.login-modal {
    position: fixed;
    inset: 0;
    background: rgba(5, 9, 16, 0.7);
    backdrop-filter: blur(6px);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.25s ease, visibility 0.25s ease;
    z-index: 1100;
    padding: 20px;
}

.login-modal.active {
    opacity: 1;
    visibility: visible;
}

.login-box {
    background: linear-gradient(180deg, var(--card-bg) 0%, var(--card-bg-deep) 100%);
    width: 100%;
    max-width: 460px;
    border: 1px solid var(--border-color);
    border-radius: 22px;
    padding: 36px 32px;
    position: relative;
    text-align: center;
    color: var(--text);
    box-shadow:
        0 50px 80px rgba(0, 0, 0, 0.55),
        0 0 0 1px rgba(191, 212, 255, 0.08);
    transform: translateY(12px) scale(0.96);
    opacity: 0;
    transition: opacity 0.25s ease, transform 0.25s ease;
}

.login-modal.active .login-box {
    transform: translateY(0) scale(1);
    opacity: 1;
}

.login-close {
    position: absolute;
    top: 14px;
    right: 14px;
    border: 1px solid var(--border-color);
    background: rgba(15, 22, 32, 0.6);
    color: var(--text);
    width: 36px;
    height: 36px;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.15s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.login-close:hover {
    color: var(--accent);
    border-color: var(--accent);
    transform: rotate(90deg);
}

.login-illustration {
    position: relative;
    width: 96px;
    height: 96px;
    margin: 0 auto 18px;
    display: grid;
    place-items: center;
}

.username-head {
    position: relative;
    z-index: 2;
    width: 80px;
    height: 80px;
    image-rendering: pixelated;
    border-radius: 12px;
    background: rgba(15, 22, 32, 0.6);
    border: 2px solid var(--primary);
    padding: 6px;
}

.login-glow {
    position: absolute;
    inset: -10px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(191, 212, 255, 0.35) 0%, transparent 70%);
    filter: blur(10px);
    z-index: 1;
    animation: pulse 2.4s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 0.5; transform: scale(1); }
    50%      { opacity: 1; transform: scale(1.1); }
}

.login-box h2 {
    margin: 0 0 8px;
    color: var(--text);
    font-size: 22px;
    font-weight: 800;
}

.login-sub {
    color: var(--text-muted);
    margin: 0 0 22px;
    font-size: 14px;
    line-height: 1.5;
}

.username-field {
    display: flex;
    align-items: center;
    gap: 10px;
    background: rgba(15, 22, 32, 0.7);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 12px 16px;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.username-field:focus-within {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(191, 212, 255, 0.12);
}

.username-field i {
    color: var(--primary);
    font-size: 14px;
}

.username-field input {
    border: none;
    background: none;
    outline: none;
    flex: 1;
    font-size: 15px;
    color: var(--text);
    font-family: inherit;
    font-weight: 600;
}

.username-field input::placeholder { color: var(--text-muted); font-weight: 500; }

.login-hint {
    font-size: 12px;
    color: var(--text-muted);
    margin: 12px 0 22px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

.login-hint i { color: var(--accent); }
.login-hint strong { color: var(--accent); }

.login-button {
    width: 100%;
    padding: 14px 20px;
    border: none;
    background: linear-gradient(135deg, var(--primary), var(--primary-soft));
    color: #0c1626;
    font-weight: 800;
    font-size: 15px;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 12px 28px rgba(191, 212, 255, 0.3);
    font-family: inherit;
}

.login-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 16px 32px rgba(191, 212, 255, 0.45);
}

.login-button span {
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.login-error {
    margin: 14px 0 0;
    color: #f87171;
    font-size: 13px;
    font-weight: 600;
}

.login-box.shake {
    animation: modalShake 0.35s ease;
}

@keyframes modalShake {
    0%   { transform: translateX(0); }
    20%  { transform: translateX(-8px); }
    40%  { transform: translateX(8px); }
    60%  { transform: translateX(-5px); }
    80%  { transform: translateX(5px); }
    100% { transform: translateX(0); }
}

@media (max-width: 480px) {
    .login-box { padding: 28px 22px; border-radius: 18px; }
    .login-box h2 { font-size: 19px; }
    .login-illustration { width: 80px; height: 80px; }
    .username-head { width: 64px; height: 64px; padding: 5px; }
    .username-field input { font-size: 16px; }
}