/* =================================================================
 * 福祉輸送管理システム v3.1 - ログインページ専用CSS
 *
 * ファイル: /css/login.css
 * 作成日: 2025年11月13日
 * 説明: index.phpのインラインCSSを外部ファイル化
 * ================================================================= */

/* モダンミニマル統一スタイル */
:root {
    --primary: #2196F3;
    --primary-dark: #1976D2;
    --success: #4CAF50;
    --warning: #FFC107;
    --danger: #F44336;
    --info: #00BCD4;
    --white: #FFFFFF;
    --light-gray: #F8F9FA;
    --medium-gray: #6C757D;
    --dark-gray: #343A40;
    --black: #1A1A1A;
}

body {
    font-family: 'Noto Sans JP', 'Hiragino Kaku Gothic ProN', sans-serif;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0;
    padding: 20px;
}

.login-container {
    background: var(--white);
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
    padding: 0;
    width: 100%;
    max-width: 420px;
    overflow: hidden;
    backdrop-filter: blur(10px);
    animation: fadeInUp 0.6s ease-out;
}

.login-header {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: var(--white);
    padding: 2rem;
    text-align: center;
    position: relative;
}

.login-header::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
    pointer-events: none;
}

.login-header h1 {
    font-size: 1.75rem;
    font-weight: 600;
    margin: 0 0 0.5rem 0;
    text-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.login-header .subtitle {
    font-size: 0.9rem;
    opacity: 0.9;
    margin: 0;
    font-weight: 400;
}

.login-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--white);
    opacity: 0.9;
}

.login-body {
    padding: 2rem;
}

.form-floating {
    margin-bottom: 1.5rem;
    position: relative;
}

.form-control {
    border: 2px solid #E9ECEF;
    border-radius: 12px;
    padding: 1rem;
    font-size: 1rem;
    transition: all 0.3s ease;
    background-color: var(--light-gray);
}

.form-control:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 0.2rem rgba(33, 150, 243, 0.25);
    background-color: var(--white);
}

.form-floating > label {
    color: var(--medium-gray);
    font-weight: 500;
    padding: 1rem;
}

.btn-login {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    border: none;
    border-radius: 12px;
    color: var(--white);
    padding: 1rem;
    font-size: 1.1rem;
    font-weight: 600;
    width: 100%;
    margin-top: 1rem;
    transition: all 0.3s ease;
    text-transform: none;
}

.btn-login:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(33, 150, 243, 0.4);
    background: linear-gradient(135deg, var(--primary-dark) 0%, #1565C0 100%);
    color: var(--white);
}

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

.alert {
    border: none;
    border-radius: 12px;
    padding: 1rem;
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
    border-left: 4px solid var(--danger);
}

.alert-danger {
    background-color: #FFF5F5;
    color: #C53030;
}

.system-info {
    text-align: center;
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid #E9ECEF;
    font-size: 0.85rem;
    color: var(--medium-gray);
}

.version-badge {
    display: inline-block;
    background: var(--primary);
    color: var(--white);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 500;
    margin-top: 0.5rem;
}

/* PWAインストール促進バナー */
.pwa-banner {
    display: none;
    background: linear-gradient(135deg, #4CAF50 0%, #45a049 100%);
    color: white;
    padding: 1rem;
    text-align: center;
    margin: -2rem -2rem 2rem -2rem;
    font-size: 0.9rem;
    animation: slideDown 0.5s ease;
}

.pwa-banner.show {
    display: block;
}

.pwa-banner button {
    background: rgba(255,255,255,0.2);
    border: 1px solid rgba(255,255,255,0.3);
    color: white;
    border-radius: 6px;
    padding: 0.5rem 1rem;
    margin-left: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

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

/* レスポンシブ対応 */
@media (max-width: 576px) {
    .login-container {
        margin: 10px;
        border-radius: 12px;
    }

    .login-header {
        padding: 1.5rem;
    }

    .login-header h1 {
        font-size: 1.5rem;
    }

    .login-body {
        padding: 1.5rem;
    }

    .login-icon {
        font-size: 2rem;
    }
}

/* ダークモード対応 */
@media (prefers-color-scheme: dark) {
    .login-container {
        background: #2D2D2D;
        box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    }

    .form-control {
        background-color: #404040;
        border-color: #555555;
        color: #FFFFFF;
    }

    .form-floating > label {
        color: #CCCCCC;
    }

    .system-info {
        color: #CCCCCC;
        border-color: #555555;
    }
}

/* アニメーション */
@keyframes slideDown {
    from {
        transform: translateY(-100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

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