/* ============================================================
   ParentsReport_Login.css
   로그인 페이지 스타일시트
   담당: 정선구 선생님 LMS 학부모 보고서 서비스
   ============================================================ */

/* ── CSS 변수 (테마 토큰) ── */
:root {
    /* 메인 컬러: 따뜻한 네이비 + 민트 포인트 */
    --clr-primary:      #1e3a5f;
    --clr-primary-lt:   #2e5499;
    --clr-accent:       #00b4a0;
    --clr-accent-lt:    #e0f7f5;

    /* 배경 */
    --clr-bg:           #f0f4f9;
    --clr-card:         #ffffff;

    /* 텍스트 */
    --clr-text:         #1a2b42;
    --clr-text-muted:   #5a7082;
    --clr-blue-msg:     #1a5fad;
    --clr-red-msg:      #d63b3b;

    /* 폰트 */
    --font-body:        'Noto Sans KR', sans-serif;
    --font-display:     'DM Serif Display', serif;

    /* 그림자 */
    --shadow-card:      0 20px 60px rgba(30, 58, 95, 0.12), 0 4px 16px rgba(30, 58, 95, 0.08);
    --shadow-btn:       0 8px 24px rgba(0, 180, 160, 0.35);

    /* 둥근 모서리 */
    --radius-card:      20px;
    --radius-input:     12px;
    --radius-btn:       14px;

    /* 전환 효과 */
    --transition:       0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ── 리셋 & 기본 ── */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html, body {
    height: 100%;
}

body {
    font-family: var(--font-body);
    background-color: var(--clr-bg);
    color: var(--clr-text);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
    overflow-x: hidden;
}

/* ── 배경 장식 원형 요소 ── */
.bg-decor {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

.bg-circle {
    position: absolute;
    border-radius: 50%;
    opacity: 0.06;
}

.bg-circle--1 {
    width: 500px;
    height: 500px;
    background: var(--clr-primary);
    top: -150px;
    right: -100px;
}

.bg-circle--2 {
    width: 350px;
    height: 350px;
    background: var(--clr-accent);
    bottom: -80px;
    left: -80px;
    opacity: 0.09;
}

.bg-circle--3 {
    width: 200px;
    height: 200px;
    background: var(--clr-primary-lt);
    top: 40%;
    left: 60%;
    opacity: 0.05;
}

/* ── 로그인 카드 래퍼 ── */
.login-wrapper {
    position: relative;
    z-index: 1;
    background: var(--clr-card);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
    padding: 44px 40px 36px;
    width: 100%;
    max-width: 440px;

    /* 카드 등장 애니메이션 */
    animation: cardFadeUp 0.5s var(--transition) both;
}

@keyframes cardFadeUp {
    from { opacity: 0; transform: translateY(24px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ── 로그인 헤더 ── */
.login-header {
    text-align: center;
    margin-bottom: 32px;
}

.login-logo {
    width: 68px;
    height: 68px;
    background: linear-gradient(135deg, var(--clr-primary), var(--clr-primary-lt));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    font-size: 2rem;
    box-shadow: 0 6px 20px rgba(30, 58, 95, 0.25);
}

.login-logo__icon {
    line-height: 1;
}

.login-title {
    font-family: var(--font-body);
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--clr-primary);
    letter-spacing: -0.5px;
    margin-bottom: 8px;
}

.login-title--accent {
    color: var(--clr-accent);
}

.login-subtitle {
    font-size: 0.85rem;
    color: var(--clr-text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

/* 베타 뱃지 */
.badge-beta {
    display: inline-block;
    background: var(--clr-accent);
    color: #fff;
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    padding: 2px 7px;
    border-radius: 20px;
    vertical-align: middle;
}

/* ── 폼 그룹 ── */
.login-form {
    display: flex;
    flex-direction: column;
    gap: 18px;
    margin-bottom: 24px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 7px;
}

.form-label {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--clr-primary);
    display: flex;
    align-items: center;
    gap: 6px;
}

.form-label__icon {
    font-size: 1rem;
}

.form-input {
    width: 100%;
    height: 50px;
    padding: 0 16px;
    font-size: 1rem;
    font-family: var(--font-body);
    color: var(--clr-text);
    background: #f7f9fc;
    border: 2px solid #e2e8f0;
    border-radius: var(--radius-input);
    outline: none;
    transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
}

.form-input:focus {
    background: #fff;
    border-color: var(--clr-accent);
    box-shadow: 0 0 0 4px rgba(0, 180, 160, 0.12);
}

.form-input::placeholder {
    color: #b0bec5;
    font-size: 0.9rem;
}

/* ── 로그인 버튼 ── */
.btn-login {
    width: 100%;
    height: 54px;
    background: linear-gradient(135deg, var(--clr-accent), #00958a);
    color: #fff;
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-btn);
    cursor: pointer;
    box-shadow: var(--shadow-btn);
    transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-top: 4px;
}

.btn-login:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(0, 180, 160, 0.45);
}

.btn-login:active {
    transform: translateY(0);
    box-shadow: var(--shadow-btn);
}

.btn-login__arrow {
    font-size: 1.1rem;
    transition: transform var(--transition);
}

.btn-login:hover .btn-login__arrow {
    transform: translateX(4px);
}

/* ── 안내 메세지 ── */
.login-notice {
    border-top: 1px solid #eef0f4;
    padding-top: 20px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.notice-item {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    font-size: 0.82rem;
    line-height: 1.55;
}

.notice-item__icon {
    flex-shrink: 0;
    margin-top: 1px;
}

.notice-item--blue {
    color: var(--clr-blue-msg);
}

.notice-item--red {
    color: var(--clr-red-msg);
    font-weight: 400;
}

/* ── 반응형: 태블릿 (768px 이하) ── */
@media (max-width: 768px) {
    .login-wrapper {
        padding: 36px 28px 28px;
        max-width: 400px;
    }

    .login-title {
        font-size: 1.55rem;
    }
}

/* ── 반응형: 모바일 (480px 이하) ── */
@media (max-width: 480px) {
    body {
        padding: 16px;
        align-items: flex-start;
        padding-top: 40px;
    }

    .login-wrapper {
        padding: 28px 20px 24px;
        border-radius: 16px;
    }

    .login-logo {
        width: 58px;
        height: 58px;
        font-size: 1.7rem;
    }

    .login-title {
        font-size: 1.35rem;
    }

    .form-input {
        height: 46px;
        font-size: 0.95rem;
    }

    .btn-login {
        height: 50px;
        font-size: 0.95rem;
    }

    .notice-item {
        font-size: 0.78rem;
    }
}

/* ── 반응형: 초소형 (360px 이하) ── */
@media (max-width: 360px) {
    body {
        padding: 12px;
        padding-top: 24px;
    }

    .login-title {
        font-size: 1.2rem;
    }
}