1), rgba(81, 207, 102, 0.05));
    border-radius: var(--radius-md);
    border: 2px solid var(--success-color);
}

.result-header {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.result-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--success-color);
    margin-bottom: 1rem;
}

.result-info {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.result-info p {
    margin: 0.5rem 0;
}

.warning-text {
    color: var(--warning-color);
    font-weight: 500;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

/* ===========================
   반응형 디자인
   =========================== */
@media (max-width: 768px) {
    .app-main {
        padding: 1.5rem 1rem;
    }

    .status-cards {
        grid-template-columns: 1fr;
    }

    .quick-actions {
        grid-template-columns: 1fr;
    }

    .chart-container {
        height: 300px;
    }

    .child-tabs {
        padding-bottom: 0.75rem;
    }

    .modal-content {
        margin: 1rem;
    }

    .logo-text {
        font-size: 1.25rem;
    }

    .section-header h2 {
        font-size: 1.25rem;
    }

    .card-value {
        font-size: 1.5rem;
    }
}

@media (max-width: 480px) {
    .header-container {
        padding: 0 1rem;
    }

    .app-main {
        padding: 1rem 0.75rem;
    }

    .status-card {
        padding: 1rem;
    }

    .card-icon {
        width: 50px;
        height: 50px;
        font-size: 2rem;
    }

    .chart-container {
        height: 250px;
    }

    .avatar-selector {
        justify-content: center;
    }

    .timeline {
        padding-left: 1.5rem;
    }

    .timeline-item {
        padding-left: 1rem;
    }
}

/* ===========================
   프린트 스타일
   =========================== */
@media print {
    .app-header,
    .quick-actions,
    .modal,
    .timeline-actions,
    .header-actions,
    .child-tab-add,
    .filter-btn {
        display: none !important;
    }

    body {
        background: white;
    }

    .status-card,
    .chart-section,
    .timeline-section {
        box-shadow: none;
        border: 1px solid var(--border-color);
        page-break-inside: avoid;
    }
}

/* ===========================
   다크모드 지원 (추후 확장)
   =========================== */
@media (prefers-color-scheme: dark) {
    /* 다크모드 스타일은 추후 추가 가능 */
}

/* ===========================
   애니메이션
   =========================== */
@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

.loading {
    animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

/* ===========================
   접근성
   =========================== */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* 포커스 표시 개선 */
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* ===== 로그인 화면 ===== */
.login-screen {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10000;
  padding: 20px;
}

.login-container {
  background: white;
  border-radius: 24px;
  padding: 40px 32px;
  max-width: 440px;
  width: 100%;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  animation: slideUp 0.4s ease-out;
}

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

.login-header {
  text-align: center;
  margin-bottom: 32px;
}

.login-logo {
  width: 80px;
  height: 80px;
  margin: 0 auto 16px;
  filter: drop-shadow(0 4px 12px rgba(255, 107, 107, 0.3));
}

.login-title {
  font-size: 32px;
  font-weight: 700;
  color: #2d3748;
  margin: 0 0 8px 0;
}

.login-subtitle {
  font-size: 15px;
  color: #718096;
  margin: 0;
}

.login-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 24px;
  background: #f7fafc;
  border-radius: 12px;
  padding: 4px;
}

.login-tab {
  flex: 1;
  padding: 12px 16px;
  background: transparent;
  border: none;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 500;
  color: #718096;
  cursor: pointer;
  transition: all 0.2s;
}

.login-tab.active {
  background: white;
  color: #667eea;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.login-tab-content {
  display: none;
}

.login-tab-content.active {
  display: block;
  animation: fadeIn 0.3s ease-out;
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: #2d3748;
  margin-bottom: 8px;
}

.form-group input {
  width: 100%;
  padding: 14px 16px;
  border: 2px solid #e2e8f0;
  border-radius: 12px;
  font-size: 15px;
  transition: all 0.2s;
  box-sizing: border-box;
}

.form-group input:focus {
  outline: none;
  border-color: #667eea;
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-group small {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  color: #718096;
}

.btn-primary {
  width: 100%;
  padding: 16px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  border: none;
  border-radius: 12px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(102, 126, 234, 0.4);
}

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

.login-help {
  margin-top: 16px;
  text-align: center;
  font-size: 13px;
  color: #718096;
  line-height: 1.6;
}

.login-features {
  margin-top: 24px;
  padding-top: 24px;
  border-top: 1px solid #e2e8f0;
}

.login-features p {
  margin: 8px 0;
  font-size: 14px;
  color: #4a5568;
}

/* 로딩 상태 */
.btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* 알림 메시지 */
.alert {
  padding: 12px 16px;
  border-radius: 8px;
  margin-bottom: 16px;
  font-size: 14px;
}

.alert-success {
  background: #d4edda;
  color: #155724;
  border: 1px solid #c3e6cb;
}

.alert-error {
  background: #f8d7da;
  color: #721c24;
  border: 1px solid #f5c6cb;
}