@charset "UTF-8";

/* ========================================
   ログイン画面全体
======================================== */

.login-page {
    min-height: 100vh;
}

/* ログイン画面ではサイドバー用の余白を解除する */
.login-main {
    display: flex;
    align-items: center;
    justify-content: center;

    width: 100%;
    max-width: none;
    min-height: calc(100vh - 96px - 53px);

    margin: 0;
    padding: 48px 24px;

    overflow: visible;
    background: transparent;
    border: 0;
    border-radius: 0;
    box-shadow: none;
}

/* ========================================
   ログインカード
======================================== */

.login-card {
    position: relative;
    width: 100%;
    max-width: 460px;
    padding: 38px 40px 40px;

    overflow: hidden;

    background:
        linear-gradient(
            145deg,
            rgba(255, 255, 255, 0.98),
            rgba(247, 251, 255, 0.96)
        );

    border: 1px solid rgba(61, 116, 190, 0.18);
    border-radius: 20px;

    box-shadow:
        0 24px 60px rgba(25, 73, 137, 0.14),
        0 4px 14px rgba(25, 73, 137, 0.06);
}

/* カード上部のアクセントライン */
.login-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 12%;
    width: 76%;
    height: 3px;

    background: linear-gradient(
        90deg,
        transparent,
        #4082e7,
        #78a9f5,
        transparent
    );

    border-radius: 999px;
}

/* ========================================
   カードヘッダー
======================================== */

.login-card__header {
    margin-bottom: 30px;
    text-align: center;
}

.login-card__eyebrow {
    margin: 0 0 8px;

    color: #4b7fc4;

    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.16em;
}

.login-card__title {
    margin: 0;

    color: #173f72;

    font-size: 30px;
    font-weight: 700;
    line-height: 1.3;
}

.login-card__description {
    margin: 10px 0 0;

    color: #657d9d;

    font-size: 14px;
    line-height: 1.6;
}

/* ========================================
   ログインフォーム
======================================== */

.login-form {
    width: 100%;
}

.login-field {
    margin-bottom: 22px;
}

.login-field__label {
    display: block;
    margin-bottom: 7px;

    color: #294f80;

    font-size: 14px;
    font-weight: 700;
}

.login-field__control {
    position: relative;
}

.login-field__input {
    width: 100%;
    height: 48px;
    margin: 0;
    padding: 11px 14px;

    color: #173a68;
    background-color: #f8fbff;

    border: 1px solid #c8d8ec;
    border-radius: 10px;

    font-size: 15px;

    transition:
        background-color 0.18s ease,
        border-color 0.18s ease,
        box-shadow 0.18s ease,
        transform 0.18s ease;
}

.login-field__input::placeholder {
    color: #93a4ba;
}

.login-field__input:hover {
    border-color: #9db9df;
}

.login-field__input:focus {
    outline: none;

    background-color: #ffffff;
    border-color: #5389df;

    box-shadow:
        0 0 0 4px rgba(83, 137, 223, 0.13),
        0 6px 14px rgba(40, 91, 159, 0.07);

    transform: translateY(-1px);
}

/* 入力エラーがある入力欄 */
.login-field__input.input-error {
    background-color: #fff8f9;
    border-color: #dc687a;

    box-shadow:
        0 0 0 3px rgba(220, 104, 122, 0.1);
}

.login-field__input.input-error:focus {
    border-color: #d6455d;

    box-shadow:
        0 0 0 4px rgba(214, 69, 93, 0.13);
}

/* ========================================
   入力項目別エラー
======================================== */

.login-field-error {
    display: none;
    align-items: flex-start;
    gap: 7px;

    margin-top: 8px;

    color: #a12d40;

    font-size: 13px;
    line-height: 1.5;

    animation: login-error-enter 0.3s
        cubic-bezier(0.22, 1, 0.36, 1) both;
}
.login-field-error.is-visible {
    display: flex;

    animation: login-error-enter 0.3s
        cubic-bezier(0.22, 1, 0.36, 1) both;
}
.login-field-error__icon {
    display: inline-flex;
    flex: 0 0 17px;
    align-items: center;
    justify-content: center;

    width: 17px;
    height: 17px;
    margin-top: 1px;

    color: #ffffff;
    background-color: #d6455d;

    border-radius: 50%;

    font-size: 11px;
    font-weight: 700;
    line-height: 1;
}

.login-field-error__text {
    flex: 1;
}

/* ========================================
   認証・システムエラー
======================================== */

.login-message {
    display: flex;
    align-items: flex-start;
    gap: 11px;

    margin-bottom: 24px;
    padding: 13px 14px;

    border: 1px solid;
    border-radius: 10px;

    animation: login-message-enter 0.36s
        cubic-bezier(0.22, 1, 0.36, 1) both;
}

/* ログイン認証エラー */
.login-message--authentication {
    color: #8e293b;
    background-color: #fff1f3;
    border-color: #efb4bf;

    box-shadow:
        0 5px 14px rgba(170, 45, 67, 0.07);
}

/* システムエラー */
.login-message--system {
    color: #7b5515;
    background-color: #fff8e6;
    border-color: #e8cf91;

    box-shadow:
        0 5px 14px rgba(150, 102, 25, 0.07);
}

.login-message__icon {
    display: inline-flex;
    flex: 0 0 21px;
    align-items: center;
    justify-content: center;

    width: 21px;
    height: 21px;
    margin-top: 1px;

    color: #ffffff;
    border-radius: 50%;

    font-size: 13px;
    font-weight: 700;
    line-height: 1;
}

.login-message--authentication .login-message__icon {
    background-color: #d6455d;
}

.login-message--system .login-message__icon {
    background-color: #d39a2d;
}

.login-message__content {
    flex: 1;
    min-width: 0;
}

.login-message__title {
    margin: 0 0 3px;

    font-size: 14px;
    font-weight: 700;
    line-height: 1.4;
}

.login-message__text {
    margin: 0;

    font-size: 13px;
    line-height: 1.55;
}

/* ========================================
   ログインボタン
======================================== */

.login-actions {
    display: flex;
    justify-content: center;

    margin-top: 30px;
}

.login-submit {
    width: 220px;
    min-height: 46px;
    margin: 0;
    padding: 11px 24px;

    color: #ffffff;

    background-image: linear-gradient(
        110deg,
        #1d4f9c 0%,
        #3479df 34%,
        #6aa2f5 50%,
        #3479df 66%,
        #1d4f9c 100%
    );

    background-position: 100% 50%;
    background-size: 240% 100%;

    border: 0;
    border-radius: 11px;

    font-size: 15px;
    font-weight: 700;
    letter-spacing: 0.05em;

    box-shadow:
        0 8px 18px rgba(35, 87, 155, 0.2);

    transition:
        background-position 0.65s ease,
        box-shadow 0.18s ease,
        filter 0.18s ease,
        transform 0.18s ease;
}

.login-submit:hover {
    background-position: 0% 50%;

    box-shadow:
        0 12px 24px rgba(35, 87, 155, 0.26);

    transform: translateY(-2px);
}

.login-submit:active {
    box-shadow:
        0 5px 12px rgba(35, 87, 155, 0.2);

    transform: translateY(1px) scale(0.985);
}

.login-submit:focus-visible {
    outline: 3px solid rgba(80, 143, 235, 0.3);
    outline-offset: 3px;
}

/* ========================================
   表示アニメーション
======================================== */

@keyframes login-message-enter {
    from {
        opacity: 0;
        transform: translateY(-7px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes login-error-enter {
    from {
        opacity: 0;
        transform: translateY(-4px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ========================================
   レスポンシブ対応
======================================== */

@media (max-width: 600px) {
    .login-main {
        min-height: auto;
        margin: 0;
        padding: 28px 16px;
    }

    .login-card {
        max-width: 100%;
        padding: 30px 22px 32px;
        border-radius: 16px;
    }

    .login-card__title {
        font-size: 26px;
    }

    .login-submit {
        width: 100%;
        margin: 0;
    }
}

/* OSのアニメーション軽減設定に対応する */
@media (prefers-reduced-motion: reduce) {
    .login-card,
    .login-message,
    .login-field-error,
    .login-field__input,
    .login-submit {
        animation: none;
        transition: none;
    }
}