/* ============================================
   학습자 인증 페이지 공통 스타일

   [통합 파일]
   - 로그인 페이지 (login.css에서 이동)
   - 아이디 찾기 페이지
   - 비밀번호 찾기 페이지
   - 최초 본인인증 페이지

   [특징]
   - Bootstrap form-floating 스타일
   - 둥근 디자인, 그림자 효과
   - 반응형 디자인

   [변경 이력]
   - 2025-01-21: login.css 통합 (중복 제거)
   ============================================ */

:root {
    /* 브랜드 색상 - HTML에서 동적으로 주입됨 */
    --login-primary-color: #3b82f6;
    --login-primary-hover: #2563eb;

    /* 색상 팔레트 */
    --color-text: #1e293b;
    --color-text-light: #64748b;
    --color-border: #e2e8f0;
    --color-bg: #f8fafc;
    --color-white: #ffffff;

    /* 상태 색상 */
    --color-error: #ef4444;
    --color-error-bg: #fee2e2;
    --color-info: #3b82f6;
    --color-info-bg: #dbeafe;
    --color-warning: #f59e0b;
    --color-warning-bg: #fef3c7;

    /* 그림자 */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
}

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

body {
    font-family: 'Noto Sans KR', sans-serif;
    background: #f5f5f5;
    color: var(--color-text);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Layout */
.login-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem 1rem;
}

.login-container {
    width: 100%;
    max-width: 450px;
}

.login-card {
    background: var(--color-white);
    border-radius: 1rem;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15),
                0 10px 30px rgba(0, 0, 0, 0.1),
                0 4px 10px rgba(0, 0, 0, 0.08);
    overflow: hidden;
}

/* Header */
.login-header {
    padding: 2.5rem 2rem 2rem;
    text-align: center;
}

.logo-container {
    margin-bottom: 0.5rem;
}

.login-logo {
    max-width: 200px;
    height: auto;
}

/* Body */
.login-body {
    padding: 0 2rem 2.5rem;
}

/* Alert */
.alert {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem;
    margin-bottom: 1.5rem;
    border-radius: 0.75rem;
    border: 1px solid;
    position: relative;
    animation: slideDown 0.3s ease-out;
}

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

.alert i:first-child {
    flex-shrink: 0;
    font-size: 1.25rem;
}

.alert div {
    flex: 1;
}

.alert strong {
    font-weight: 600;
}

.alert-close {
    position: absolute;
    top: 0.75rem;
    right: 0.75rem;
    background: transparent;
    border: none;
    color: inherit;
    opacity: 0.5;
    cursor: pointer;
    padding: 0.25rem;
    line-height: 1;
    transition: opacity 0.2s;
}

.alert-close:hover {
    opacity: 1;
}

.alert-error {
    background: var(--color-error-bg);
    border-color: var(--color-error);
    color: var(--color-error);
}

.alert-info {
    background: var(--color-info-bg);
    border-color: var(--color-info);
    color: var(--color-info);
}

/* Caps Lock Warning */
.caps-lock-warning {
    background: var(--color-warning-bg);
    border: 1px solid var(--color-warning);
    color: var(--color-warning);
    border-radius: 0.75rem;
    padding: 1rem;
    margin-bottom: 1.5rem;
    animation: shake 0.5s ease-in-out;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

.caps-lock-content {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
}

.caps-lock-content i {
    flex-shrink: 0;
    font-size: 1.25rem;
    margin-top: 0.125rem;
}

.caps-lock-text {
    font-size: 0.875rem;
    margin-top: 0.25rem;
}

/* Form Floating (Bootstrap 스타일) */
.form-floating {
    position: relative;
    margin-bottom: 1.25rem;
}

.form-floating > .form-control {
    height: calc(3.5rem + 2px);
    line-height: 1.25;
    padding: 1rem 0.875rem 0rem 0.875rem;
}

.form-floating > label {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    padding: 1rem 0.875rem;
    pointer-events: none;
    border: 1px solid transparent;
    transform-origin: 0 0;
    transition: opacity 0.1s ease-in-out, transform 0.1s ease-in-out;
    color: var(--color-text-light);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.form-floating > .form-control:focus ~ label,
.form-floating > .form-control:not(:placeholder-shown) ~ label,
.form-floating > .form-control:-webkit-autofill ~ label {
    opacity: 0.65;
    transform: scale(0.85) translateY(-0.5rem) translateX(0.15rem);
}

.form-control {
    width: 100%;
    padding: 0.625rem 0.875rem;
    font-size: 0.9rem;
    font-weight: 400;
    line-height: 1.5;
    color: var(--color-text);
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: 0.75rem;
    transition: all 0.2s ease;
    outline: none;
}

.form-control:focus {
    border-color: var(--login-primary-color);
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1);
}

.form-control::placeholder {
    color: transparent;
}

/* Input with Icon */
.input-group-custom {
    position: relative;
}

.form-control-icon {
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-light);
    transition: color 0.2s;
    z-index: 10;
}

.form-control-icon:hover {
    color: var(--color-text);
}

/* Login Options */
.login-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.login-error-link {
    font-size: 0.875rem;
    color: var(--color-text-light);
    text-decoration: none;
    transition: color 0.2s;
}

.login-error-link:hover {
    color: var(--login-primary-color);
}

.form-check {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.form-check-input {
    width: 1.125rem;
    height: 1.125rem;
    margin: 0;
    cursor: pointer;
    border: 2px solid var(--color-border);
    border-radius: 0.25rem;
    transition: all 0.2s;
}

.form-check-input:checked {
    background-color: var(--login-primary-color);
    border-color: var(--login-primary-color);
}

.form-check-input:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-check-label {
    font-size: 0.875rem;
    color: var(--color-text);
    cursor: pointer;
    user-select: none;
}

/* Button */
.btn-primary {
    width: 100%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.875rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-white);
    background: var(--login-primary-color);
    border: none;
    border-radius: 0.75rem;
    cursor: pointer;
    transition: all 0.2s ease;
    outline: none;
    box-shadow: 0 4px 6px -1px rgb(59 130 246 / 0.3);
}

.btn-primary:hover:not(:disabled) {
    background: var(--login-primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 12px -2px rgb(59 130 246 / 0.4);
}

.btn-primary:active:not(:disabled) {
    transform: translateY(0);
    box-shadow: 0 2px 4px -1px rgb(59 130 246 / 0.3);
}

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

.login-btn {
    margin-top: 0.5rem;
}

/* Links */
.login-links {
    text-align: center;
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--color-border);
}

.login-link {
    color: var(--color-text);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    transition: color 0.2s;
}

.login-link:hover {
    color: var(--login-primary-color);
}

.login-link-divider {
    margin: 0 0.75rem;
    color: var(--color-border);
}

/* System Info */
.system-info {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--color-border);
    text-align: center;
    font-size: 0.875rem;
    color: var(--color-text-light);
}

.system-info p {
    margin: 0.5rem 0;
    line-height: 1.8;
}

.system-info strong {
    color: var(--color-text);
    font-weight: 600;
}

/* Copyright */
.copyright {
    margin-top: 2rem;
    padding: 1rem;
    text-align: center;
    font-size: 0.75rem;
    color: var(--color-text-light);
}

.copyright strong {
    font-weight: 600;
    color: var(--color-text);
}

/* Spinner */
.spinner {
    display: inline-block;
    width: 1rem;
    height: 1rem;
    margin-right: 0.5rem;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: var(--color-white);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

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

/* Responsive */
@media (max-width: 640px) {
    .login-wrapper {
        padding: 1rem;
    }

    .login-container {
        max-width: 100%;
    }

    .login-header {
        padding: 2rem 1.5rem 1.5rem;
    }

    .login-body {
        padding: 0 1.5rem 2rem;
    }

    .login-logo {
        max-width: 160px;
    }

    .login-options {
        flex-direction: row;
        justify-content: space-between;
    }

    .form-floating > .form-control {
        height: calc(3rem + 2px);
    }
}

/* Focus visible - accessibility */
.btn-primary:focus-visible,
.form-control:focus-visible,
.form-check-input:focus-visible {
    outline: 2px solid var(--login-primary-color);
    outline-offset: 2px;
}

/* ============================================
   아이디/비밀번호 찾기 페이지 전용 스타일
   ============================================ */

/* Step Indicator (비밀번호 찾기) */
.step-section {
    margin-bottom: 2rem;
}

.step-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 1rem;
    text-align: center;
}

.step-subtitle {
    font-size: 0.875rem;
    color: var(--color-text-light);
    text-align: center;
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.step-indicator {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 2rem;
}

.step-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    flex: 1;
    max-width: 120px;
    min-height: 70px;
}

.step-number {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    background: var(--color-border);
    color: var(--color-text-light);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1rem;
    transition: all 0.3s;
}

.step-item.active .step-number {
    background: var(--login-primary-color);
    color: var(--color-white);
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.2);
}

.step-item.completed .step-number {
    background: var(--color-info);
    color: var(--color-white);
}

.step-label {
    font-size: 0.75rem;
    color: var(--color-text-light);
    font-weight: 500;
    text-align: center;
}

.step-item.active .step-label {
    color: var(--login-primary-color);
    font-weight: 600;
}

.step-divider {
    flex: 1;
    height: 2px;
    background: var(--color-border);
    margin: 0 -0.5rem;
    margin-top: 1.125rem;
}

/* Auth Method Section (아이디 찾기) */
.auth-method-section {
    margin-bottom: 2rem;
}

.auth-method-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 1rem;
    text-align: center;
}

.auth-method-subtitle {
    font-size: 0.875rem;
    color: var(--color-text-light);
    text-align: center;
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

/* Auth Buttons */
.auth-button-group {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.auth-button {
    padding: 1.25rem 1rem;
    border: 2px solid var(--color-border);
    border-radius: 0.75rem;
    background: var(--color-white);
    cursor: pointer;
    transition: all 0.2s;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.auth-button:hover {
    border-color: var(--login-primary-color);
    background: rgba(59, 130, 246, 0.05);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.auth-button i {
    font-size: 2rem;
    color: var(--login-primary-color);
}

.auth-button-label {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text);
}

.auth-button-desc {
    font-size: 0.75rem;
    color: var(--color-text-light);
}

/* Temporary Password Card */
.temp-password-card {
    background: linear-gradient(135deg, var(--login-primary-color), var(--login-primary-hover));
    border-radius: 1rem;
    padding: 2rem;
    margin-bottom: 1.5rem;
    text-align: center;
    color: var(--color-white);
    box-shadow: var(--shadow-lg);
}

.temp-password-label {
    font-size: 0.875rem;
    opacity: 0.9;
    margin-bottom: 0.5rem;
}

.temp-password-value {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: 4px;
    margin: 1rem 0;
    font-family: 'Courier New', monospace;
    word-break: break-all;
}

.temp-password-warning {
    font-size: 0.75rem;
    opacity: 0.85;
    margin-top: 1rem;
    line-height: 1.6;
}

/* Copy Button */
.copy-button {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: var(--color-white);
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    cursor: pointer;
    font-size: 0.875rem;
    font-weight: 600;
    margin-top: 1rem;
    transition: all 0.2s;
}

.copy-button:hover {
    background: rgba(255, 255, 255, 0.3);
}

/* Info Card */
.info-card {
    background: var(--color-bg);
    border-radius: 0.75rem;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.info-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.info-title i {
    color: var(--login-primary-color);
}

.info-item {
    display: flex;
    justify-content: space-between;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--color-border);
}

.info-item:last-child {
    border-bottom: none;
}

.info-label {
    font-size: 0.875rem;
    color: var(--color-text-light);
    font-weight: 500;
}

.info-value {
    font-size: 0.875rem;
    color: var(--color-text);
    font-weight: 600;
}

/* Notice Box */
.notice-box {
    background: var(--color-warning-bg);
    border: 1px solid var(--color-warning);
    border-radius: 0.75rem;
    padding: 1rem;
    margin-bottom: 1.5rem;
}

.notice-title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    color: var(--color-warning);
    margin-bottom: 0.5rem;
}

.notice-list {
    list-style: none;
    padding-left: 1.5rem;
}

.notice-list li {
    font-size: 0.875rem;
    color: var(--color-text);
    line-height: 1.6;
    margin-bottom: 0.25rem;
    position: relative;
}

.notice-list li::before {
    content: '•';
    position: absolute;
    left: -1rem;
    color: var(--color-warning);
}

/* Error Message */
.error-message {
    background: var(--color-error-bg);
    border: 1px solid var(--color-error);
    color: var(--color-error);
    border-radius: 0.75rem;
    padding: 1rem;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.error-message i {
    font-size: 1.25rem;
}

/* Success Icon (본인인증 완료) */
.success-icon {
    text-align: center;
    margin-bottom: 1.5rem;
}

.success-icon i {
    font-size: 4rem;
    color: #22c55e;
}

/* Result Section (아이디 찾기) */
.result-section {
    display: none;
    animation: slideDown 0.3s ease-out;
}

.result-card {
    background: var(--color-bg);
    border-radius: 0.75rem;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.result-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.result-title i {
    color: var(--login-primary-color);
}

.result-content {
    padding: 0.5rem 0;
}

.result-item {
    display: flex;
    justify-content: space-between;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--color-border);
}

.result-item:last-child {
    border-bottom: none;
}

.result-label {
    font-size: 0.875rem;
    color: var(--color-text-light);
    font-weight: 500;
}

.result-value {
    font-size: 0.875rem;
    color: var(--color-text);
    font-weight: 600;
}

/* User ID List */
.user-id-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.user-id-item {
    background: var(--color-white);
    border: 2px solid var(--color-border);
    border-radius: 0.5rem;
    padding: 1rem;
    transition: all 0.2s;
}

.user-id-item:hover {
    border-color: var(--login-primary-color);
    transform: translateX(4px);
}

.user-id-value {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--login-primary-color);
    letter-spacing: 0.5px;
}

.user-id-date {
    font-size: 0.75rem;
    color: var(--color-text-light);
    margin-top: 0.25rem;
}

.user-id-item.clickable {
    cursor: pointer;
}

.user-id-item.clickable:hover {
    background: var(--color-light);
    border-color: var(--login-primary-color);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.user-id-hint {
    font-size: 0.75rem;
    color: var(--color-text-light);
    margin-top: 0.25rem;
}

.user-id-item.clickable:hover .user-id-hint {
    color: var(--login-primary-color);
}

/* Responsive - 아이디/비밀번호 찾기 추가 */
@media (max-width: 640px) {
    .auth-button-group {
        grid-template-columns: 1fr;
    }

    .step-indicator {
        gap: 0.5rem;
    }

    .step-item {
        max-width: 80px;
        min-height: 55px;
    }

    .step-number {
        width: 2rem;
        height: 2rem;
        font-size: 0.875rem;
    }

    .step-label {
        font-size: 0.625rem;
    }

    .step-divider {
        margin-top: 0.875rem;
    }

    .temp-password-value {
        font-size: 1.5rem;
        letter-spacing: 2px;
    }
}