#login-page {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-primary);
    z-index: 100;
    transition: opacity 0.5s ease;
}

#login-page.hidden {
    opacity: 0;
    pointer-events: none;
}

.login-container {
    width: 100%;
    max-width: 420px;
    padding: 20px;
}

.login-box {
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    padding: 40px 32px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
}

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

.login-header i {
    font-size: 48px;
    color: var(--accent);
    margin-bottom: 16px;
    background: var(--accent-light);
    padding: 16px;
    border-radius: 50%;
}

.login-header h1 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 4px;
}

.login-header p {
    color: var(--text-secondary);
    font-size: 14px;
}

.login-tabs {
    display: flex;
    gap: 0;
    margin-bottom: 24px;
    background: var(--bg-tertiary);
    border-radius: var(--border-radius-sm);
    padding: 4px;
}

.tab-btn {
    flex: 1;
    padding: 10px;
    text-align: center;
    border-radius: 6px;
    font-weight: 600;
    font-size: 14px;
    color: var(--text-secondary);
    transition: all 0.3s ease;
    -webkit-tap-highlight-color: transparent;
    -webkit-touch-callout: none;
    user-select: none;
    appearance: none;
}

.tab-btn:active {
    background: var(--bg-hover);
    transform: scale(0.96);
}

.tab-btn.active {
    background: var(--accent);
    color: white;
    box-shadow: 0 4px 12px var(--accent-glow);
}

.tab-btn.active:active {
    background: var(--accent-hover);
    transform: none;
}

.auth-form { display: none; }
.auth-form.active { display: block; }

.input-group {
    position: relative;
    margin-bottom: 16px;
}

.input-group i {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 16px;
    pointer-events: none;
}

.input-group input {
    width: 100%;
    padding: 14px 14px 14px 44px;
    background: var(--input-bg);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    color: var(--text-primary);
    font-size: 15px;
    outline: none;
    transition: border-color 0.3s ease;
}

.input-group input:focus {
    border-color: var(--accent);
}

.input-group input::placeholder {
    color: var(--text-muted);
}

.auth-btn {
    width: 100%;
    padding: 14px;
    background: var(--accent);
    color: white;
    border: none;
    border-radius: var(--border-radius-sm);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 8px;
}

.auth-btn:hover {
    background: var(--accent-hover);
    box-shadow: 0 4px 16px var(--accent-glow);
    transform: translateY(-1px);
}

.error-msg {
    color: var(--danger);
    font-size: 13px;
    margin-top: 12px;
    text-align: center;
    min-height: 20px;
}

/* Mobile login */
@media (max-width: 480px) {
    .login-container { padding: 12px; }
    .login-box { padding: 28px 20px; }
    .login-header { margin-bottom: 24px; }
    .login-header i { font-size: 40px; padding: 14px; }
    .login-header h1 { font-size: 24px; }
    .login-header p { font-size: 13px; }
    .input-group input { padding: 12px 12px 12px 40px; font-size: 16px; }
    .auth-btn { padding: 12px; font-size: 15px; }
    .tab-btn { padding: 8px; font-size: 13px; }
}

@media (max-width: 360px) {
    .login-box { padding: 20px 16px; }
    .login-header i { font-size: 32px; padding: 10px; }
    .login-header h1 { font-size: 20px; }
}