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

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background: radial-gradient(circle at 30% 20%, rgba(120, 84, 255, 0.55), transparent 55%),
                radial-gradient(circle at 80% 0%, rgba(255, 76, 161, 0.4), transparent 45%),
                linear-gradient(180deg, #03050b 0%, #060a13 60%, #050811 100%);
    min-height: 100vh;
    color: var(--text-primary);
}

.login-shell {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.login-container {
    background: rgba(8, 12, 20, 0.82);
    border-radius: 30px;
    box-shadow: 0 35px 95px rgba(0, 0, 0, 0.65), inset 0 1px rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.08);
    width: 100%;
    max-width: 420px;
    padding: 48px;
    padding-bottom: 56px;
    backdrop-filter: blur(28px) saturate(160%);
    -webkit-backdrop-filter: blur(28px) saturate(160%);
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.login-header {
    text-align: center;
    margin-bottom: 32px;
}

.login-brand {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    border-radius: 18px;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.35), rgba(236, 72, 153, 0.22));
    border: 1px solid rgba(255, 255, 255, 0.12);
    box-shadow: 0 18px 45px rgba(99, 102, 241, 0.25);
    margin: 0 auto 18px;
}

.login-brand i {
    font-size: 1.25rem;
    color: rgba(245, 247, 255, 0.95);
}

.login-header h1 {
    font-size: 2.2rem;
    margin-bottom: 0.5rem;
    color: #e9ddff;
    letter-spacing: 0.5px;
}

.login-header p {
    color: rgba(230, 232, 240, 0.78);
    font-size: 0.95rem;
}

.login-description {
    margin-top: 14px;
    padding-top: 14px;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    font-size: 0.9rem;
    line-height: 1.55;
    color: rgba(230, 232, 240, 0.72);
}

.login-description strong {
    color: rgba(245, 247, 255, 0.92);
    font-weight: 600;
}

.form-group {
    margin-bottom: 0;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.9rem;
}

.form-group input {
    width: 100%;
    padding: 0.85rem;
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    background: rgba(5, 8, 16, 0.7);
    color: var(--text-primary);
    transition: var(--transition-fast);
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.25);
    background: rgba(5, 8, 16, 0.85);
}

.login-btn {
    width: 100%;
    padding: 0.9rem;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.6), rgba(139, 92, 246, 0.8));
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    box-shadow: 0 10px 30px rgba(79, 70, 229, 0.35);
}

@media (max-width: 520px) {
    .login-shell {
        padding: 1.25rem;
    }

    .login-container {
        padding: 34px;
        padding-bottom: 42px;
        border-radius: 24px;
    }

    .login-header h1 {
        font-size: 1.9rem;
    }
}

.login-btn:hover {
    filter: brightness(1.05);
    transform: translateY(-1px);
}

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

.error-message {
    display: none;
    background-color: rgba(248, 113, 113, 0.2);
    color: #fecaca;
    border: 1px solid rgba(248, 113, 113, 0.35);
    padding: 0.85rem;
    border-radius: var(--radius-md);
    margin-bottom: 4px;
    font-size: 0.9rem;
}

.error-message.is-visible {
    display: block;
}

.is-hidden {
    display: none !important;
}

.loading {
    display: none;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.loading.is-visible {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
}

.spinner {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-top: 2px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-right: 8px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}