/* 
 * MyApp - ログインシステム用スタイル
 * モダンなライトデザイン
 */

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #333;
}

.container {
    width: 100%;
    max-width: 1200px;
    padding: 20px;
    margin: 0 auto;
}

/* ========== ログインページ ========== */

.login-wrapper {
    background: white;
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    overflow: hidden;
    max-width: 400px;
    margin: 0 auto;
}

.login-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 40px 20px;
    text-align: center;
}

.login-header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    font-weight: 700;
}

.login-header p {
    font-size: 1rem;
    opacity: 0.9;
}

.login-form-area {
    padding: 40px 30px;
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #333;
    font-size: 0.95rem;
}

.form-group input {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #e0e0e0;
    border-radius: 6px;
    font-size: 1rem;
    transition: all 0.3s ease;
    font-family: inherit;
}

.form-group input:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.btn-login {
    width: 100%;
    padding: 14px;
    margin-top: 10px;
    font-size: 1rem;
}

.login-footer {
    background: #f5f5f5;
    padding: 20px 30px;
    text-align: center;
}

.demo-hint {
    font-size: 0.85rem;
    color: #999;
    margin: 0;
}

/* ========== メッセージ ========== */

.message {
    margin-top: 20px;
    padding: 15px 20px;
    border-radius: 6px;
    text-align: center;
    font-weight: 500;
    display: none;
}

.message:not(:empty) {
    display: block;
}

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

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

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

/* ========== トップページ ========== */

.toppage-header {
    background: white;
    padding: 20px 30px;
    border-radius: 12px;
    margin-bottom: 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.toppage-header h1 {
    font-size: 2rem;
    color: #667eea;
    margin: 0;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 20px;
}

.welcome-message {
    font-size: 1rem;
    color: #333;
    font-weight: 500;
    margin: 0;
}

.toppage-content {
    animation: fadeIn 0.5s ease;
}

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

/* ========== カード ========== */

.card {
    background: white;
    border-radius: 12px;
    padding: 30px;
    margin-bottom: 25px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.card:hover {
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
    transform: translateY(-2px);
}

.card h2 {
    color: #667eea;
    font-size: 1.5rem;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 2px solid #f0f0f0;
}

.card p {
    color: #666;
    line-height: 1.6;
    margin-bottom: 10px;
}

.card ul {
    list-style: none;
    padding-left: 0;
}

.card li {
    color: #666;
    padding: 8px 0;
    padding-left: 20px;
    position: relative;
    line-height: 1.6;
}

.card li:before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #667eea;
    font-weight: bold;
}

/* ========== セッション情報 ========== */

.session-info {
    background: #f8f9fa;
    border-left: 4px solid #667eea;
    padding: 15px 20px;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    font-size: 0.95rem;
}

.session-info p {
    margin: 8px 0;
    color: #333;
}

.session-info strong {
    color: #667eea;
}

/* ========== ボタン ========== */

.btn-primary,
.btn-secondary {
    padding: 12px 24px;
    font-size: 1rem;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s ease;
    font-family: inherit;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
}

.btn-primary:active {
    transform: translateY(0);
    box-shadow: 0 2px 8px rgba(102, 126, 234, 0.3);
}

.btn-secondary {
    background: #f0f0f0;
    color: #333;
    border: 1px solid #ddd;
}

.btn-secondary:hover {
    background: #e8e8e8;
    border-color: #ccc;
}

/* ========== フッター ========== */

footer {
    background: white;
    padding: 20px;
    text-align: center;
    border-radius: 12px;
    margin-top: 30px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

footer p {
    color: #999;
    margin: 0;
    font-size: 0.9rem;
}

/* ========== レスポンシブ ========== */

@media (max-width: 768px) {
    .toppage-header {
        flex-direction: column;
        text-align: center;
        gap: 15px;
    }

    .header-right {
        flex-direction: column;
        width: 100%;
        gap: 10px;
    }

    .btn-secondary {
        width: 100%;
    }

    .card {
        padding: 20px;
    }

    .card h2 {
        font-size: 1.2rem;
    }

    .login-header h1 {
        font-size: 2rem;
    }

    body {
        padding: 10px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 10px;
    }

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

    .login-form-area {
        padding: 25px 20px;
    }

    .form-group input {
        padding: 10px 12px;
    }

    .card {
        padding: 15px;
    }

    .card h2 {
        font-size: 1.1rem;
    }
}