/**
 * AI Link - 고객 회원가입 스타일
 * 버전: 3.4 (토스트 메시지 시스템 추가)
 * 작성일: 2025-11-07
 * 
 * 개선사항:
 * - CSS 변수 도입 (일관된 디자인)
 * - 전문적인 버튼 그라데이션
 * - 향상된 애니메이션 효과
 * - 반응형 디자인 강화
 * - 토스트 메시지 시스템 (회원가입 성공/실패 알림)
 */

/* ====================================
   CSS 변수 정의
==================================== */

:root {
    /* 컬러 */
    --primary-color: #3498db;
    --primary-hover: #2980b9;
    --success-color: #27ae60;
    --success-hover: #229954;
    --error-color: #e74c3c;
    --warning-color: #f39c12;
    --info-color: #3498db;
    
    /* 텍스트 */
    --text-primary: #2c3e50;
    --text-secondary: #6c757d;
    --text-light: #95a5a6;
    
    /* 배경 */
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-dark: #2c3e50;
    
    /* 테두리 */
    --border-color: #dee2e6;
    --border-radius: 6px;
    --border-radius-lg: 8px;
    --border-radius-xl: 12px;
    
    /* 간격 */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 12px;
    --spacing-lg: 16px;
    --spacing-xl: 24px;
    --spacing-2xl: 32px;
    
    /* 폰트 크기 */
    --font-size-xs: 12px;
    --font-size-sm: 13px;
    --font-size-base: 14px;
    --font-size-lg: 16px;
    --font-size-xl: 20px;
    --font-size-2xl: 24px;
    
    /* 그림자 */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.1);
    
    /* 전환 */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* ====================================
   인증 컨테이너
==================================== */

.auth-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: var(--spacing-xl);
}

.auth-card {
    background: var(--bg-primary);
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow-lg);
    padding: 40px;
    max-width: 500px;
    width: 100%;
    animation: slideUp 0.4s ease;
}

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

/* ====================================
   헤더
==================================== */

.auth-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.auth-logo {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-lg);
}

.auth-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.auth-subtitle {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
}

/* ====================================
   폼 그룹
==================================== */

.form-group {
    margin-bottom: var(--spacing-xl);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-size: var(--font-size-base);
    font-weight: 500;
    color: var(--text-primary);
}

.form-group input,
.form-group select {
    width: 100%;
    padding: var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: var(--font-size-base);
    transition: all var(--transition-base);
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

/* ====================================
   필드 상태
==================================== */

.form-group.has-error input,
.form-group.has-error select {
    border-color: var(--error-color);
}

.form-group.has-success input,
.form-group.has-success select {
    border-color: var(--success-color);
}

.error-message {
    color: var(--error-color);
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-xs);
    display: none;
}

.form-group.has-error .error-message {
    display: block;
}

.success-message {
    color: var(--success-color);
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-xs);
    display: none;
}

.form-group.has-success .success-message {
    display: block;
}

.help-text {
    margin-top: var(--spacing-xs);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

/* ====================================
   이메일 입력 그룹
==================================== */

.input-with-button,
.email-input-group {
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
}

.input-with-button input,
.email-input-group input {
    flex: 1;
}

.btn-check {
    min-width: 100px;
    white-space: nowrap;
    padding: 10px 16px;
    font-size: var(--font-size-base);
    transition: all var(--transition-base);
}

.btn-check.checked {
    background: var(--success-color);
    color: white;
    border-color: var(--success-color);
}

.btn-check.checked:hover {
    background: var(--success-hover);
}

/* ====================================
   비밀번호 입력
==================================== */

.password-input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.password-input-wrapper input {
    flex: 1;
    padding-right: 45px;
}

.password-toggle {
    position: absolute;
    right: var(--spacing-md);
    background: none;
    border: none;
    cursor: pointer;
    font-size: 18px;
    padding: var(--spacing-xs);
    opacity: 0.6;
    transition: opacity var(--transition-fast);
}

.password-toggle:hover {
    opacity: 1;
}

/* ====================================
   인증 섹션
==================================== */

.verification-section {
    margin-top: var(--spacing-xl);
    padding: var(--spacing-xl);
    background: var(--bg-secondary);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--border-color);
}

.verification-timer {
    margin-top: var(--spacing-sm);
    font-size: var(--font-size-base);
    color: var(--text-primary);
    font-weight: 500;
}

#timerDisplay {
    color: var(--error-color);
    font-weight: 600;
}

.verification-actions {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.verification-actions .btn {
    flex: 1;
}

.verification-error {
    margin-top: var(--spacing-md);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    font-size: var(--font-size-base);
    background: #fee;
    color: var(--error-color);
    display: none;
}

.verification-error:not(:empty) {
    display: block;
}

/* ====================================
   메시지 박스
==================================== */

.message-box {
    padding: var(--spacing-md) var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    border-radius: var(--border-radius);
    font-size: var(--font-size-base);
    font-weight: 500;
    opacity: 0;
    transform: translateY(-10px);
    transition: all var(--transition-base);
    display: none;
}

.message-box.show {
    opacity: 1;
    transform: translateY(0);
    display: block;
}

.message-box.info {
    background: #d1ecf1;
    color: #0c5460;
    border: 1px solid #bee5eb;
}

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

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

.message-box.warning {
    background: #fff3cd;
    color: #856404;
    border: 1px solid #ffeeba;
}

/* ====================================
   버튼 스타일
==================================== */

.btn {
    padding: var(--spacing-md) var(--spacing-xl);
    border: none;
    border-radius: var(--border-radius);
    font-size: var(--font-size-base);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-base);
    text-align: center;
}

.btn-primary {
    background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
    color: white;
    border: none;
}

.btn-primary:hover:not(:disabled) {
    background: linear-gradient(135deg, #1a3461 0%, #234780 100%);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(30, 60, 114, 0.3);
}

.btn-primary:active:not(:disabled) {
    transform: translateY(0);
}

.btn-secondary {
    background: #f5f5f5 !important;
    color: #333 !important;
    border: 1px solid #ddd !important;
    padding: 12px 16px !important;
}

.btn-secondary:hover:not(:disabled) {
    background: #e8e8e8 !important;
    border-color: #ccc !important;
}

.btn-text {
    background: transparent;
    color: var(--primary-color);
    text-decoration: underline;
}

.btn-text:hover:not(:disabled) {
    color: var(--primary-hover);
}

.btn-block {
    display: block;
    width: 100%;
}

.btn-lg {
    padding: 14px 28px;
    font-size: var(--font-size-lg);
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* 버튼 로딩 상태 */
.btn[data-loading="true"] {
    position: relative;
    color: transparent;
    pointer-events: none;
}

.btn[data-loading="true"]::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    top: 50%;
    left: 50%;
    margin-left: -8px;
    margin-top: -8px;
    border: 2px solid #ffffff;
    border-radius: 50%;
    border-top-color: transparent;
    animation: spinner 0.6s linear infinite;
}

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

/* ====================================
   이메일 인증 버튼 강조 스타일
==================================== */

/* 필수 강조 클래스 */
.highlight-required {
    position: relative;
    animation: pulse-border 2s ease-in-out infinite;
    border: 2px solid #ff6b6b !important;
    box-shadow: 0 0 0 3px rgba(255, 107, 107, 0.2) !important;
}

@keyframes pulse-border {
    0%, 100% {
        box-shadow: 0 0 0 3px rgba(255, 107, 107, 0.2);
    }
    50% {
        box-shadow: 0 0 0 6px rgba(255, 107, 107, 0.3);
    }
}

/* 버튼 흔들림 애니메이션 */
.shake-animation {
    animation: shake 0.5s cubic-bezier(.36,.07,.19,.97) both;
}

@keyframes shake {
    0%, 100% {
        transform: translateX(0);
    }
    10%, 30%, 50%, 70%, 90% {
        transform: translateX(-5px);
    }
    20%, 40%, 60%, 80% {
        transform: translateX(5px);
    }
}

/* ====================================
   체크박스 그룹
==================================== */

.checkbox-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin: var(--spacing-xl) 0;
}

.checkbox-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
}

.checkbox-item input[type="checkbox"] {
    margin-top: 3px;
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: var(--primary-color);
    flex-shrink: 0;
}

.checkbox-item label {
    font-size: var(--font-size-base);
    color: var(--text-primary);
    cursor: pointer;
    user-select: none;
    line-height: 1.6;
}

/* ====================================
   안내 박스
==================================== */

.benefits-box {
    margin-top: var(--spacing-xl);
    padding: var(--spacing-lg);
    background: #e8f4f8;
    border-radius: var(--border-radius-lg);
    border-left: 4px solid var(--primary-color);
}

.benefits-box h3 {
    margin: 0 0 var(--spacing-md) 0;
    font-size: var(--font-size-lg);
    color: var(--text-primary);
}

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

.benefits-box li {
    padding: var(--spacing-xs) 0;
    font-size: var(--font-size-base);
    color: var(--text-primary);
}

/* ====================================
   경고 박스
==================================== */

.warning-box {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-md);
    background: #fff3cd;
    border-radius: var(--border-radius);
    border: 1px solid #ffeeba;
}

.warning-box p {
    margin: var(--spacing-xs) 0;
    font-size: var(--font-size-sm);
    color: #856404;
}

/* ====================================
   링크 스타일
==================================== */

.auth-link {
    text-align: center;
    margin-top: var(--spacing-xl);
    font-size: var(--font-size-base);
    color: var(--text-secondary);
}

.auth-link a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-fast);
}

.auth-link a:hover {
    color: var(--primary-hover);
    text-decoration: underline;
}

.link-text {
    color: var(--primary-color);
    text-decoration: none;
    font-size: var(--font-size-sm);
    margin-left: var(--spacing-xs);
    transition: color var(--transition-fast);
}

.link-text:hover {
    color: var(--primary-hover);
    text-decoration: underline;
}

/* ====================================
   기타 스타일
==================================== */

.required {
    color: var(--error-color);
}

.divider {
    height: 1px;
    background: var(--border-color);
    margin: var(--spacing-xl) 0;
}

/* ====================================
   반응형 디자인
==================================== */

@media (max-width: 768px) {
    .auth-card {
        padding: var(--spacing-xl);
    }
    
    .auth-title {
        font-size: var(--font-size-xl);
    }
    
    .auth-subtitle {
        font-size: var(--font-size-sm);
    }
}

@media (max-width: 576px) {
    .auth-container {
        padding: var(--spacing-lg);
    }
    
    .auth-card {
        padding: var(--spacing-xl);
    }
    
    .auth-title {
        font-size: var(--font-size-xl);
    }
    
    .auth-subtitle {
        font-size: var(--font-size-sm);
    }
    
    .btn-lg {
        padding: var(--spacing-md) var(--spacing-xl);
        font-size: var(--font-size-lg);
    }
    
    .input-with-button,
    .email-input-group {
        flex-direction: column;
    }
    
    .input-with-button input,
    .input-with-button .btn,
    .email-input-group input,
    .email-input-group .btn {
        width: 100%;
    }
    
    .verification-actions {
        flex-direction: column;
    }
}

/* ====================================
   애니메이션
==================================== */

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

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

/* ====================================
   접근성 개선
==================================== */

.btn:focus,
input:focus,
select:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

.btn:focus:not(:focus-visible),
input:focus:not(:focus-visible),
select:focus:not(:focus-visible) {
    outline: none;
}

/* ====================================
   프린트 최적화
==================================== */

@media print {
    .auth-container {
        background: white;
    }
    
    .btn,
    .warning-box,
    .benefits-box {
        display: none;
    }
}

/* ====================================
   토스트 메시지 시스템
   버전: 1.0
   추가일: 2025-11-07
==================================== */

.toast {
    position: fixed;
    top: 20px;
    right: 20px;
    min-width: 300px;
    max-width: 500px;
    padding: 16px 20px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    display: flex;
    align-items: center;
    gap: 12px;
    transform: translateX(400px);
    transition: transform 0.3s ease;
    z-index: 10000;
    font-family: 'Noto Sans KR', sans-serif;
}

.toast.show {
    transform: translateX(0);
}

.toast-icon {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    font-size: 14px;
    font-weight: bold;
    flex-shrink: 0;
}

.toast-message {
    flex: 1;
    font-size: 14px;
    color: #333;
    line-height: 1.5;
}

/* Success Toast */
.toast-success {
    border-left: 4px solid #10b981;
}

.toast-success .toast-icon {
    background: #d1fae5;
    color: #10b981;
}

/* Error Toast */
.toast-error {
    border-left: 4px solid #ef4444;
}

.toast-error .toast-icon {
    background: #fee2e2;
    color: #ef4444;
}

/* Warning Toast */
.toast-warning {
    border-left: 4px solid #f59e0b;
}

.toast-warning .toast-icon {
    background: #fef3c7;
    color: #f59e0b;
}

/* Info Toast */
.toast-info {
    border-left: 4px solid #3b82f6;
}

.toast-info .toast-icon {
    background: #dbeafe;
    color: #3b82f6;
}

/* 모바일 반응형 */
@media (max-width: 576px) {
    .toast {
        top: 10px;
        right: 10px;
        left: 10px;
        min-width: auto;
        max-width: none;
        transform: translateY(-100px);
    }
    
    .toast.show {
        transform: translateY(0);
    }
}