/* ============================================
   ログイン画面スタイル
   ============================================ */

/* 背景 */
.login-bg {
    position: fixed;
    inset: 0;
    background: radial-gradient(ellipse at 20% 50%, #0a1628 0%, #080c14 60%);
    overflow: hidden;
    z-index: 0;
}

.grid-overlay {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(0,212,255,0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0,212,255,0.04) 1px, transparent 1px);
    background-size: 50px 50px;
    mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
}

.orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.25;
    animation: float 8s ease-in-out infinite;
}
.orb-1 { width: 500px; height: 500px; background: #0066ff; top: -150px; left: -100px; }
.orb-2 { width: 400px; height: 400px; background: #00d4ff; bottom: -100px; right: 10%; animation-delay: -3s; }
.orb-3 { width: 300px; height: 300px; background: #8b5cf6; top: 40%; left: 60%; animation-delay: -6s; }

@keyframes float {
    0%, 100% { transform: translateY(0) scale(1); }
    50% { transform: translateY(-30px) scale(1.05); }
}

/* ラッパー */
.login-wrapper {
    position: relative;
    z-index: 1;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

/* カード */
.login-card {
    width: 100%;
    max-width: 440px;
    background: rgba(17, 24, 39, 0.85);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: var(--radius-xl);
    padding: 40px;
    box-shadow: 0 25px 60px rgba(0,0,0,0.6), 0 0 0 1px rgba(0,212,255,0.05) inset;
    animation: slideUp 0.5s ease;
}

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

/* ロゴ */
.login-logo {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 32px;
}

.logo-icon {
    width: 48px;
    height: 48px;
    background: var(--accent-gradient);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    color: #fff;
    box-shadow: 0 4px 20px rgba(0,212,255,0.3);
    flex-shrink: 0;
}

.logo-text { display: flex; flex-direction: column; }
.logo-main {
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.logo-sub { font-size: 0.7rem; color: var(--text-muted); letter-spacing: 0.05em; margin-top: 1px; }

/* タブ */
.login-tabs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    background: rgba(255,255,255,0.04);
    border-radius: var(--radius-md);
    padding: 4px;
    margin-bottom: 24px;
    gap: 4px;
}

.tab-btn {
    padding: 10px;
    border: none;
    background: transparent;
    color: var(--text-muted);
    font-size: 0.8rem;
    font-weight: 500;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    font-family: var(--font-sans);
}

.tab-btn.active {
    background: rgba(0,212,255,0.12);
    color: var(--accent-cyan);
    border: 1px solid rgba(0,212,255,0.2);
}
.tab-btn:not(.active):hover { color: var(--text-secondary); background: rgba(255,255,255,0.04); }

/* タブコンテンツ */
.tab-content { display: none; }
.tab-content.active { display: block; animation: fadeIn 0.25s ease; }

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

.tab-desc { font-size: 0.8rem; color: var(--text-muted); margin-bottom: 20px; }

/* フォーム */
.form-group { margin-bottom: 16px; }

.form-label {
    display: flex;
    align-items: center;
    gap: 7px;
    font-size: 0.78rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 7px;
}
.form-label i { color: var(--accent-cyan); font-size: 0.75rem; }

.form-input {
    width: 100%;
    padding: 11px 14px;
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 0.88rem;
    font-family: var(--font-sans);
    transition: var(--transition);
    outline: none;
}
.form-input::placeholder { color: var(--text-muted); }
.form-input:focus {
    border-color: var(--accent-cyan);
    background: rgba(0,212,255,0.05);
    box-shadow: 0 0 0 3px rgba(0,212,255,0.08);
}

.input-password { position: relative; }
.input-password .form-input { padding-right: 42px; }
.toggle-pw {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 0.85rem;
    padding: 4px;
    transition: var(--transition);
}
.toggle-pw:hover { color: var(--accent-cyan); }

/* オプション行 */
.form-options {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.78rem;
    color: var(--text-secondary);
    cursor: pointer;
    user-select: none;
}
.checkbox-label input { display: none; }
.checkmark {
    width: 16px;
    height: 16px;
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: 4px;
    background: rgba(255,255,255,0.04);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    flex-shrink: 0;
}
.checkbox-label input:checked ~ .checkmark {
    background: var(--accent-cyan);
    border-color: var(--accent-cyan);
}
.checkbox-label input:checked ~ .checkmark::after {
    content: '✓';
    font-size: 10px;
    color: #000;
    font-weight: 700;
}

.forgot-link { font-size: 0.78rem; color: var(--text-muted); }
.forgot-link:hover { color: var(--accent-cyan); }

/* ログインボタン */
.btn-login {
    width: 100%;
    padding: 13px;
    background: var(--accent-gradient);
    border: none;
    border-radius: var(--radius-md);
    color: #fff;
    font-size: 0.9rem;
    font-weight: 600;
    font-family: var(--font-sans);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all 0.3s ease;
    letter-spacing: 0.02em;
    box-shadow: 0 4px 20px rgba(0,212,255,0.25);
}
.btn-login:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 28px rgba(0,212,255,0.4);
}
.btn-login:active { transform: translateY(0); }

/* アラート */
.alert-area { margin-bottom: 16px; }
.alert {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 14px;
    border-radius: var(--radius-md);
    font-size: 0.82rem;
}
.alert-error { background: rgba(239,68,68,0.12); border: 1px solid rgba(239,68,68,0.25); color: #fca5a5; }
.alert-success { background: rgba(16,185,129,0.12); border: 1px solid rgba(16,185,129,0.25); color: #6ee7b7; }

/* ノート */
.login-note {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-top: 16px;
    font-size: 0.73rem;
    color: var(--text-muted);
}
.login-note i { color: var(--accent-cyan); }

/* フッター */
.login-footer {
    margin-top: 28px;
    padding-top: 20px;
    border-top: 1px solid var(--border);
    text-align: center;
    font-size: 0.72rem;
    color: var(--text-muted);
}